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Full Discussion: mdadm unable to fail a resyncing drive?
Homework and Emergencies Emergency UNIX and Linux Support mdadm unable to fail a resyncing drive? Post 302547097 by Bashingaway on Saturday 13th of August 2011 10:08:08 PM
Old 08-13-2011
Quote:
Originally Posted by otheus
Though I always found md to be stable, the Linux world seems to have fixated on the much more flexible (and thoroughly documented) Volume Management (LVM) tools. Should you recover, consider a rebuild with LVM. There are more steps and there is a learning curve involved, but these are
Outweighed by the ability to get support.
Excepting LVM is more about volume management and less about resilience, LVM does not AFAIK have the tools to setup a RAID5 or RAID6 environment. Instead you'd have to build LVM on top of RAID which in my opinion leads to a new level of complexity if you need to do a recovery.

LVM is good for environments where you might have lots of data spread over lots of disks, however where you need your data to be as safe as practicable with reasonably efficient usage of drives RAID5 or RAID6 is probably the way to go.

Anyways I managed to get the RAID array back up, copied the data off it, got another drive to allow me to make the array RAID6 and re created a new RAID6 array. I'm currently copying 9TB back onto the array.
 

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LEARN ABOUT DEBIAN

pvck

PVCK(8) 						      System Manager's Manual							   PVCK(8)

NAME

       pvck - check physical volume metadata

SYNOPSIS

       pvck [-d|--debug] [-h|--help] [-v|--verbose] [--labelsector] PhysicalVolume [PhysicalVolume...]

DESCRIPTION

       pvck checks physical volume LVM metadata for consistency.

OPTIONS

       See lvm for common options.

       --labelsector sector
	      By  default, 4 sectors of PhysicalVolume are scanned for an LVM label, starting at sector 0.  This parameter allows you to specify a
	      different starting sector for the scan and is useful for recovery situations.  For example, suppose the partition table is corrupted
	      or  lost	on  /dev/sda, but you suspect there was an LVM partition at approximately 100 MB.  This area of the disk may be scanned by
	      using the --labelsector parameter with a value of 204800 (100 * 1024 * 1024 / 512 = 204800):

	      pvck --labelsector 204800 /dev/sda

	      Note that a script can be used with --labelsector to automate the process of finding LVM labels.

SEE ALSO

       lvm(8), pvcreate(8), pvscan(8) vgck(8)

Sistina Software UK					 LVM TOOLS 2.02.95(2) (2012-03-06)						   PVCK(8)
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