Synology replace drive with bad sectors. 4G Linux RAID /dev/sdga2 .

Synology replace drive with bad sectors I have Raid 1 set up. Reply Replace the drive with the fastest growing bad sectors first. Also, do I need to replace with same size drive- I would like to put a larger drive in. If it goes up, even by a small margin, I plan to replace it with a spare that's already on-site. I think I might have made a mistake in getting ready to replace the drive. when "r" - Locates bad sectors and recovers readable information. The system has detected storage pool data on the drive. A week ago one of the drives failed (bad sectors), so I replaced it. Step 1: Locate the bad drive. "We recommend running a The bad sectors on drive 1 on DS1819+ have increased. I don't know anymore. Reply. Before the drive fails for good, I want to replace it. I am following the steps in this guide - if it passes the extended SMART test then I’ll just copy the data back to the disk I was just hoping there might be a way to do it without having to completely I've recently been having the exact same issue, Volume degrades, but drives are healthy. M. I've ordered a replacement drive (same model) whilst the RMA process is on-going, so will end up with 5 drives once it's completed. The time this will take is dependent on the array size and number of disks in it. So you will replace it after you deal with the current failure. Even though the RAID is still operational, it’s best practice to replace the hard drive before any data gets corrupted due to the It is possible that an exception happened on the drive firmware level. If you have a drive that repairs stuff during two I have a DiskStation 116j for about three years. If it goes up I woild replace the drive. But a few bad sectors means inevitably you will get more, so it’s best to replace the drive while you can still access the data than later when it The drive isn’t totally dead, it only has one bad sector so I thought it should still be ok to use? This Synology KB indicates one bad sector is not a huge issue if the drive tests ok. B. The Health Info page doesn't show the bad sectors or I/O connection issues that were reported by email. Bad sectors are a common phenomenon for HDDs. S. I started the repair process to add the new drive to the system and about half-way through it failed with bad sectors. My CloudDrive was not syncing (I guess due to bad sectors and corrupted data). As you have just realized, all perceived savings you achieved by opting for non-redundant storage are about to be negated with the time you are going to sink into copying stuff around, redoing the array, and re-downloading affected files every time bad sectors appears. Just follow the instructions and you're good to go. A replacement drive is already on order, but I was hoping to limp this one through However, if your bad sector count continues to grow, you definitely have problems and need to replace the drive. So I ended up opening the drive based on a youtube video, and taking it apart. if you have Raid1,5,6 then you can wait until it fails but it may be at the worst time. Replacing a defective drive with Bad sectors are a common phenomenon for HDDs. Or maybe something else is going on, two drives exhibiting bad sectors on the very same day? Very unlikely. If the drive were out of warranty, and economics prevented you from replacing it, you could attempt to repair the bad sectors with Spinrite, or its competitor HDDRegenerator, My 4TB drive in bay 4 has gone from 1 bad sector to 54 over the past week. Posted by u/FormulaMonkey - No votes and 14 comments Bad sectors are a common phenomenon for HDDs. R. I logged in and saw that it currently has 1041 bad sectors. Hot Spare. Te previous notice on Feb 2nd had the failing sector count at 24. Bad sectors doesn't mean a drive has failed but it means it's on its way to the great ewaste dump in the sky sooner than later. Won't be going back there for a while due to covid. Comment. Got multiple email warnings from the NAS about the drive having a "constantly increasing number of bad sectors". I added the drive and repaired the storage pool and it completed. I received an alert from my Synology RAID regarding a few bad sectors on a hard drive. I popped the "bad" drive into my ds1019+ and ran the extended SMART test on it today and it's coming back with 1 bad sector. I used to allow it the hour or so to do this. To summarize from previous post: Don't run the NAS in SHR without all disks. Look it up for the drive with all of those bad sectors too. As others have said, if some sectors are going bad, it's a good chance that it's the beginning of a Bad sectors are a common phenomenon for HDDs. Please back up your data immediately and then replace the drive. The bad sectors on drive 1 on DS1819+ have increased. You can still remove the failed drive, and then worry about getting a new drive (RMA a drive that's still under warranty or buy a new drive if not). Both of those will take a long time Initially I had 4 x WD Red 6TB disks set up as RAID-5 in my DS413j. 000h running. Since your drive has not failed yet, take your time and get a replacement drive. A month ago I started getting notifications that I have bad sectors on the WD. I have DS1019+ with 5 8TB IronWolf Pro drives with SHR and one of my drives was starting to fail (it had a bad sector count in the 3000 range) so I bought a replacement drive so I could send the bad drive back to Seagate. Do I just pull the 'bad' drive and replace with a new one? Or do you do something in the DSM GUI? Report; Have a look at the DSM Help in the web UI, or in the Users Manual, or at the Synology tutorials for Bad sectors are a common phenomenon for HDDs. Status: Normal Bad sector count: 131056 Drive reconnection count: 4 Drive re-identification count: 0 Raid 5 is healthy, I was in the process of moving a bunch of large files around when the message occurred. The drive is assigned as a hot spare drive. This behavior will cause bad performance from the drive, and eventually data corruption or loss Bad sectors are a common phenomenon for HDDs. To avoid catastrophic failure and the potential for data loss that goes with it, I'd replace immediately. Drive #4 has a bad sector warning showing 2 bad sectors. Oldest I'm still transferring data from the old storage device to the Synology. 4G Linux RAID /dev/sdga2 Unfortunately you don't really have a way to proove it either or. After replacing the known-bad drive, while rebuilding the array, another drive was flagged as bad and the array crashed. I schedule a daily quick SMART test and a weekly Extended, both have been failing for at least a week, but I cannot tell what SMART check is the culprit so I can begin the RMA process. A place to answer all your Synology questions. I had 2 WD Red 4TB drives fail this year after 35K hours of continuous service (3 others are still running strong with zero bad sectors). No bad sectors. I have a HD with 11 bad sectors from 2 years ago and still up and running. It's a good idea to run the tests periodically so you can catch when a drive starts to fail. That drive was setup as an iSCSI target, the "new" file level stuff that synology forced (I was Synology simply tells the drive to run SMART diagnostics and displays what is returned. So people use different strategies. Moreover a new drive should never arrive with any bad sectors, regardless of the capacity or manufacturer. HGST tends to be more noisy but generally have better reliability One of my Synology DS1513+ units is reporting "Bad Sector Count 8" on Disk 2. T Current_Pending_Sector goes up, but after an extended S. Any ideas what this means? Should I replace the drive? The volume shows Normal so unsure what this implies? Many thanks. If after a month there are no new bad sectors, then the drive is almost certainly fine, but if you see new ones every day, then the drive needs to be replaced ASAP. As soon as you have bad sectors I would NEVER trust a drive after that. SynoForum. With SHR-1, you have 1 drive redundancy. For what it's worth DSM is installed on the drive. com NAS DS918+, DS218+(2), RS820+ Operating system. They are all out of warranty. I've run the extended SMART scan and the IronWolf Health check and both come back "healthy. I don't have a drive of the same or larger size to replace the failed drive with. SMART test of course stuck at 90%. This disk have 76. then login to the DS414, install your replacement drive and initiate the array rebuild process. Personally I would keep a drive with less than a coiple dozen bad sectors assuming the count doesn't continuously go up. A community to discuss Synology NAS and networking devices Both of those will take a long time for a 10TB drive. The WD tool then asked if I wanted to repair, noting a I could lose data in the process. I ended up replacing three drives. Also work on a backup strategy. Chris @chris_992. What is the best procedure to ensure the safety of my data on the system. Replace bad sector drive - deactivate vs hot swap . When you get it, you can replace the drive and it should rebuild okay. 2 bad sectors isn't worth replacing IMHO. Wondering if the Synology OS is able to "rope off" bad sectors and the drive can continue to be kept in service or if I If it's in the budget, maybe it is time to refactor the whole thing - back up the NAS, upgrade the 5 drives to 4 larger ones configured as SHR-1 (or replace the ones you can afford with larger drives - SHR-1 is more flexible than RAID 5 in getting more from mismatched drive sizes), restore from backup, then then leave 1 bay free for future drive replacement operations. Should I immediately replace that drive? Geeked NAS Hosted. Bad sector count: 5 Drive reconnection count: 0 Drive re-identification count: 0 . They usually appear when a drive has been physically damaged (dropped, etc) or when a drive is in the later stages of physical failure. test and the IronWolf (Seagate brand) health test and both say that the drive is healthy. Report; I would not replace the drive, would replace when the bad sector count is increasing fast. Replacing a defective SSD with a healthy SSD prevents the cache group from becoming degraded. 1700 is insane i would never ever put a hard drive back in a customers pc if it had 1700 bad sectors, let alone 1. For detailed instructions, refer to the articles for DSM 7 or DSM 6. I have two harddrives that every-so-often report bad sectors (1-3) when I do large operations (as-in full disk backups). My first drive just recently reported it now has 8 bad sectors. Synology reported 8 bad sectors found. Statistics have shown that drives with bad sectors are more likely to be damaged than those without bad sectors. If you have a single bad or three weeks ago I started receiving notifications from my Synology DS414 about a (1) bad sector in hdd 3 which now has grown into 36 bad sectors (same hdd). Kev Before You Start. All drive have a certain amount of "spare" area on them to compensate for bad sectors Secondly, if they are hot swappable, my process to replace a single disk in a RAID6 (which is using 8 of the available 12 drives) is: Storage Manager -> HSS/SDD -> Select the drive [in my case drive 5 with a warning due to bad sectors] -> Deactivate. What is the best process to remove and erase the offending drive from the array before adding the new one in? A community to discuss Synology NAS and networking devices Or should I wait until I can get a replacement drive, and rebuild my volume. Check the drive or health status. Should I apply for the data rescue or just replace the drive and it will copy from drive 2 over to replacement? Telos. Anyone ever seen a new drive have that extremely high of a bad sector count? Replace Drive. I shut down the array, removed the drive in question, and ran an extended WD drive test. this is a soft call. The sector won’t respond to read or write requests. com is an unofficial Absolutely true about the risk of a second failure. You can use the Replace Drive feature to safely replace an SSD in an SSD cache group to achieve the following purposes:. I left it to see if I got an increase this month and still the same: Drive reconnection count: 1. I have a DS412+ and I have had to replace a HD on two occasions due to bad sectors that were detected. I'm wondering if this change made the bad sectors become visible. Then I sealed it back up and returned it to the store. So I have a 4-bay Synology with 4x 2TB drives in it. May 14, 2024 0 Likes. Shortly after that the drive discovers that it has to realign the head I ordered a new hard drive to replace the drive that is getting the alert, but I tried turning it off, taking out the hard drive, and putting it back in, and the drive shows a status of "Initialized, Normal, Bad Sector Count". 137 65 nashosted. And a google for 'synology dsm "remap the drive after reboot"' doesn't really help either. I need help making the right decision about replacing a failing disk in my Synology NAS. One of the drives now got bad sectors (1 bad sector during last month’s check, 36 bad sectors now) and I want to replace it. Disk 1 is in a warning state and Diskstation is reporting bad sectors and I/O errors on it. I have a DiskStation 116j for about three years. when "f" - Fixes errors on the disk. Would copying files from a drive with bad sectors corrupt the data? Reply reply TheCrustyCurmudgeon • Bad sectors are evidence of physical deterioration of the drive. 1 As long as the increase in the Bad sector count is not drastic, there should be no cause for concern. Why do I get a popup, can't it Bad sectors are a common phenomenon for HDDs. One of the four drives in my DS413j failed, so I replaced it with a larger one (the original was 1tb, the replacement is 2tb). Edit: Updating my answer to say that the questionable drive should be checked daily. I would not bother my 5yr old drive until it shows signs of failing. Some people replace their drives at the first bad sector to be safe. I have the model DS1512+ with five 3GB Seagate drives in it, in a RAID 5 array. If you are using Synology's RAID in its default mode you can survive one drive failure. You're looking for bad sectors and re-allocated sectors. I bought it with a WD Red Hard drive. The bad sectors are remapped during the scrub process, so if you don't get more bad sectors in the next month or so your probably OK. Bad sectors are areas of physical damage to the drive platter. Then swap the disk for a replacement (same make and model). Also watch the Disk Reconnection and Re-Identification counts. Bad sectors may have contained data and indeed if another drive in the array were to begin to fail or outright fail at or around the same time. Generally I use SHR1 with one global hotspare. You can. Hi! Come and join us at Synology Community. OT: if you want to replace the drive you should go to your raid settings, click on the hdd and there should be a replace option. About to file for a warranty replacement. Your Synology NAS must contain at least one unused drive. After you perform a few drive tests and things such as secure erase (which writes blanks to the whole drive), the firmware on the HDD may have determined that the sector is now okay and has reduced the count in the temporary/pending bad sector SMART values. The drive is assigned to a storage pool. I still have three drives with bad sectors, but the highest number of bad sectors on the remaining drives is 10. I will be keeping an eye on those three drives. recurring bad sectors too. The risk is just too great to leave something that has a bad sector growth of even just 1. For replacement, you might also consider the Toshiba, Seagate ironwolf and the HGST drives that are all competitive. You can replace the drive and rebuild the volume (synology has instructions). These will give you an indication about the status of the disk. I was I received an alert from my Synology RAID regarding a few bad sectors on a hard drive. The system has 5 2TB hard drives (WD Red WD20EFRX) configured as Synology Hybrid RAID. Llama wrote:As indicated in the second sentence of my post ;) all of them say OK. Relevant posts DS1010 Bad sectors are a common phenomenon for HDDs. If you don't have a spare drive, don't worry. Hello, I’m new to Synology and this is the situation: Rackstation RS3617xs Storage Pool 1 (Warning) RAID 6, btrfs - 9x HDD (WDC WD6002FFWX) Drive 10 as Hot Spare Now the issue: Drive 1: Allocation Normal, Health: Failing (Bad sector count: 857) Drive 7: Allocation Normal, Health: Failing (Bad sector count: 16) Drives are in warranty, and the provider wants Go to synology r/synology • can I replace this with another 6TB that I had pulled previously to replace the drive with bad sectors or will I have to get a 10TB to replace this? Running SHR-2 This thread is archived New comments cannot be posted and votes cannot be cast comments Now 1 of those drives is reporting multiple I/O errors, has a multitude of bad sectors etc. I guess I should stop If I try to backup this drive using Synology's Active Backup for Business (which has an agent running on the Windows PC), it'll fail and the windows log will refer to bad sectors. So I backed it up and am preparing to replace the bad one, but I have some questions since this isn’t my forte: Does the brand or specs on the drive matter much, or will and 4tb drive do? Also does it matter if the old drive is a traditional drive and I switch to an SSD? Drives that have developed bad sectors are 10X more likely to result in failed drive access than those which don’t have any bad sectors. I read a lot on the net, I did some SMART checks and then eventually decided to replace the drive. A drive with bad sectors is not healthy. I cleaned the connectors on Drive 2 recently, so wondering if it's the NAS Bad sectors are a common phenomenon for HDDs. 3 4 Just replace the drive. I told DSM6 to report when any disk had 25 bad sectors, and today, one showed up. Even though the RAID is still operational, it’s best practice to replace the hard drive before any data gets corrupted due to the If your Synology NAS does not have any unused drives or if its DSM version is older than DSM 7, replace the defective drive one at a time and repair the storage pool (DSM You can use the Replace Drive feature to replace a drive in your Synology NAS to prevent storage pool degradation or expand the storage pool capacity. My concern is that the UI reports 0 bad sectors and 0 drive reconnections, while the log and emails show a number of bad sectors and I/O errors. I tried to complete a basic SMART test but after 15 minutes, it still hangs at 90% completion. run the Current_Pending_Sector count is back to 0 (Reallocated_Sector_Count Bad sectors are a common phenomenon for HDDs. There isn't any software, that I am aware of, that will fix a bad HDD platter. Toggle Dropdown. Currently my system health is in critical status due to multiple UNC errors on Drive 2. Then yesterday the other old drive failed, this time more seriously--bad sectors, inable to access system partition, drive unplugged, all of which repeated after I I found errors in both HD of my synology 216+II. Status: Failing Drive reconnection count: 0 Bad sector count: 40 Drive re-identification count: 0. So Hey all -- I have a 6 bay Synology DS1618+. You need to invoke a full read/write surface scan of the disk (may need special tools to do this), or you can do a full (not quick) format of the drive. If a sector comes back with a bad read the NAS will tell the drive to mark the sector as bad and use a spare sector from the pool of hidden All I want to know is, should I repair the filesystem immediately while I wait for the new drive to arrive? Or should I wait until the drive arrives, the disk is replaced and the array is repaired? Like I said it's an SHR2 (RAID6 based) array so I would think that bad sectors on that drive shouldn't corrupt the data in the filesystem. Could inserting the hot spare have caused the bad sectors on disk2? A community to discuss Synology NAS and networking devices unsued sectors replace bad sectors and sometimes bad sectors get repaired. So I have a HDD that is under warranty, and it is getting bad sectors. Use the spare drive or replace it with a new drive to repair the degraded storage pool. ; Select the suspected failed drive. In this case the drive So I have a DS216play, and one of my two disks gave me a bad sector warning - 37 bad sectors, but everything else seems to be ok. Comment Bad sectors are a common phenomenon for HDDs. Bad sectors can occur on both traditional magnetic hard drives and modern solid-state drives. I am unsure of the simplest/safest way to replace the drive and retain/restore the data. It's free to sign up and bid on jobs. From what I've read it's best to replace this asap. If you are concerned that in a month that it takes to replace the disk new bad sectors wil appear on Bad sectors are a common phenomenon for HDDs. If it starts reporting bad sectors again, I would replace the drive. Data is important and drives A Synology license online shop powered on vDSM, VMM and MailPlus. Sure enough, the test found 8 back sectors. T. Subscriber. I have a DS-413 with 4 3TB drives. It's usually a good idea to have a spare drive ready to go. My question is on one of the hard disks there is only one bad sector reported and I want to know if I can repair the HD / mark the sector bad so that I Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need. As for recounts, that disk may need to be re-seated. Anyone ever seen a new drive have that extremely high of a bad sector count? It asks me to reboot it and allow the bad sectors to be remapped. The replacement drive and all the others in my DS420+ have run flawlessly for almost two years now. Bad sectors, can I still recover iSCSI? C. I've read that sometimes Bad sectors on Synology NAS . It finds people asking the same question and no real answer. Birdy @_birdy_. If chkdsk cannot lock the drive, a message appears that asks you if you want to check the drive the next time you restart the computer. A community to discuss Synology NAS and networking devices and I'm starting to get emails from the automated SMART scans that I've got some bad sectors — 16 sectors on a 4tb drive. When I get any bad sectors is this a great concern, or does it just mean that the Disk Station has compensated for them? Is this an indication that I should replace the drive now? I have a DS720+ with a failing 10Tb WD Red Plus drive- last seven days have had "increasing bad sector" notices. Rapid change in any parameter is always a reason to replace the disk. Generally I have one cold spare (sometimes I've been caugh lacking) A global hotspare can act as a hotspare for more than one Nas (never gone this deep, but seems like it's a feasible option within the settings). I ran the quick S. Bad Sectors on drive 4 S. I have a replacement on order, but I have several A bad sector on a hard drive is simply a tiny cluster of storage space — a sector — of the hard drive that appears to be defective. One of the live drives is playing up, bad sector count increasing, casuing IO alerts, but weirdly is still reported as "normal" and hence no automatic swap to hot spare. " I'd replace both drives with larger ones if the space will be After each replace I am doing a volume repair. I'm going to replace the disk simply based on it's age, that's not my concern here. However, each time I did I would pull up the drive health info and they always still show 0 Bad Sectors. Or that it thinks it did it, and it honestly did, but the surface of the physical platter is coming apart. After you replace the drive and boot up (note: the NAS will start beeping), you should login to DSM, stop the beep, go to Storage Manager and click on the Manage/Repair option for the volume. tests regularly, the other Bad sectors are a common phenomenon for HDDs. 1. Buy a replacement and swap it in ASAP, having confirmed if other drives are getting bad sectors and this The drive you have is "working" but when its spewing bad sectors like that you have no idea if when the OS says "write a 0 to this sector" and the drive replies "ok, done!" that it actually did it. Your storage pool must be in one of the following RAID configurations: SHR, SHR-2, RAID 1, RAID 5, RAID 6, RAID 10, or RAID F1. Detected 1. I have finished the process and it all went smoothly. They can be scheduled to run automatically. Last week one of the 4 disks in my Synology started reporting bad sectors, up to as high as around 400 at one point. What is the best way to get the hot spare to replace the faulty drive? 1 - pull ut the faulty drivee - assume the hot spare would then automatically take over Search for jobs related to Synology replace drive with bad sectors or hire on the world's largest freelancing marketplace with 24m+ jobs. Sep 14, 2019 0 Replies 99 Views 0 (3TB Seagate desktop drive) not being able to run out and get some more drives, I shut down the 214se NAS until I was able to replace drives. Got a message that I have bad sectors on one of the drives. Should I immediately replace that drive? Responses (1-3) Sorted by. Here is what I've done so far. 2. I decided to replace the drive that had the most reported bad sectors first. . Replace when a drive fails, or shows likelihood of imminent failure (eg increasing number of bad sectors). An extra layer of prevention Other than running S. usually when you start noticing bad sectors its on it's way out. ; The Replace Drive button only appears when all the following criteria are met: . Wow I forgot about this thread. Use the RAID Calculator to see if replacing a drive will impact the capacity of your storage pool. Bad sectors (typically) means the drive failure is imminent. 5 TiB, 6001175126016 bytes, 11721045168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: yyy Device Start End Sectors Size Type /dev/sdga1 256 4980735 4980480 2. FYI: you could also just wait and see if it gets worse or not. Go to Storage Manager > HDD/SSD. However, last month the monthly report came through advising Drive reconnection count: 1 for drive in Bay 5. I've logged onto the NAS and followed the trail of messages in Storage manager which (after being taken from one tab to another after another) basically gives the same message of bad sectors, drive is failing, replace it. Synology's bad sector definition includes 05/197/198, where the 197/198 values may be reduced. A. Also, the presence of 197/198 does not mean that the hard drive is damaged. Disk Information shows Storage Pool 1 warning (disk 4) 2 bad sectors. I recently changed this 415Play config from a 4 disk SHR to a 2 disk RAID1. I had exactly that happen with my 4+1 array. So I have a DS216play, and one of my two disks gave me a bad sector warning - 37 bad sectors, but everything else seems to be ok. 400 bad sectors is a sign of a failing drive that could break any day so I’d replace that first. A community to discuss Synology NAS and networking devices Hi everyone! I posted some time ago regarding a drive with bad sectors and got some nice feedback. They will cause the bad sectors to be detected and substituted for sectors kept in reserve to replace bad ones over time. First happened to Drive 2, yesterday it happened to Drive 1. We recommended 119 votes, 33 comments. Headed down to the office now to replace that drive while I figure out what's going on with it. Check the drive status; Go to Storage Manager > HDD/SSD. I feel like Synology err's on the safe side in terms of bad sectors. Where the drive is thinking it hit a bad sector and reports this issue to the controler. This is the only drive in the NAS. New bad sectors are PHYSICAL DAMAGE that has recently occurred; they are often a clear sign of impending drive failure. Then I dremeled the shit out of every platter. Yes, you'll have to pay money. I have drives that are 5yrs old and running great but most others died or failed at 2 yrs. According to they key information on drive, bad sector count shot up on this drive. So I have a raid1 in a DS211j. The disk must be locked. Drive one has been experiencing bad sectors which are increasing slowly but regularly, and even though testing shows the drive is healthy, I have been thinking swapping the drive is the right choice. I was going to replace the drive but I'm confused and think I may have gotten a Bad sectors are a common phenomenon for HDDs. Welp I already put the replacement drive in the ds212j and it's offsite. Drive 2 on DS414 is severely damaged and is failing. Not the 27 bad sectors that it said it had when it was in the 212j. Ask a question or start a discussion now. When a drive has bad sectors, some of the following symptoms may appear: The Bad sector count shows a value other than 0. If you do, just slide the new one in after removing the failed drive. Then send your failed drive off to get replaced, and when you get it, use it or keep it as a spare or help with backups or whatever. If the status is not Healthy, the drive may be defective and needs to be replaced. DSM is installed on the drive. You can have 4, or 4,000. The drive can be assigned to a storage pool. There is an increase in my drive's bad sector count. Maybe this is a good opportunity to switch to that. When I look at Storage Manager overview it shows the drives are set up with Synology Hybrid Raid (SHR) with data protection of 1 disk Fault-Tolerance. the I/O errors on Drive 1 can be consequence of the Bad sector in the Drive 2? I ordered 1 HD to replace (4TB), but I am not sure if I should replace Drive 1, Drive 2, or, worst Less complicated would be using SHR or RAID5. Yesterday I found a notification that I had bad sectors in Drive 1 (220+ Raid 1) Thanks I looked it up on Synology site and 1 is left 2 right. Do not hesitate - immediately make sure you It could only be a few bad sectors that’s not affecting the drives function. Eject it slightly and wait 10 seconds for the disk to spin down then fully remove it (the Synology will start beeping due to loss of redundancy) Bad sectors are a common phenomenon for HDDs. So I'be been getting UNC errors and bad sectors in one of my 4 drives for a while now. Yikes. I asked some people around and it was said to just replace it as once drives start to go bad, they have a tendency to do so quickly at some point - who knows when that would be. Replacing an existing SSD with a larger-capacity SSD allows the capacity of the cache group to be expanded. A few weeks ago, DSM / Storage Manager reported one of these (Disk 2) as having 15 bad sectors, and advised. Disk /dev/sdga: 5. For more information, refer to the help articles for DSM 7 and DSM 6. Normal. I'm not sure; maybe it's detecting the same bad sectors over and over again. on my DS1515+. FWIW, I build/manage half a dozen Synos, probably 30+ disks across them, and only one disk has a bad sector count above zero - it's 1, and has held at 1 for months. hif dmher aoelqbi nhhmzg rii qtfofw rqshf tplkw bakuda cra