As I learn more about LVM, let me add some more info:
[root@masterbackend array]# more /proc/lvm/global
LVM module LVM version 1.0.7(28/03/2003)
Total: 2 VGs 2 PVs 3 LVs (0 LVs open)
Global: 862101 bytes malloced IOP version: 10 10:03:51 active
VG: vgroup00 [1 PV, 1 LV/0 open] PE Size: 16384 KB
Usage [KB/PE]: 872710144 /53266 total 872710144 /53266 used 0 /0
free
PV: [AA] md0 872710144 /53266 872710144 /53266
0 /0
LV: [AWDL ] storage1 872710144 /53266 close
VG: logdev [1 PV, 2 LV/0 open] PE Size: 4096 KB
Usage [KB/PE]: 1536000 /375 total 565248 /138 used 970752 /237 free
PV: [AA] md2 1536000 /375 565248 /138
970752 /237
LVs: [AWDL ] syslog 524288 /128 close
[AWDL ] storage1 40960 /10 close
[root@masterbackend root]# lvdisplay /dev/vgroup00/storage1
--- Logical volume ---
LV Name /dev/vgroup00/storage1
VG Name vgroup00
LV Write Access read/write
LV Status available
LV # 1
# open 0
LV Size 832.28 GB
Current LE 53266
Allocated LE 53266
Allocation next free
Read ahead sectors 1024
Block device 58:2
[root@masterbackend root]# lvdisplay /dev/logdev/storage1
--- Logical volume ---
LV Name /dev/logdev/storage1
VG Name logdev
LV Write Access read/write
LV Status available
LV # 2
# open 0
LV Size 40 MB
Current LE 10
Allocated LE 10
Allocation next free
Read ahead sectors 1024
Block device 58:1
[root@masterbackend root]# lvdisplay /dev/logdev/syslog
--- Logical volume ---
LV Name /dev/logdev/syslog
VG Name logdev
LV Write Access read/write
LV Status available
LV # 1
# open 0
LV Size 512 MB
Current LE 128
Allocated LE 128
Allocation next free
Read ahead sectors 1024
Block device 58:0
I have been able to mount /dev/logdev/syslog:
[root@masterbackend root]# mount -t xfs /dev/logdev/syslog /mnt/syslog/
[root@masterbackend root]# ls /mnt/array/
initlog.txt internal.bak internal.txt nfs samba syslog.bak
syslog.txt
However, I cannot mount the other two XFS filesystems:
[root@masterbackend root]# mount -t xfs /dev/logdev/storage1
/mnt/storage1
mount: wrong fs type, bad option, bad superblock on
/dev/logdev/storage1,
or too many mounted file systems
[root@masterbackend root]# mount -t xfs /dev/vgroup00/storage1
/mnt/storage1
mount: wrong fs type, bad option, bad superblock on
/dev/vgroup00/storage1,
or too many mounted file systems
All three of these LVs appear to be XFS filesystems:
[root@masterbackend root]# hexdump -C -n 1024 /dev/logdev/syslog
00000000 58 46 53 42 00 00 10 00 00 00 00 00 00 02 00 00
|XFSB............|
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
00000020 ac 47 30 43 a8 28 44 2f ad 35 91 da b3 59 b3 80
|.G0C.(D/.5...Y..|
00000030 00 00 00 00 00 01 00 04 00 00 00 00 00 00 00 80
|................|
00000040 00 00 00 00 00 00 00 81 00 00 00 00 00 00 00 82
|................|
00000050 00 00 00 10 00 00 40 00 00 00 00 08 00 00 00 00
|......@.........|
00000060 00 00 04 b0 20 84 02 00 01 00 00 10 00 00 00 00 |....
...........|
00000070 00 00 00 00 00 00 00 00 0c 09 08 04 0e 00 00 19
|................|
00000080 00 00 00 00 00 00 02 00 00 00 00 00 00 00 01 cb
|................|
00000090 00 00 00 00 00 01 f9 b7 00 00 00 00 00 00 00 00
|................|
000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
000000b0 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00
|................|
000000c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000200 58 41 47 46 00 00 00 01 00 00 00 00 00 00 40 00
|XAGF..........@.|
00000210 00 00 00 01 00 00 00 02 00 00 00 00 00 00 00 01
|................|
00000220 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 03
|................|
00000230 00 00 00 04 00 00 3f cd 00 00 3f 84 00 00 00 00
|......?...?.....|
00000240 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000400
[root@masterbackend root]# hexdump -C -n 1024 /dev/logdev/storage1
00000000 fe ed ba be 00 00 00 01 00 00 00 01 00 00 00 14
|................|
00000010 00 00 00 01 00 00 00 00 00 00 00 01 00 00 00 00
|................|
00000020 00 00 00 00 ff ff ff ff 00 00 00 01 b0 c0 d0 d0
|................|
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000120 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01
|................|
00000130 0f ef 3b 71 68 eb 4b 0b a4 e7 88 1c 35 8b 33 c7
|..;qh.K.....5.3.|
00000140 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
00000150 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000200 00 00 00 01 00 00 00 08 aa 20 00 00 6e 55 00 00 |.........
..nU..|
00000210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000400
[root@masterbackend root]# hexdump -C -n 1024 /dev/vgroup00/storage1
00000000 58 46 53 42 00 00 10 00 00 00 00 00 0d 01 20 00
|XFSB.......... .|
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
00000020 0f ef 3b 71 68 eb 4b 0b a4 e7 88 1c 35 8b 33 c7
|..;qh.K.....5.3.|
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80
|................|
00000040 00 00 00 00 00 00 00 81 00 00 00 00 00 00 00 82
|................|
00000050 00 00 00 10 00 10 00 00 00 00 00 d1 00 00 00 00
|................|
00000060 00 00 27 10 20 d4 02 00 01 00 00 10 00 00 00 00 |..'.
...........|
00000070 00 00 00 00 00 00 00 00 0c 09 08 04 14 00 00 19
|................|
00000080 00 00 00 00 00 00 01 80 00 00 00 00 00 00 01 71
|...............q|
00000090 00 00 00 00 0d 01 18 67 00 00 00 00 00 00 00 00
|.......g........|
000000a0 00 00 00 00 00 00 00 83 00 00 00 00 00 00 00 84
|................|
000000b0 00 77 00 00 00 00 00 02 00 00 00 00 00 00 00 00
|.w..............|
000000c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000200 58 41 47 46 00 00 00 01 00 00 00 00 00 10 00 00
|XAGF............|
00000210 00 00 00 01 00 00 00 02 00 00 00 00 00 00 00 01
|................|
00000220 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 03
|................|
00000230 00 00 00 04 00 0f ff e9 00 0f fe 62 00 00 00 00
|...........b....|
00000240 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00000400
Any ideas? I'm desperate to get the data off of these filesystems.
Thanks,
Tim
> -----Original Message-----
> From: linux-lvm-bounces@redhat.com
[mailto:linux-lvm-bounces@redhat.com]
> On Behalf Of Tim Harvey
> Sent: Thursday, June 03, 2004 12:16 AM
> To: linux-lvm@redhat.com
> Subject: Troubling activating and mounting a volume group
>
> Greetings,
>
> I'm trying to recover data from a couple of RAID arrays that were
> created in a system that has died. The arrays themselves are intact.
>
> I've been able to assemble the arrays and find logical volumes on
them,
> but I'm not sure how to activate the LG's and mount the volumes.
>
> I've assembled the arrays with 3 out of the 4 disks, which should be
> enough to access the data in a RAID1/5 array if I understand things
> correctly without allowing RAID reconstruction. Here is some data
from
> my progress so far:
>
> [root@masterbackend root]# more /proc/mdstat
> Personalities : [raid1] [raid5]
> read_ahead 1024 sectors
> md1 : active raid1 hdb2[1] hdd2[3] hdc2[2]
> 513984 blocks [4/3] [_UUU]
>
> md0 : active raid5 hdb1[1] hdd1[3] hdc1[2]
> 872738880 blocks level 5, 32k chunk, algorithm 2 [4/3] [_UUU]
>
> unused devices: <none>
>
> md0 is a RAID5 array which has a VG called 'vgroup00' and an LV called
> 'storage1'. md1 is a RAID1 array which as a VG called 'logdev'.
>
> [root@masterbackend root]# vgdisplay -D
> --- Volume group ---
> VG Name vgroup00
> VG Access read/write
> VG Status NOT available/resizable
> VG # 0
> MAX LV 256
> Cur LV 1
> Open LV 0
> MAX LV Size 1023.97 GB
> Max PV 256
> Cur PV 1
> Act PV 1
> VG Size 832.28 GB
> PE Size 16 MB
> Total PE 53266
> Alloc PE / Size 53266 / 832.28 GB
> Free PE / Size 0 / 0
> VG UUID oizRKm-JFUq-hMiZ-rN6F-1M7u-mRDc-vqqy1p
>
> --- Volume group ---
> VG Name logdev
> VG Access read/write
> VG Status NOT available/resizable
> VG # 1
> MAX LV 256
> Cur LV 2
> Open LV 0
> MAX LV Size 255.99 GB
> Max PV 256
> Cur PV 1
> Act PV 1
> VG Size 1.46 GB
> PE Size 4 MB
> Total PE 375
> Alloc PE / Size 138 / 552 MB
> Free PE / Size 237 / 948 MB
> VG UUID nCpyXh-5bn4-Qh2W-UlAc-3dyh-zQOT-i33ow8
>
> So far I'm not understanding how to make the VG Status 'available' and
> how to mount them. I now have the following devices:
>
> /dev/vgroup00/storage1 block special (58/2)
> /dev/vgroup00/group character special (109/0)
> /dev/logdev/storage1 block special (58/1)
> /dev/logdev/syslog block special (58/0)
> /dev/logdev/group character special (109/1)
>
> I believe these are XFS but I still can't mount them via:
>
> [root@masterbackend root]# mount /dev/vgroup00/storage1 /mnt/array/ -t
> xfs
> mount: wrong fs type, bad option, bad superblock on
> /dev/vgroup00/storage1,
> or too many mounted file systems
>
> Any ideas? I'm not familiar with LVM, but have been googling it.
>
> Thanks for any help,
>
> Tim
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
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