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
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