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Homework and Emergencies Emergency UNIX and Linux Support mdadm unable to fail a resyncing drive? Post 302545570 by Bashingaway on Tuesday 9th of August 2011 04:13:14 PM
Old 08-09-2011
mdadm unable to fail a resyncing drive?

Hi All

I have a RAID 5 array consisting of 4 drives that had a partial drive failure in one of the drives.

Rebooting shows the faulty drive as background rebuilding and mdadm /dev/ARRAYID shows three drives as in sync with the fourth drive as spare rebuilding.

However the array won't come online instead reporting itself as active, degraded, not started

I want to take the faultyesque drive out of the array as smartctl shows it as just about to fail with a reallocated sectors problem.

I've executed a stop on the array but I can't fail the faulty drive as it just reports "No such device" however mdadm -E /dev/thatdrive reports it belonging to the array and mdadm -D /dev/thatarray shows the drive in the array but with thatdrive as "spare rebuilding".

I've read assorted stuff on this for the last 7-8 hours and short of physically pulling the drive out can't see a way to get the drive out of the array, I've even done a reboot to see if that helped with no effect.

What am I missing?

Thanks in advance.

---------- Post updated at 09:13 PM ---------- Previous update was at 03:25 AM ----------

No one has any ideas?

Wow that's scary how little depth of knowledge for mdadm there is out there.
 

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OCF_PACEMAKER_HEALTH(7) 				      Pacemaker Configuration					   OCF_PACEMAKER_HEALTH(7)

NAME
ocf_pacemaker_HealthSMART - SMART health status SYNOPSIS
OCF_RESKEY_state=string OCF_RESKEY_drives=string OCF_RESKEY_temp_lower_limit=string OCF_RESKEY_temp_upper_limit=string HealthSMART [start | stop | monitor | meta-data | validate-all] DESCRIPTION
Systhem health agent that checks the S.M.A.R.T. status of the given drives and updates the #health-smart attribute. SUPPORTED PARAMETERS
OCF_RESKEY_state = string [/var/run//health-smart-{OCF_RESOURCE_INSTANCE}.state] State file Location to store the resource state in. OCF_RESKEY_drives = string [sda] Drives to check The drives to check as a SPACE separated list. Enter only the part after the "/dev/" i.e. "sda". At the moment /dev/sda is hard coded. Sorry. OCF_RESKEY_temp_lower_limit = string [0] Lower limit for the temperature of the drive(s) Lower limit of the temperature in deg C of the drive(s). Below this limit there status will be red. The yellow limit is 5 deg C more than this value. OCF_RESKEY_temp_upper_limit = string [60] Upper limit for red smart attribute Upper limit of the temperature if deg C of the drives(s). If the drive reports a temperature higher than this value the status of #health-smart will be red. The yellow limit is 5 deg C below this value. AUTHOR
Andrew Beekhof <andrew@beekhof.net> Author. Pacemaker Configuration 07/05/2010 OCF_PACEMAKER_HEALTH(7)
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