I had a hard time following this thread but it sounds similiar to what I am
doing.
I have 2 SCSI disks on an AIC7899 controller channel's A and B. They are
partioned like so.
Device Boot Start End Blocks Id System
/dev/sda1 * 1 8 64228+ fd Linux raid autodetect
/dev/sda2 9 136 1028160 fd Linux raid autodetect
/dev/sda3 137 201 522112+ fd Linux raid autodetect
/dev/sda4 202 2247 16434495 fd Linux raid autodetect
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 8 64228+ fd Linux raid autodetect
/dev/sdb2 9 136 1028160 fd Linux raid autodetect
/dev/sdb3 137 201 522112+ fd Linux raid autodetect
/dev/sdb4 202 2247 16434495 fd Linux raid autodetect
The md's look like this:
[root@portal /etc]# cat raidtab
raiddev /dev/md0
raid-level 1
nr-raid-disks 2
chunk-size 64k
persistent-superblock 1
#nr-spare-disks 0
device /dev/sda1
raid-disk 0
device /dev/sdb1
raid-disk 1
raiddev /dev/md1
raid-level 1
nr-raid-disks 2
chunk-size 64k
persistent-superblock 1
#nr-spare-disks 0
device /dev/sda2
raid-disk 0
device /dev/sdb2
raid-disk 1
raiddev /dev/md2
raid-level 1
nr-raid-disks 2
chunk-size 64k
persistent-superblock 1
#nr-spare-disks 0
device /dev/sda3
raid-disk 0
device /dev/sdb3
raid-disk 1
raiddev /dev/md3
raid-level 1
nr-raid-disks 2
chunk-size 64k
persistent-superblock 1
#nr-spare-disks 0
device /dev/sda4
raid-disk 0
device /dev/sdb4
raid-disk 1
On top of these I built some ext2, and LVM's on which I placed reiserfs's.
Finally, the lvm stuff look like this:
[root@portal /etc]# pvscan
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- ACTIVE PV "/dev/md3" of VG "mainlvm" [15.67 GB / 4.18 GB free]
pvscan -- total: 1 [15.67 GB] / in use: 1 [15.67 GB] / in no VG: 0 [0]
[root@portal /etc]# vgscan
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- found active volume group "mainlvm"
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume group
[root@portal /etc]# lvscan
lvscan -- ACTIVE "/dev/mainlvm/home" [500.00 MB]
lvscan -- ACTIVE "/dev/mainlvm/usr" [3.00 GB]
lvscan -- ACTIVE "/dev/mainlvm/usrlocal" [5.00 GB]
lvscan -- ACTIVE "/dev/mainlvm/var" [3.00 GB]
lvscan -- 4 logical volumes with 11.49 GB total in 1 volume group
lvscan -- 4 active logical volumes
I have no idea if this is the right way to do it or not. I get no segfaults
and have not noticed any fs corruption. I think software raid pretty much
stinks but sometimes you have to go with what you have, not what you wished
you had.
Sorry if this was a waste of your time.
--
Lewis Bergman
Texas Communications
4309 Maple St.
Abilene, TX 79602-8044
915-695-6962
