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HDD error message ever since installing a non identical disk ?
hey guys i have been receiving emailed error messages on a disk ever since it was installed (5-6 years ago). The disk is almost identical to the other 5 (4TB) Seagate discs. i.e. 5 x ST4000VN000-1...
xlr8r wrote:
is it safe to do so even though I am not getting any "degraded raid messages" on the NAS.
Yes, you can just hot-swap the disk.
Netgear does recommend making sure your backup is up-to-date first, as the array isn't protected during the resync. So errors with one of the existing disks during that process will result in data loss.
xlr8r wrote:
(does new drive need formatted first?)
No. And if it is pre-formatted, you will need to format in the NAS before it will add it to the array.
Personally I do test the disks before I add them (using Seatools in the case of Seagate disks). I run the full generic test, followed by the full erase test (which is a bit tricky to get to with Seatools). I'd strongly recommend doing that with a recertified drive.
thanks StephenB
i had actually ran the disk test from the cog wheel in Volumes but i expected it to appear in the logs, but unless ive missed it, it doesnt ?
I do recall seeing a popup screen showing it was doing the tests , but i just closed it thinking it was doing it in the background...? Should the window have been kept open for the duration of the tests ?
i did see the LCD display messages that the tests were in progress and then completed. Should a log have been produced ?
please advise thanks
ps.The VN (Ironwolf) model in the UK is at least twice the US price.... :(
xlr8r wrote:
I do recall seeing a popup screen showing it was doing the tests , but i just closed it thinking it was doing it in the background...? Should the window have been kept open for the duration of the tests ?
It's fine to close the window. There should be a completion message in the logs. If the test fails, it will say so, if there is just a completion then it passed. The test does take a while, and since it is a background operation it will take longer if the NAS is in active use.
One aspect here is that different people have different views about when a disk is "failing". There is no real standard here. I replace disks when I see cmd counts and reallocated+pending sectors start to suddently rise, or when the reallocated+pending sector count reaches the 20s. I'll also replace them if I see recurring errors, even if the SMART stats aren't rising. Others will use different thresholds (some stricter, others more relaxed).
Another is that tests do miss stuff. Before I install a new drive, I test it by running a full non-destructive test, followed by a full erase test. I'll confirm problems when I take a disk out of service using the same tests. With Seagate disks, I use Seatools for these tests. Sometimes the erase test will fail when the non-destructive test passes - and I've also seen the opposite (where the erase passes but the non-destructive test fails).
If you have SSH enabled, you could try
smartctl -x /dev/sdf
That will give you a lot more information than you'll find in the logs. That includes an error log, which will give you some idea about when the errors occured. That can help in understanding if the disk is stable or not. Note that this error log is kept by the disk itself - that is why the times are given in power-on hours.
cheers
based on your earlier post, i gave Seagate a call on their online chat, and a very helpful lady there decided to RMA the disk even though way out of warranty!!
it wont be an exact match replacement, nor could she offer the VN000, but said it would be a new 4TB. I suppose what i could do it now buy a VN000 and resell the drive seagate send me....
meantime, i will also check your suggestions using SSH for more info
many thanks
StephenB
a question on replacing the failing drive, with a new drive. (RAID 5)
is it safe to do so even though I am not getting any "degraded raid messages" on the NAS. I know this can have adverse effects doing so on the Synology NAS, does same rule apply to Netgear NAS ?
....or do i simply yank out the offending drive from my nas while powered up and replace it , and wait ? (does new drive need formatted first?)
thanks
xlr8r wrote:
is it safe to do so even though I am not getting any "degraded raid messages" on the NAS.
Yes, you can just hot-swap the disk.
Netgear does recommend making sure your backup is up-to-date first, as the array isn't protected during the resync. So errors with one of the existing disks during that process will result in data loss.
xlr8r wrote:
(does new drive need formatted first?)
No. And if it is pre-formatted, you will need to format in the NAS before it will add it to the array.
Personally I do test the disks before I add them (using Seatools in the case of Seagate disks). I run the full generic test, followed by the full erase test (which is a bit tricky to get to with Seatools). I'd strongly recommend doing that with a recertified drive.
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