smartd will happily log messages like this:
Sep 2 12:33:59 Watt smartd: Device: /dev/sda, 2 Offline uncorrectable sectors Sep 2 12:34:01 Watt smartd: Device: /dev/sdc, 16 Currently unreadable (pending) sectors Sep 2 12:34:01 Watt smartd: Device: /dev/sdc, 16 Offline uncorrectable sectors
These are all used for mdraid arrays, so it's easily fixable by having mdraid scrub the array. But that takes a good long while (and hurts performance while its going). It'd be much quicker to selectively scrub only the parts that need it.
Is there some way to get the list of pending sectors from the disk? I didn't see anything in
smartctl -x, but here is sda and sdc in case it helps. (And yes, sdc is destined for replacement soon.) If I could get a list of sectors, I could feed that to mdraid to scrub only those portions.
These are all SATA disks. The machine is running Debian testing/unstable, if it matters. But I'd love to solve this on machines running Debian stable and oldstable as well.