RAID, a little question ...
Ciao,
I have bought 2 IBM EIDE DJNA 13.5 Gb to do RAID under Linux.
It works ... not complitely.
Short question: is it possible to have more than 4 md-devices?
I can't do it.
Devices md0 md1 md2 md3 works ok, no problem, but I want to setup md4 and
md5 too.
This is the situation:
/usr/share/doc/raidtools$ fdisk -l /dev/hdb
Disk /dev/hdb: 255 heads, 63 sectors, 1650 cylinders
Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hdb1 1 1650 13253593+ 5 Estesa
/dev/hdb5 1 486 3903732 83 Linux
/dev/hdb6 487 972 3903763+ 83 Linux
/dev/hdb7 973 1458 3903763+ 83 Linux
/dev/hdb8 1459 1474 128488+ 82 Linux swap
/dev/hdb9 1475 1490 128488+ 82 Linux swap
/dev/hdb10 1491 1650 1285168+ 83 Linux
/usr/share/doc/raidtools$ fdisk -l /dev/hdd
Disk /dev/hdd: 16 heads, 63 sectors, 26310 cylinders
Units = cylinders of 1008 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hdd1 1 26310 13260208+ 5 Estesa
/dev/hdd5 1 7750 3905937 83 Linux
/dev/hdd6 7751 15500 3905968+ 83 Linux
/dev/hdd7 15501 23250 3905968+ 83 Linux
/dev/hdd8 23251 23498 124960+ 82 Linux swap
/dev/hdd9 23499 23746 124960+ 82 Linux swap
/dev/hdd10 23747 26310 1292224+ 83 Linux
twins :-)
/usr/share/doc/raidtools$ cat /etc/raid/raid1.conf
# Sample raid-1 configuration
############
# /usr
raiddev /dev/md0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdb5
raid-disk 0
device /dev/hdd5
raid-disk 1
############
# /usr/local
raiddev /dev/md1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdb6
raid-disk 0
device /dev/hdd6
raid-disk 1
############
# /usr/dati
raiddev /dev/md2
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdb7
raid-disk 0
device /dev/hdd7
raid-disk 1
###########
# swap1
raiddev /dev/md3
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdb8
raid-disk 0
device /dev/hdd8
raid-disk 1
###########
# swap2
raiddev /dev/md4
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdb9
raid-disk 0
device /dev/hdd9
raid-disk 1
##########
# /var
raiddev /dev/md5
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdb10
raid-disk 0
device /dev/hdd10
raid-disk 1
I would like to mount:
/dev/md0 /usr
/dev/md1 /usr/local
/dev/md2 /usr/local/dati
/dev/md3 swap1
/dev/md4 swap2
/dev/md5 /var
AH!
/usr/share/doc/raidtools$ dir /dev/md*
brw-rw---- 1 root disk 9, 0 Oct 21 23:09 /dev/md0
brw-rw---- 1 root disk 9, 1 Oct 21 23:09 /dev/md1
brw-rw---- 1 root disk 9, 10 Oct 21 23:09 /dev/md10
brw-rw---- 1 root disk 9, 11 Oct 21 23:09 /dev/md11
brw-rw---- 1 root disk 9, 12 Oct 21 23:09 /dev/md12
brw-rw---- 1 root disk 9, 13 Oct 21 23:09 /dev/md13
brw-rw---- 1 root disk 9, 14 Oct 21 23:09 /dev/md14
brw-rw---- 1 root disk 9, 15 Oct 21 23:09 /dev/md15
brw-rw---- 1 root disk 9, 2 Oct 21 23:09 /dev/md2
brw-rw---- 1 root disk 9, 3 Oct 21 23:09 /dev/md3
brw-rw---- 1 root disk 9, 4 Oct 21 23:09 /dev/md4
brw-rw---- 1 root disk 9, 5 Oct 21 23:09 /dev/md5
brw-rw---- 1 root disk 9, 6 Oct 21 23:09 /dev/md6
brw-rw---- 1 root disk 9, 7 Oct 21 23:09 /dev/md7
brw-rw---- 1 root disk 9, 8 Oct 21 23:09 /dev/md8
brw-rw---- 1 root disk 9, 9 Oct 21 23:09 /dev/md9
/usr/share/doc/raidtools$ cat /proc/mdstat
Personalities : [3 raid1]
read_ahead 128 sectors
md0 : active raid1 hdb5 hdd5 3903616 blocks [2/2] [UU]
md1 : active raid1 hdb6 hdd6 3903680 blocks [2/2] [UU]
md2 : active raid1 hdb7 hdd7 3903680 blocks [2/2] [UU]
md3 : active raid1 hdb8 hdd8 124864 blocks [2/2] [UU]
but md4 and md5 ???
How can I add more md devices? in /proc/mdstat?
--
Paolo Pedaletti, Como, ITALYa
paolo . pedaletti @ flashnet . it
pub 1024D/09120D83 1999-06-11 Paolo Pedaletti (Linux) <paolo.pedaletti@flashnet.it>
Key fingerprint = 0058 45AE B7D3 D603 7D0E D9B8 26E6 01E0 0912 0D83
sub 2048g/F0A8E667 1999-06-11
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