Cluster
Tux's lil' helper
Joined: 26 Jul 2002
Posts: 146
Location: Cedar Rapids, Iowa
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 Posted: Sun Jul 18, 2004 2:05 am Post subject: Problems with setting up LVM atop software RAID 1 |
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== Background ==
I bought two fresh new 160 GB hard drives. Having placed them into my computer, I booted it with Gentoo LiveCD (minimal install) version 2004.0.
I formatted both of them to have one 50-MB partition for boot, and the rest (159950 MB) for my LVM partition. I then set up RAID by creating /etc/raidtab, running mkraid, etc. The end result:
| Code: | root@livecd / # cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md2 : active raid1 ide/host0/bus1/target0/lun0/part2[1] ide/host0/bus0/target0/lun0/part2[0]
156240064 blocks [2/2] [UU]
md1 : active raid1 ide/host0/bus1/target0/lun0/part1[1] ide/host0/bus0/target0/lun0/part1[0]
45248 blocks [2/2] [UU]
unused devices: <none> |
As we can see, RAID 1 functions correctly. /dev/md1 is my mirrored non-LVM boot partition, and /dev/md2 is my mirrored main LVM partition. My goal is now to set up LVM atop the 159-GB partition.
== Problem ==
I use this documentation. That link takes you exactly to the right section. When I try to follow the first step, here's what I get:
| Code: | root@livecd / # vgscan
Reading all physical volumes. This may take a while...
Found duplicate PV UVjajKazvvJopp489rc9yik8dONPMubA: using /dev/hdc2 not /dev/hda2
/dev/cdrom: open failed: Read-only file system |
When I try to create an LVM physical volume, here's the result:
| Code: | root@livecd / # pvcreate /dev/md2
/dev/cdrom: open failed: Read-only file system
Physical volume "/dev/md2" successfully created |
Success, right? Next up, creating an LVM volume group:
| Code: | root@livecd / # vgcreate -A n storage /dev/md2
Found duplicate PV mAOU6zaaLkiPMZ6bv0pVv3Gw55CNswXB: using /dev/hdc2 not /dev/hda2
/dev/cdrom: open failed: Read-only file system
Found duplicate PV mAOU6zaaLkiPMZ6bv0pVv3Gw55CNswXB: using /dev/hdc2 not /dev/hda2
/dev/cdrom: open failed: Read-only file system
Found duplicate PV mAOU6zaaLkiPMZ6bv0pVv3Gw55CNswXB: using /dev/hdc2 not /dev/hda2
/dev/cdrom: open failed: Read-only file system
Volume group "storage" successfully created |
Again, appears to be successful if we disregard the strange warnings about duplicate PV. But, the kicker comes when I try to create a 10-gigabyte LVM logical volume:
| Code: | root@livecd / # lvcreate -A n -L 10000 -n root storage
Found duplicate PV UVjajKazvvJopp489rc9yik8dONPMubA: using /dev/hdc2 not /dev/hda2
/dev/cdrom: open failed: Read-only file system
Found duplicate PV UVjajKazvvJopp489rc9yik8dONPMubA: using /dev/hdc2 not /dev/hda2
/dev/cdrom: open failed: Read-only file system
Volume group "storage" doesn't exist |
== Question ==
Does anyone know what I am doing wrong with LVM? Maybe the Gentoo LiveCD has known bad LVM support? Do I need to load some kernel module? Or maybe change some hardware configuration? |
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Kernel & Hardware
