volume degraded

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Hi,&nbsp;I took over our ReadyNAS environment and one ReadyNAS is in degraded state.It's configured in RAID 6.&nbsp;First such error was: "Volume: volume data health changed from Redundant to Degraded"it's followed by numerous "Volume: volume data is Degraded."&nbsp;When I go to System &gt; Volume, it shows all drives are green and when I mouse over each one of them, they all say ONLINE.&nbsp;I downloaded the logs and found in&nbsp;mdstat.log:/dev/md/data-0:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Version : 1.2&nbsp; Creation Time : Thu Nov 19 22:47:03 2015&nbsp;&nbsp;&nbsp;&nbsp; Raid Level : raid6&nbsp;&nbsp;&nbsp;&nbsp; Array Size : 39021667840 (37213.96 GiB 39958.19 GB)&nbsp; Used Dev Size : 3902166784 (3721.40 GiB 3995.82 GB)&nbsp;&nbsp; Raid Devices : 12&nbsp; Total Devices : 12&nbsp;&nbsp;&nbsp; Persistence : Superblock is persistent&nbsp;&nbsp;&nbsp;&nbsp; Update Time : Tue Mar 20 14:33:49 2018&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; State : clean, degraded&nbsp;Active Devices : 11Working Devices : 11&nbsp;Failed Devices : 1&nbsp; Spare Devices : 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Layout : left-symmetric&nbsp;&nbsp;&nbsp;&nbsp; Chunk Size : 64K&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Name : 43f68b06:data-0&nbsp; (local to host 43f68b06)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UUID : e92dd329:1a6ad005:49d51ef6:3035aab6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Events : 2419044&nbsp;&nbsp;&nbsp;&nbsp; Number&nbsp;&nbsp; Major&nbsp;&nbsp; Minor&nbsp;&nbsp; RaidDevice State&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sda3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 35&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdc3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 19&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdb3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 51&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdd3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 67&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sde3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 83&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdf3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 115&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdh3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 99&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdg3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 131&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdi3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 147&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdj3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 179&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; active sync&nbsp;&nbsp; /dev/sdl3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 22&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 22&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; removed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 195&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; faulty&nbsp;&nbsp; /dev/sdm3&nbsp;My questions are:1. What exactly is the issue here? partition sdm3 is corrupted? How to fix this kind of errors?2. I have no idea how long this ReadyNAS has been arouond. Is it something I can buy a drive and replace it? I registered the product and it requires purchase date but I don't have that info. How do I know it's under warranty or not?&nbsp;thanks,

StephenB · Answer

What do you see in disk_info.log and smart_history.log for that disk?

acng · Answer

Hi,I don't see anything unusual for sdm in the disk_info.log:&nbsp;Device:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sdmController:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0Channel:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3Model:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; WDC WD4000F9YZ-09N20L1Serial:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; WD-WCC5D0HH7DHHFirmware:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 01.01A02Class:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SATARPM:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7200Sectors:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7814037168Pool:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dataPoolType:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RAID 6PoolState:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3PoolHostId:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 43f68b06Health data&nbsp; ATA Error Count:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; Reallocated Sectors:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; Reallocation Events:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; Spin Retry Count:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; Current Pending Sector Count:&nbsp;&nbsp; 0&nbsp; Uncorrectable Sector Count:&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; Temperature:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 41&nbsp; Start/Stop Count:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp; Power-On Hours:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16538&nbsp; Power Cycle Count:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp; Load Cycle Count:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;and no error in smart_history.log:model&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; serial&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; realloc_sect&nbsp; realloc_evnt&nbsp; spin_retry_cnt&nbsp; ioedc&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; cmd_timeouts&nbsp; pending_sect&nbsp; uncorrectable_err&nbsp; ata_errors&nbsp; timestamp&nbsp;&nbsp; time&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;--------------------&nbsp; --------------------&nbsp; ------------&nbsp; ------------&nbsp; --------------&nbsp; ----------&nbsp; ------------&nbsp; ------------&nbsp; -----------------&nbsp; ----------&nbsp; ----------&nbsp; -------------------WDC WD4000F9YZ-09N20&nbsp; WD-WCC5D0HH7DHH&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1448002169&nbsp; 2015-11-20 06:49:29&nbsp;However, there have been bunch of errors for sdm in messages.log file.&nbsp;I have a tough time attaching the messages.log file. Tried messages.log, messages.txt, and even converted to pdf. Will try attach again after this post.&nbsp;Please advise. Thanks,&nbsp;

acng · Answer

Please see attached.

StephenB · Answer

I suggest powering down the NAS, and then testing sdm in a Windows PC with Western Digital's lifeguard program.

acng · Answer

Thanks but this NAS is at a remote site so it's a bit difficult to do at this moment.&nbsp;I also found in kernel.log, there are alot of entries like below logged every second. Does it pretty much imply the disk is due to be replaced?&nbsp;~~~~~~Mar 20 14:34:02 ut-backup03 kernel: blk_update_request: I/O error, dev sdm, sector 9437257Mar 20 14:34:02 ut-backup03 kernel: Buffer I/O error on dev sdm3, logical block 1, async page readMar 20 14:34:02 ut-backup03 kernel: ata8: EH completeMar 20 14:34:02 ut-backup03 kernel: ata8.00: exception Emask 0x0 SAct 0x2000040 SErr 0x0 action 0x0Mar 20 14:34:02 ut-backup03 kernel: ata8.00: irq_stat 0x40000008Mar 20 14:34:02 ut-backup03 kernel: ata8.00: failed command: READ FPDMA QUEUEDMar 20 14:34:02 ut-backup03 kernel: ata8.00: cmd 60/08:30:48:00:90/00:00:00:00:00/40 tag 6 ncq 4096 inMar 20 14:34:02 ut-backup03 kernel:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; res 41/40:00:49:00:90/00:00:00:00:00/40 Emask 0x409 (media error) &lt;F&gt;Mar 20 14:34:02 ut-backup03 kernel: ata8.00: status: { DRDY ERR }Mar 20 14:34:02 ut-backup03 kernel: ata8.00: error: { UNC }Mar 20 14:34:02 ut-backup03 kernel: ata8.00: configured for UDMA/133Mar 20 14:34:02 ut-backup03 kernel: sd 8:0:0:0: [sdm] tag#6 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSEMar 20 14:34:02 ut-backup03 kernel: sd 8:0:0:0: [sdm] tag#6 Sense Key : Medium Error [current] [descriptor]Mar 20 14:34:02 ut-backup03 kernel: sd 8:0:0:0: [sdm] tag#6 Add. Sense: Unrecovered read error - auto reallocate failedMar 20 14:34:02 ut-backup03 kernel: sd 8:0:0:0: [sdm] tag#6 CDB: Read(16) 88 00 00 00 00 00 00 90 00 48 00 00 00 08 00 00Mar 20 14:34:02 ut-backup03 kernel: blk_update_request: I/O error, dev sdm, sector 9437257Mar 20 14:34:02 ut-backup03 kernel: Buffer I/O error on dev sdm3, logical block 1, async page readMar 20 14:34:02 ut-backup03 kernel: ata8: EH completeMar 20 14:34:02 ut-backup03 kernel: BTRFS: could not find root 8Mar 20 14:34:02 ut-backup03 kernel: BTRFS: could not find root 8&nbsp;~~~~~~thanks.

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volume degraded

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