OK, I have managed to get software RAID 1 running on my wonderful Proliant
server but now have two challenges:
1) Fresh after an OS install and reboot, the RAID array starts to do its
stuff but straight away (as part of the boot messages) I am told that the
second disk is 'not ready for command' and the system hangs as soon as
resyncing starts. I think this is fixed by adding an hdparm line to turn on
DMA (I was also losing ticks), but cannot check this because...
2) As part of the testing, I rebooted the system with the second drive
pulled out, the whole lot then boots and I can use mdadm -a to add the
second drive to the mirrored pair. The drives resync at a decent speed and
the pair works fine for the duration, but when I reboot the second drive is
not part of the mirrored pair unless I manually add it again.
Looking at the md superblock for the second disk, I am wondering if all the
attempts at setting up the RAID array have confused it as this is what I get
- the last section looks wrong (??)
mdadm -E /dev/hde
/dev/hde:
Magic : a92b4efc
Version : 00.90.00
UUID : b0dcd24f:7044414a:1f0ba458:adabce9e
Creation Time : Thu Sep 16 06:21:59 2004
Raid Level : raid1
Device Size : 193157440 (184.21 GiB 197.79 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Wed May 11 09:13:50 2005
State : clean
Active Devices : 1
Working Devices : 2
Failed Devices : 1
Spare Devices : 1
Checksum : 2652883e - correct
Events : 0.15217
Number Major Minor RaidDevice State
this 2 33 0 2 spare /dev/hde
0 0 22 3 0 active sync /dev/hdc3
1 1 0 0 1 faulty removed
2 2 33 0 2 spare /dev/hde
Any suggestions on getting this pair talking properly?
Thanks
Nigel
