[Lustre-discuss] lustre remounting after e2fsck

Samuel Aparicio saparicio at bccrc.ca
Fri Jul 6 10:58:49 PDT 2012

I just recovered an OST from a disk crash with e2fsck.
however when i try to remount as a lustre filesystem disk I get the following:

[root at ost3 ~]#  e2fsck -p -j /dev/etherd/e9.24p3 /dev/md142
lustre2-OST0009: Superblock hint for external superblock should be 0x109893.  FIXED.
lustre2-OST0009: clean, 948931/28615936 files, 6134439/3662831360 blocks
[root at ost3 ~]# mount -t lustre /dev/md142 /mnt/ost142
mount.lustre: mount /dev/md142 at /mnt/ost142 failed: No such file or directory
Is the MGS specification correct?
Is the filesystem name correct?
If upgrading, is the copied client log valid? (see upgrade docs)

I presume I need to re-add something back here … but what … ?

dumpe2fs reports the following:

dumpe2fs 1.41.90.wc4 (01-Sep-2011)
Filesystem volume name:   lustre2-OST0009
Last mounted on:          /
Filesystem UUID:          2df99747-3c27-4795-abf5-c24a212edde3
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              28615936
Block count:              3662831360
Reserved block count:     183141568
Free blocks:              3656696921
Free inodes:              27667005
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      149
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         256
Inode blocks per group:   16
RAID stride:              64
RAID stripe width:        320
Flex block group size:    256
Filesystem created:       Wed Mar 28 11:47:49 2012
Last mount time:          Fri Jul  6 10:54:07 2012
Last write time:          Fri Jul  6 10:54:07 2012
Mount count:              1
Maximum mount count:      20
Last checked:             Thu Jul  5 22:12:16 2012
Check interval:           0 (<none>)
Lifetime writes:          63 GB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:	          256
Required extra isize:     28
Desired extra isize:      28
Journal UUID:             de0081bb-52a1-4970-b66c-08c13cbba8c7
Journal device:	          0x109893
Default directory hash:   half_md4
Directory Hash Seed:      e34cbe13-406b-49e2-995d-52ff289120c8
Journal backup:           inode blocks

Professor Samuel Aparicio BM BCh PhD FRCPath
Nan and Lorraine Robertson Chair UBC/BC Cancer Agency
675 West 10th, Vancouver V5Z 1L3, Canada.
office: +1 604 675 8200 lab website http://molonc.bccrc.ca

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