Reallocated sector count continues to climb

steve_i wrote:
So, the first thing I was wondering is, will the ReadyNAS use the parity data to recover the lost data when a sector is reallocated?

no data is lost with reallocated sectors, this happens internally to the drive, the nas is not aware or care (other than the smart messages) that sectors are remapped.

And the second thing is, is there any way to know whether or not a drive will fail the SeaTools test? Obviously it's not desirable to keep shutting the array down for 12 hours, plugging the drive into a PC and running the test. I could do that every day for a year and never have it flagged as failed, for all I know.

Erm, other than the obviously fatal errors, not really... if there was then there wouldn't be much point to seatools, eh?

Honestly, ALL disks fail sooner or later. If a disk is giving errors, it will fail sooner.

If would even consider shutting down an array to test a single disk for 12 hours, then your better off replacing and testing it offline or using it as a spare or put into something not as critical until it does fail.

Boog wrote: The ReadyNAS device informed me once the SMART threshold had been triggered. So by this, do you mean it gave you a different error message to the normal one saying the reallocated sector count has increased from x to y? It would certainly address my previous question if the ReadyNAS knows at what point SeaTools will consider the drive failed and sends a different error message at that point.

I don't know if there is a different message when you run out of re-allocated sector room, however do you really want to keep your data on a disk for that long of a period to find out?