[CentOS] C7, mdadm issues

[mark]

Alessandro Baggi wrote:
> Il 29/01/19 18:47, mark ha scritto:
>> Alessandro Baggi wrote:
>>> Il 29/01/19 15:03, mark ha scritto:
>>>
>>>> I've no idea what happened, but the box I was working on last week
>>>> has a *second* bad drive. Actually, I'm starting to wonder about
>>>> that particulare hot-swap bay.
>>>>
>>>> Anyway, mdadm --detail shows /dev/sdb1 remove. I've added
>>>> /dev/sdi1...
>>>> but see both /dev/sdh1 and /dev/sdi1 as spare, and have yet to find
>>>> a reliable way to make either one active.
>>>>
>>>> Actually, I would have expected the linux RAID to replace a failed
>>>> one with a spare....

>>> can you report your raid configuration like raid level and raid devices
>>> and the current status from /proc/mdstat?
>>>
>> Well, nope. I got to the point of rebooting the system (xfs had the
>> RAID
>> volume, and wouldn't let go; I also commented out the RAID volume.
>>
>> It's RAID 5, /dev/sdb *also* appears to have died. If I do
>> mdadm --assemble --force -v /dev/md0  /dev/sd[cefgdh]1 mdadm: looking for
>> devices for /dev/md0 mdadm: /dev/sdc1 is identified as a member of
>> /dev/md0, slot 0.
>> mdadm: /dev/sdd1 is identified as a member of /dev/md0, slot -1.
>> mdadm: /dev/sde1 is identified as a member of /dev/md0, slot 2.
>> mdadm: /dev/sdf1 is identified as a member of /dev/md0, slot 3.
>> mdadm: /dev/sdg1 is identified as a member of /dev/md0, slot 4.
>> mdadm: /dev/sdh1 is identified as a member of /dev/md0, slot -1.
>> mdadm: no uptodate device for slot 1 of /dev/md0
>> mdadm: added /dev/sde1 to /dev/md0 as 2
>> mdadm: added /dev/sdf1 to /dev/md0 as 3
>> mdadm: added /dev/sdg1 to /dev/md0 as 4
>> mdadm: no uptodate device for slot 5 of /dev/md0
>> mdadm: added /dev/sdd1 to /dev/md0 as -1
>> mdadm: added /dev/sdh1 to /dev/md0 as -1
>> mdadm: added /dev/sdc1 to /dev/md0 as 0
>> mdadm: /dev/md0 assembled from 4 drives and 2 spares - not enough to
>> start the array.
>>
>> --examine shows me /dev/sdd1 and /dev/sdh1, but that both are spares.
> Hi Mark,
> please post the result from
>
> cat /sys/block/md0/md/sync_action

There is none. There is no /dev/md0. mdadm refusees, saying that it's lost
too many drives.

      mark