Hi all, recently my NAS was showing "degrading" on the front panel. I logged in to the NAS and found out it was Disk 1 on the way out so I replaced it with a larger 4Tb disk (from 3TB) and after it finished going through the motions, I logged in to have a look and now the volume has disappeared and an error saying "Remove inactive volumes to use the disk. Disk #2,3,4. The 3 drives are also shaded in red but not showing any errors on them. Any help would be much appreciated Thanks Terry

tez7171 wrote: Hi all, recently my NAS was showing "degrading" on the front panel. I logged in to the NAS and found out it was Disk 1 on the way out so I replaced it with a larger 4Tb disk (from 3TB) and after it finished going through the motions, I logged in to have a look and now the volume has disappeared and an error saying "Remove inactive volumes to use the disk. Disk #2,3,4. The 3 drives are also shaded in red but not showing any errors on them. Any help would be much appreciated Are you certain you replaced the correct disk? Try downloading the full log zip file, and look in there for clues.

Are you seeing details on when the disk failed in system.log or kernel.log? Also, details on when you removed it and replaced it? There should also be some information on resyncing (and including errors on why the resyncing failed).

tez7171 wrote: Is it ok to send you the logs as I don't know what I would be looking at anyway. I can take a look. Put the entire log zip into cloud storage (dropbox, google drive, icloud, etc). Then send me a PM using the envelope icon in the upper right of the forum page. Put the download link in the PM

tez7171 wrote: PM sent Unfortunately the logs have rotated, so there isn't as much information as I'd hoped for. I'm not seeing any new disks in the NAS - currently there is Device: sda Channel: 0 Model: WDC WD30EFRX-68EUZN0 Serial: WD-WCC4N3AKAA6U Power-On Hours: 56938 Device: sdb Channel: 1 Model: WDC WD30EFRX-68EUZN0 Serial: WD-WCC4N5CCAU1H Power-On Hours: 55749 Device: sdc Channel: 2 Model: WDC WD30EFRX-68EUZN0 Serial: WD-WCC4N4RK37ZV Power-On Hours: 49637 Device: sdd Channel: 3 Model: WDC WD30EFRX-68EUZN0 Serial: WD-WCC4N3ZX9CP9 Power-On Hours: 49638 sda (first slot) has definitely failed - kernel.log is loaded with errors Mar 04 20:18:38 JONES kernel: sd 0:0:0:0: [sda] tag#11 Add. Sense: Unrecovered read error - auto reallocate failed Mar 04 20:18:38 JONES kernel: blk_update_request: I/O error, dev sda, sector 9437257 sdb (second slot) is out-of-sync with the others. Is this the old disk you put back? Mar 04 20:15:36 JONES kernel: md: kicking non-fresh sdb3 from array! Mar 04 20:15:36 JONES kernel: md/raid:md127: device sdd3 operational as raid disk 2 Mar 04 20:15:36 JONES kernel: md/raid:md127: device sdc3 operational as raid disk 3 Mar 04 20:15:36 JONES kernel: md/raid:md127: not enough operational devices (2/4 failed) That combination (sda failed and sdb out of sync) is why the array didn't mount. There is also some evidence that the resync (called a resilver in volume.log) did not complete === maintenance history ===device operation start_time end_time result details data disk test 2023-02-18 08:26:11 data disk test 2023-02-18 13:08:32 2023-02-18 13:08:42 pass data resilver 2023-03-03 08:21:29 Note that the resilver lists a start time, but not a completion time. As far as what to do - If you have a backup, then replacing disk 1 and doing a factory reset is the best path. If you don't, it might be possible to forcibly add sdb to the array. Depending on how old it is, there could be some data loss/corrupted files.

This is risky, and you are on your own if you attempt this. Other options you have are to use data recovery software (connecting the disks to a Windows PC) get a data recovery contract with Netgear use some other data recovery service These options have less risk, but will cost. (a) ReclaiMe data recovery software sells for about $200, and you'd likely also need 4-disk enclosure for 4 disks- at least $100 more. Plus you'd need storage to off-load the data. https://www.reclaime.com/default.aspx (b) Netgear's data recovery service starts with a $200 fee, after that there is an hourly charge. https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service Start by booting the NAS into tech support mode using the boot menu. Instructions are on pages 74-75 here: https://www.downloads.netgear.com/files/GDC/READYNAS-100/ReadyNAS_%20OS6_Desktop_HM_EN.pdf Note this should be done with slot 1 empty. Next you will need to access the NAS using Telnet. If you are using a windows PC, I suggest you use the Putty client for that. https://www.chiark.greenend.org.uk/~sgtatham/putty/ When you connect to the NAS, log in as root. The password is infr8ntdebug. Once logged in, enter these commands. (Don’t enter the # part, that is just the prompt the NAS will give you). # rnutil chroot # mdadm --assemble --really-force /dev/md127 /dev/sd[abcd]3 # btrfs device scan # btrfs fi show # mount /dev/md127 /data # ls /data If you get an error on any of these, post back what you are seeing on the screen before proceeding. If this works, the last command will give you a listing of the folders in your data volume (e.g., the shares). If you see that, then power down the NAS and then power it up normally.

RN314 no volume exists after disk replacement

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StephenB
Guru - Experienced User
Mar 04, 2023
tez7171 wrote:

Hi all, recently my NAS was showing "degrading" on the front panel. I logged in to the NAS and found out it was Disk 1 on the way out so I replaced it with a larger 4Tb disk (from 3TB) and after it finished going through the motions, I logged in to have a look and now the volume has disappeared and an error saying "Remove inactive volumes to use the disk. Disk #2,3,4. The 3 drives are also shaded in red but not showing any errors on them. Any help would be much appreciated

Are you certain you replaced the correct disk?

Try downloading the full log zip file, and look in there for clues.
- tez7171
  Aspirant
  Mar 04, 2023
  I downloaded the log files and looked in disk_info and doesn't appear to be any errors only a "Current Pending Sector Count :1" on channel 1
  
  Health data
  ATA Error Count: 0
  Reallocated Sectors: 0
  Reallocation Events: 0
  Spin Retry Count: 0
  Current Pending Sector Count: 1
  Uncorrectable Sector Count: 0
  Temperature: 37
  Start/Stop Count: 4492
  Power-On Hours: 55749
  Power Cycle Count: 98
  Load Cycle Count: 4677
  
  The other 3 are as below
  
  Health data
  ATA Error Count: 0
  Reallocated Sectors: 0
  Reallocation Events: 0
  Spin Retry Count: 0
  Current Pending Sector Count: 0
  Uncorrectable Sector Count: 0
  Temperature: 33
  Start/Stop Count: 1411
  Power-On Hours: 49638
  Power Cycle Count: 82
  Load Cycle Count: 1576
  - StephenB
    Guru - Experienced User
    Mar 04, 2023
    Are you seeing details on when the disk failed in system.log or kernel.log?
    
    Also, details on when you removed it and replaced it?
    
    There should also be some information on resyncing (and including errors on why the resyncing failed).

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RN314 no volume exists after disk replacement

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