Disk Failure Detected...

capaust wrote:

roger.armstrong wrote: Can anyone confirm the theory that reverting to 4.2.17 fixes the problem? Or that TimeMachine is to blame? I'm not sure about 4.2.17, but our problems with ST2000DL003 drives had nothing to do with Time Machine. We use our ReadyNAS as a file server and just having 25 employees accessing files at the same time caused drives to fail. As with many others here, a couple of resyncs and restarts would 'fix' the problem temporarily, but they would inevitably fail again. It appears that the problem has more to do with loads placed on the drives. Under regular daily use, they would fail intermittently, but I could consistently get them to fail if I ran a large file transfer using RichCopy.

I would concur with seeing this problem under high loads. I have seen the problem with TM and also with multiple concurrent large (+1gb) file transfers. TM does do a lot of disk access as there are a lot of very small (symlinked files). I also saw this multiple times when initially going from a new 4 disc volume (raid5) to a 6 disc (raid6). Enough to cause me to factory reset the unit and start again with a new 6 disc volume.

With the high current price of hard drives I'm hoping for a fix in firmware in the new year as I cannot afford to replace the existing drives yet.

Cheers
Ferg