Public SourceMage Discussion List

[Eric Sandall <eric AT sandall.us>]

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On Thu, 13 Apr 2006, Jens Laas wrote:
> What is the recommended way to integrate md devices into the init system?
>
> Our new mailserver will use two md-arrays for storage.
> These need to be assembled and mounted at the correct runlevel and also
> the MTA and imap/pop server need to depend on these.
>
> Suggestions?

At home I have my /home partition setup as RAID 1 (mirror). My
/etc/fstab has:
/dev/md0                /home   reiserfs defaults,notail,noatime 0 2

My /etc/raidtab has:
raiddev                 /dev/md0
raid-level              1
nr-raid-disks           2
chunk-size              32
nr-spare-disks          0
persistent-superblock   1
device                  /dev/hdf
raid-disk               0
device                  /dev/hdh
raid-disk               1

I also have /etc/mdadm.conf (the newer RAID tools for 2.6 kernels):
#
# Devices I want mdadm to use /dev/hdf and /dev/hdh
#
DEVICE  /dev/hd[fh]

#
# /dev/hdg1 and /dev/hdh1 are part of /dev/md0 array
# These devices must be listed by a DEVICE line
#
ARRAY  /dev/md0  devices=/dev/hdf,/dev/hdh

#
# Send e-mails when monitoring to here
#
MAILADDR  eric AT sandall.us

The {raidtab,mdadm}.conf is used by the RAID tools to setup /dev/md*
during mountall.sh. Our init scripts do everything else. The only
problem/issue I know of is if you want to have your root partition in
a RAID setup. This takes more magic (and an initrd) than I wanted to
spend time on, so only /home is in a RAID.

- -sandalle

- --
Eric Sandall                     |  Source Mage GNU/Linux Developer
eric AT sandall.us                  |  http://www.sourcemage.org/
http://eric.sandall.us/          |  SysAdmin @ Inst. Shock Physics @ WSU
http://counter.li.org/  #196285  |  http://www.shock.wsu.edu/
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