I found the answer to my question. This has been a rather interesting puzzle as the original NAS device was a black box and I've had to try and figure out how they store the data. The /dev/logdev/storage1 was the 'log device' for the XFS filesystem in /dev/vgroup00/storage1. I was able to mount my filesystem using: [root@masterbackend root]# mount -t xfs -o logdev=/dev/logdev/storage1 /dev/vgr Success finally! 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 9:41 AM > To: linux-lvm@redhat.com > Subject: RE: Troubling activating and mounting a volume group > > 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/ > > _______________________________________________ > 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/ _______________________________________________ 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/
