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Forum Discussion
Drive four premature failure in two Ready NAS devices - Coincidence?
Hi, I've got a ReadyNAS 426 and ReadyNas 516. All six drives in each device the same size/model, however, one contained 6 x 10TB and the other 6 x 18TB. Both had a failure on drive four a...
Both had a failure on drive four after 36,000 and 49,000 hours.
So they failed between 4 and 6 years of operation (assuming both NAS are running 24x7). Doesn't sound like a "massive" coincidence to me.
What are your usual drive temps? Particularly the 18 TB setup, since larger drives generally use more power.
Do you have a maintenance schedule set up on the two NAS? That can help uncover drive failures sooner, making it less likely that you will lose the volumes.
It was more the fact both failed drives were in the same bay in each chassis, with possibility the drives in that specifc bay work 'harder'?
No, I don't have any scheduled maintenance.
It was more the fact both failed drives were in the same bay in each chassis, with possibility the drives in that specifc bay work 'harder'?
Yes, I saw it was the same bay. If all bays are used, then the odds of this (specifically in bay 4) happening by random chance are 1 in 36. The odds of two successive failures happening in the same bay (not specific to bay 4) are 1 in 6. So not really "massive" in my view.
The RAID modes used by both your NAS will spread the I/O load evenly across the drives in the volume, so none are working "harder".
Still worth checking the temps while exercising the disks, to make sure everything is ok there. Poor ventilation might result in higher temps in some bays. That could reduce longevity of disks in the affected bays. If the disks are the same model, then the temps should be fairly close.
No, I don't have any scheduled maintenance.
I suggest you set up a schedule. Generally drive failures are only detected when a bad area on the drives are written or read. A lot of the data in large volumes is only rarely accessed, so failures in those sectors can take a really long time to uncover. When they finally do turn up, often multiple drives have errors - which generally does result in data loss.
Personally I run one maintenance test a month on each volume - cycling through the tests 3x a year. The order I use it
- disk test
- balance
- scrub
- defrag
The disk test and scrub both access every sector of every drive, so the scrub also doubles as a disk test.
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