[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

[linux-lvm] Recreating logical volume



Hi all.  I have a RH AS 4 box with 4 H/W RAID array (sdb, sdc, sdd & sde).

All 4 raid arrays were in a single volume group (vg0) which was then made in to a single logical volume (lv0). Both sdb & sdd are now uncontactable (they don't even appear in fdisk).

I umounted the filesystem (/data) originally with the intend of running e2fsck on the filesystem (it's ext3). This failed and I attempted to remoun the filesystem but was unable to.

I used vgreduce --test --removemissing vg0 and as it looked good I went ahead and used vgreduce --removemissing vg0

Of course this has removed lv0.

If I use lvcreate -Zn on the remaining PVs: sdc & sde can I recover the logical volume and then go on to mount /data again?

Here is some data:

$sudo pvdisplay
Password:
  /dev/sdb: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdb1: read failed after 0 of 2048 at 0: Input/output error
  /dev/sdd: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdd1: read failed after 0 of 2048 at 0: Input/output error
  --- Physical volume ---
  PV Name               /dev/sdc1
  VG Name               vg0
  PV Size               1.64 TB / not usable 0
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              429149
  Free PE               429149
  Allocated PE          0
  PV UUID               i0kyjz-8U3i-fMCT-Trxs-vF7W-wnap-M4fBlP

  --- Physical volume ---
  PV Name               /dev/sde1
  VG Name               vg0
  PV Size               1.64 TB / not usable 0
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              429149
  Free PE               429149
  Allocated PE          0
  PV UUID               YR2tx7-PLFu-xAGJ-d4KP-RIW9-Nguh-KzjybH

$sudo vgdisplay
  /dev/sdb: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdb1: read failed after 0 of 2048 at 0: Input/output error
  /dev/sdd: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdd1: read failed after 0 of 2048 at 0: Input/output error
  --- Volume group ---
  VG Name               vg0
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  8
  VG Access             read/write
  VG Status             resizable
  MAX LV                256
  Cur LV                0
  Open LV               0
  Max PV                256
  Cur PV                2
  Act PV                2
  VG Size               3.27 TB
  PE Size               4.00 MB
  Total PE              858298
  Alloc PE / Size       0 / 0
  Free  PE / Size       858298 / 3.27 TB
  VG UUID               0MT3nn-xqM1-6ScL-XEM3-1Kyo-XDOp-SkhV8R


Thanks,

Rob

--
Robert Brockway B.Sc. email: robert brockway utoronto ca
                      phone: +1-416-978-1829
Snr System Administrator, Linux & HPC, CCBR, University of Toronto
Contributing member of Software in the Public Interest


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]