Hi, I was using a fakeraid mirror with LVM for backups (don't ask) and after an upgrade from ubuntu 8.10 to ubuntu 9.04, the switch to grub2 broke my system. Before doing anything I wanted to check I could still see my backups on the mirror. I'm using Ubuntu 10.04 Live CD. I boot up and: # sudo su # apt-get install lvm2 ... So far so good. Then # lvdisplay --- Logical volume --- LV Name /dev/VolGroup01/LogVol02 VG Name VolGroup01 LV UUID tyP51S-EMOO-UCfE-4MSy-TA9f-xaJh-SMMnk9 LV Write Access read/write LV Status NOT available LV Size 465.76 GiB Current LE 119234 Segments 1 Allocation inherit Read ahead sectors auto Hmmm... it says "NOT available" and indeed, I can't mount it. # mkdir home # mount /dev/VolGroup01/LogVol02 home mount: special device /dev/VolGroup01/LogVol02 does not exist I checked the raid sets: # dmraid -s pdc_bbbad /dev/sdb: "sil" and "pdc" formats discovered (using pdc)! /dev/sdc: "sil" and "pdc" formats discovered (using pdc)! *** Active Set name : pdc_bbbad size : 976562432 stride : 128 type : mirror status : ok subsets: 0 devs : 2 spares : 0 It says "ok". I also check through dmsetup: # dmsetup info pdc_bbbad Name: pdc_bbbad State: ACTIVE Read Ahead: 256 Tables present: LIVE Open count: 0 Event number: 1 Major, minor: 252, 0 Number of targets: 1 UUID: DMRAID-pdc_bbbad It says "ACTIVE" and the tables present are "LIVE". Why is my logical volume not available? I then tried: # partprobe Error: Can't have a partition outside the disk! Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Now that first error I'd seen a while back even when I could mount the LV. Now: # lvdisplay --- Logical volume --- LV Name /dev/VolGroup01/LogVol02 VG Name VolGroup01 LV UUID tyP51S-EMOO-UCfE-4MSy-TA9f-xaJh-SMMnk9 LV Write Access read/write LV Status suspended # open 0 LV Size 465.76 GiB Current LE 119234 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:4 Status is "suspended". Hmmm, looks slightly more hopefule, but: # lvm lvchange -ay /dev/VolGroup01/LogVol02 device-mapper: resume ioctl failed: Invalid argument Unable to resume VolGroup01-LogVol02 (252:4) Before I tried to mount my LV with the backups I knew little about LV (I remember using some graphical tool to set it up years ago and hadn't touched it since), and new nothing about dmraid or dmsetup so now I'm stuck. Really want to check my backup mirror LV before doing anything else so would really appreciate if someone can give me some pointers as to what to do next. Thanks, Mike. _______________________________________________ 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/
