Hello,
I use software raid for a long time without any trouble. Today, I have
to install a partitionable raid1 array over iSCSI. I have some questions
because I don't understand how make this kind of array.
I have a sparc64 (T1000) with a JBOD (U320 SCSI) that runs a 2.6.23
linux kernel and debian testing distribution.
/dev/sda : internal SAS drive -> OS
/dev/sdb : internal SAS drive -> OS
I have made on /dev/sda and /dev/sdb seven raid1 volumes (non
partitionables arrays).
/dev/sd[c-h] : external U320 drives. Each 300 GB drive only contains one
"type fd" partition.
I have tried to create a partitionable array with :
Root gershwin:[/usr/src/linux-2.6.23] > mdadm -C /dev/mdp0 -l5
--auto=mdp4 -n6 /dev/sd[c-h]1
Root gershwin:[/dev] > ls -l md*
brw-rw---- 1 root disk 9, 0 Oct 15 10:29 md0
brw-rw---- 1 root disk 9, 1 Oct 15 10:29 md1
brw-rw---- 1 root disk 9, 127 Oct 16 09:59 md127
brw-rw---- 1 root disk 9, 2 Oct 15 10:29 md2
brw-rw---- 1 root disk 9, 3 Oct 15 10:29 md3
brw-rw---- 1 root disk 9, 4 Oct 15 10:29 md4
brw-rw---- 1 root disk 9, 5 Oct 15 10:29 md5
brw-rw---- 1 root disk 9, 6 Oct 15 10:29 md6
brw-rw---- 1 root disk 9, 7 Oct 15 10:29 md7
brw-rw---- 1 root disk 9, 8 Oct 15 10:29 md8
crw-rw---- 1 root root 10, 63 Oct 15 10:29 mdesc
brw-rw---- 1 root disk 9, 127 Oct 16 10:03 mdp0
md:
total 0
brw-rw---- 1 root disk 9, 7 Oct 15 10:29 7
brw-rw---- 1 root disk 9, 8 Oct 15 10:29 8
Root gershwin:[/dev] > cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md127 : active raid5 sdh1[6] sdg1[4] sdf1[3] sde1[2] sdd1[1] sdc1[0]
1464725760 blocks level 5, 64k chunk, algorithm 2 [6/5] [UUUUU_]
[==>..................] recovery = 12.6% (37043392/292945152)
finish=127.5min speed=33440K/sec
md6 : active raid1 sda1[0] sdb1[1]
7815552 blocks [2/2] [UU]
md5 : active raid1 sda8[0] sdb8[1]
14538752 blocks [2/2] [UU]
md4 : active raid1 sda7[0] sdb7[1]
4883648 blocks [2/2] [UU]
md3 : active raid1 sda6[0] sdb6[1]
9767424 blocks [2/2] [UU]
md2 : active raid1 sda5[0] sdb5[1]
29294400 blocks [2/2] [UU]
md1 : active raid1 sda2[0] sdb2[1]
489856 blocks [2/2] [UU]
md0 : active raid1 sdb4[1] sda4[0]
4883648 blocks [2/2] [UU]
unused devices: <none>
Root gershwin:[/dev] >
Well, /dev/mdp0 is created. But what's about /dev/mdp0p1 ? I believe
that mdadm has to create required devices. I don't understand where is
my mistake. Any idea ?
Regards,
JKB
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