My Synology NAS has reported a 'deteriorated volume' - basically, a broken disc. It then checks the 4TB disk sector by sector, which takes at least a day, reports it healthy, and after a few days, once the system has rebuilt from the RAID, the disk is back to deteriorated. And round we go. The other 4TB is fine, and has a copy of the data (backed up elsewhere - it's not what I'd call critical).
Is the problem really the disc? Or is Synology software especially critical?
I was wondering if there's some form of diagnostic I could do either on the Synology, or I can plug it in to a PC, that gives me some information about what the problem might be.
I've got as far as I can with Synology's apps, logs and utilities - they don't
seem to say anything more than healthy/deteriorated.
Is the problem really the disc? Or is Synology software especially critical?
I was wondering if there's some form of diagnostic I could do either on the Synology, or I can plug it in to a PC, that gives me some information about what the problem might be.
My Synology NAS has reported a 'deteriorated volume' - basically, a broken disc. It then checks the 4TB disk sector by sector, which takes at least a day, reports it healthy, and after a few days, once the system has rebuilt from the RAID, the disk is back to deteriorated. And round we go. The other 4TB is fine, and has a copy of the data (backed up elsewhere - it's not what I'd call critical).
Is the problem really the disc? Or is Synology software especially critical?
RJH <patchmoney@gmx.com> wrote:
My Synology NAS has reported a 'deteriorated volume' - basically, a broken >> disc. It then checks the 4TB disk sector by sector, which takes at least a >> day, reports it healthy, and after a few days, once the system has rebuilt >> from the RAID, the disk is back to deteriorated. And round we go. The other >> 4TB is fine, and has a copy of the data (backed up elsewhere - it's not what >> I'd call critical).
Is the problem really the disc? Or is Synology software especially critical?
It's not anything related to this, perchance? https://arstechnica.com/gadgets/2023/06/clearly-predatory-western-digital-sparks-panic-anger-for-age-shaming-hdds/
Theo
In article <u6ui7f$2qtlv$1@dont-email.me>, RJH wrote...
My Synology NAS has reported a 'deteriorated volume' - basically, a broken >> disc. It then checks the 4TB disk sector by sector, which takes at least a >> day, reports it healthy, and after a few days, once the system has rebuilt >> from the RAID, the disk is back to deteriorated. And round we go. The other >> 4TB is fine, and has a copy of the data (backed up elsewhere - it's not what >> I'd call critical).
Is the problem really the disc? Or is Synology software especially critical? >>
I was wondering if there's some form of diagnostic I could do either on the >> Synology, or I can plug it in to a PC, that gives me some information about >> what the problem might be.
I've got as far as I can with Synology's apps, logs and utilities - they don't
seem to say anything more than healthy/deteriorated.
Given the timescales you're facing, I think it would be well worth-while plugging the disk into a PC and running a SMART monitor on it. Here's a list of untilities I've noted:
PassMark: Free for personal use
Acronis Drive Monitor@ Free, but showing its age
HD Sentinel: Paid
HDTune: Basic version free for personal use.
smartmontools: Free; gui available
CrystalDiskInfo: Free. Video
Such tools have saved my bacon many times, flagging up a deteriorating volume while there's still enough time to recover everything on it. The one I use now
is HD Sentinel, which is paid, but good value. https://www.hdsentinel.com/
On 21 Jun 2023 at 17:12:11 BST, Theo wrote:
RJH <patchmoney@gmx.com> wrote:
My Synology NAS has reported a 'deteriorated volume' - basically, a broken >>> disc. It then checks the 4TB disk sector by sector, which takes at least a >>> day, reports it healthy, and after a few days, once the system has rebuilt >>> from the RAID, the disk is back to deteriorated. And round we go. The other >>> 4TB is fine, and has a copy of the data (backed up elsewhere - it's not what
I'd call critical).
Is the problem really the disc? Or is Synology software especially critical?
It's not anything related to this, perchance?
https://arstechnica.com/gadgets/2023/06/clearly-predatory-western-digital-sparks-panic-anger-for-age-shaming-hdds/
Theo
Mmmm. Possibly. It's a WD DC HC320 (it's 8TB, not 4, my bad) and a quick search suggests that it does have WDDA, and it's Dec 2019. So well in the realm of a possibility.
I'll take a look later - thanks
On 22 Jun 2023 at 09:08:36 BST, "RJH" <patchmoney@gmx.com> wrote:
While digging, the Synology SMART logs show no bad sectors, although I don't >> undestand a number of the measurements
Post the table of results here, should be able to interpret it.
Cheers - Jaimie
While digging, the Synology SMART logs show no bad sectors, although I don't undestand a number of the measurements
On 22 Jun 2023 at 09:58:39 BST, Jaimie Vandenbergh wrote:
On 22 Jun 2023 at 09:08:36 BST, "RJH" <patchmoney@gmx.com> wrote:
While digging, the Synology SMART logs show no bad sectors, although I don't
undestand a number of the measurements
Post the table of results here, should be able to interpret it.
Cheers - Jaimie
Be good if you could, thanks. I couldn't copy/paste the data - here's a screenshot:
https://www.icloud.com/sharedalbum/#B0zGhtLJ3GMxwP9
On 22 Jun 2023 at 10:08:48 BST, "RJH" <patchmoney@gmx.com> wrote:
On 22 Jun 2023 at 09:58:39 BST, Jaimie Vandenbergh wrote:
On 22 Jun 2023 at 09:08:36 BST, "RJH" <patchmoney@gmx.com> wrote:
While digging, the Synology SMART logs show no bad sectors, although I don't
undestand a number of the measurements
Post the table of results here, should be able to interpret it.
Cheers - Jaimie
Be good if you could, thanks. I couldn't copy/paste the data - here's a
screenshot:
https://www.icloud.com/sharedalbum/#B0zGhtLJ3GMxwP9
Gosh, it's nice when it's not a Seagate who obfuscate their raw values
:)
The ones to watch for are:
5 Reallocated sector count (0)
- how many sectors have been reallocated from the spare sectors pool to replace dead ones
7 Seek error rate (0)
- how often seeking screws up, would indicate dodgy arm/tracking
mechanism
194 Temperature (37C)
- the obvious. Looks like 37C is also the max it's been, probably, since value and worst are the same figure.
196 Reallocated event count (0)
- Something like 5, not entirely sure the diff but you want it to be
zero
197 Current pending sector (0)
- Count of suspiciously dubious sectors that might get worse and need reallocating soon
198 Offline uncorrectable (0)
- Just plain fucked sector count
199 UDMA CRC error count (0)
- Bad cabling/sockets or high RF interference causing cable bit errors
All those are fine! So it's quite likely to be the WD firmware lying
thing.
All went well for a day or so - rebuilt, and while recompiling the Plex index 'volume degraded' again - same drive, but this time described as 'drive crashed'. So there's probably something else going on either with the drive, or the NAS (which must be over 10 years old now, with several of those 24/7).
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