Re: Questionable Status

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Tony Nelson wrote:
On 09-09-23 09:29:56, Gene Poole wrote:
I've very recently upgraded 2 of my machines.  One machine was
upgraded from Fedora 9 to Fedora 11, and the other machine was upgraded from Fedora 10 to Fedora 11. On machine 1 I have 2-hard disks (both Seagate's - 500 GB and 1000 GB), on machine 2 I have 1- hard disk (Western Digital 320 GB). All of the interfaces are SATA. The questionable status is that on machine 1 the 500 GB drive is showing as failing and on machine 2 the 20 GB drive is showing as failing. Neither drive, under the old releases, showed up as failing. How do I know that these drive are truly failing?

1) Wait.  If the disk is going bad, it will fail.

2) Run as root `smartctl -A /dev/sdx` (for each sdx) and look at the "WHEN_FAILED" column; it will be "-" if not failed.

3) Run as root `smartctl -a /dev/sdx` (for each sdx) and look at the whole output.

4) Run as root `smartctl -t long /dev/sdx` (for each sdx) and wait until the time the test should finish, then view the results with `smartctl -l selftest /dev/sdx` (for each sdx) or `smartctl -a /dev/
sdx` (for each sdx).

See `man smartctl`.

Note that the new disk health monitoring tool "palimpsest" in package gnome-disk-utility is panicky and not to be trusted, unless you like buying lots of hard drives. It doesn't just look at "WHEN_FAILED", but has its own criteria such as nonzero Reallocated_Event_Count, which is fairly normal for a modern drive that has been in use for a while. A nonzero Current_Pending_Sector or Offline_Uncorrectable are bad, as they mean data loss, though not general drive failure. I recommend enabling Automatic Offline Testing with `smartctl -o on /dev/sdx` (for each sdx), which will do a surface scan every few hours, giving the
best chance to repair or recover any sectors that are going bad.


Will the `smartctl -o on /dev/sdx` (for > each sdx), fix the nonzero Reallocated_Event_Count issue on RAID arrays in a non-desctructive way? Do you have to use the /dev/sdx devices or the /dev/md devices?

Good pointers in the mean time.

--
Robin Laing

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