New linux & unix installs with old raid/lvm set-up
I have some questions about raid & lvm. I currently have raid 5 set up via mdadm and lvm (lvm2) set up along with it, running on an old Ubuntu Studio (8.10). I need to upgrade (via fresh install) to a more recent (9.10) version of the system but am not sure what steps to take to sync the new OS install with the old raid/lvm set-up. I have an OS hard drive that is separate from my raid/lvm hard drives. I'd like to install Ubuntu Studio, Solaris and/or OpenBSD, and another *nix onto the computer. I plan on using Studio for music recording/composing purposes and another unix/linux install for normal computer uses. First things first, I'd like to get Ubuntu Studio 9.10 up and running and also working with the raid/lvm disks. How do I do that?
I have some basic ideas but don't know if I'm missing any steps.
Here are some info on my current set-ups...
# vgscan Reading all physical volumes. This may take a while... Found volume group "vg0" using metadata type lvm2
# vgdisplay --- Volume group --- VG Name vg0 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 6 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 3 Max PV 0 Cur PV 1 Act PV 1 VG Size 931.52 GB PE Size 4.00 MB Total PE 238468 Alloc PE / Size 238468 / 931.52 GB Free PE / Size 0 / 0 VG UUID q9qxE4-tp1X-PUZl-cWfE-PGI3-3y4X...
# pvscan PV /dev/md0 VG vg0 lvm2 [931.52 GB / 0 free] Total: 1 [931.52 GB] / in use: 1 [931.52 GB] / in no VG: 0 [0 ]
# pvdisplay --- Physical volume --- PV Name /dev/md0 VG Name vg0 PV Size 931.52 GB / not usable 2.75 MB Allocatable yes (but full) PE Size (KByte) 4096 Total PE 238468 Free PE 0 Allocated PE 238468 PV UUID Xw1LeW-LRbq-Xt0J-0XtR-fEfi-5LBk...
# df -h /dev/mapper/vg0-vault 755G 293G 463G 39% /studio/vault /dev/mapper/vg0-zone 87G 184M 83G 1% /zone /dev/mapper/vg0-nomad 87G 342M 82G 1% /nomad
$ fdisk -l Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x000c177d Device Boot Start End Blocks Id System /dev/sdb1 1 60801 488384001 fd Linux raid autodetect Disk /dev/sdc: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x000caa62 Device Boot Start End Blocks Id System /dev/sdc1 1 60801 488384001 fd Linux raid autodetect Disk /dev/sdd: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x000d3415 Device Boot Start End Blocks Id System /dev/sdd1 1 60801 488384001 fd Linux raid autodetect
$ more /etc/fstab # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 # /dev/sda5 UUID=aab73c93-5c74-4252-b2db / ext3 relatime,error s=remount-ro 0 1 # /dev/sda1 UUID=90e2151d-168b-4918-9019 /boot ext3 relatime 0 2 # /dev/sda6 UUID=a8097c76-3754-4c5a-8371 /studio/workspace ext3 relatime 0 2 # /dev/sda2 UUID=30DCC729DCC6 /windows ntfs defaults,umask=007,gid=46 0 1 # /dev/sda7 UUID=43caaa32-d48f-414a-87b7 none swap sw 0 0 # /dev/sda8 UUID=8b3abdfd-a4cb-478d-b84d none swap sw 0 0 /dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0 /dev/vg0/vault /studio/vault xfs rw,noatime 0 0 /dev/vg0/zone /zone ext3 rw,noatime 0 0 /dev/vg0/nomad /nomad ext3 rw,noatime 0 0
For testing purposes (?)...
1. Boot live cd
2. Install mdadm & lvm2 (while running the live cd)
3. Run these commands:
sudo mdadm --assemble
sudo vgchange -a y
Or perhaps more precisely (?) the following, and this is during an actual OS install:
1. Install Ubuntu Studio 9.10 DVD (an alternate, not a "live" disc)
2. Install mdadm & lvm(2)
3. Enter the following commands:
$ sudo mdadm --assemble /dev/md0 --uuid=(???) /dev/sdb /dev/sdc /dev/sdd
$ sudo vgchange -a y
4. Copy old fstab file into new fstab file. (It can be backed up on another disk.)
Where do I get the correct uuid for the mdadm re-assembly command?
Is including that uuid necessary?
Or is the fstab change really necessary?
Or will I need to still do some kind of "modprobe" for mdadm and/or lvm2?
I might be over-thinking some of this, I don't know, but I'd rather over than under-think it.
I'm running a 64-bit system, not sure if that matters here.
Thank you in advance for any help on this!
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