On Wed, 28 Mar 2012 12:49:18 +0000 "Paramasivam, Meenakshisundaram" <mparamas@xxxxxxxxx> wrote: > [root@in-rady-neuro9 ~]# df -kl /myarray > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/md2 11537161976 162432 10950945196 1% /myarray > Should be 7TB of used space. This is bad. Something has happened to your filesystem. It is almost as though someone ran "mkfs" on the array. I don't know much about recovery after such an action, but I doubt you will get much back. > > [root@in-rady-neuro9 ~]# cat /proc/partitions > major minor #blocks name > > 8 0 438960128 sda > 8 1 512000 sda1 > 8 2 51200000 sda2 > 8 3 387247104 sda3 > 8 16 1953514584 sdb > 8 32 1953514584 sdc > 8 48 1953514584 sdd > 8 64 1953514584 sde > 8 80 1953514584 sdf > 8 96 1953514584 sdg > 8 112 1953514584 sdh > 8 128 1953514584 sdi > 253 0 346226688 dm-0 > 253 1 40992768 dm-1 No md2 ??? > > sd[b-i] are raid devices > > [root@in-rady-neuro9 ~]# mdadm --detail /dev/md2 > /dev/md2: > Version : 0.90 > Creation Time : Fri Dec 16 17:56:14 2011 > Raid Level : raid6 > Array Size : 11721086976 (11178.10 GiB 12002.39 GB) > Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) <<<====== Wrong! Should be 7TB of used array space. "Used Dev Size" isn't "how much of the array is used by the filesystem" - mdadm doesn't know anything about filesystems. It is "How much of each individual device is used by the array", which is usually a little less than the size of the smallest device. So 2TB is correct here. NeilBrown
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