Red Hat Bugzilla – Bug 315821
[FutureFeature] Add possibility to include more modules and start more RAIDs
Last modified: 2008-06-16 22:33:59 EDT
It would be great to have command line option and possibly configuration option
(/etc/sysconfig/kernel?) to add drivers for all used drive controllers and for
starting more raids in initrd.
Now only modules and RAIDs needed for / partitions are added. I would prefer to
be able to add modules for all controllers and all RAIDs to initrd. The initrd
size gain would not be so important (to me).
Example: I have server booting from two flash 2GB drives. Each drive has 100MB
partition /boot (RAID1) and almost 2GB / partition (RAID0). When creating
initrd, it will add module for RAID0 and will add command raidautostart /dev/md1.
Some times later I want to change to one 4GB flash mirrored with iSCSI. So I
boot livecd, prepare the environment and copy data. However, system is now
running from /dev/md0 and using RAID1. I have to manually update initrd image
(which is not so easy as I do not have running system to simply use mkinitrd).
I wonder what is the reason not to add all possibly required modules to initrd?
And why not to try to start all possilble RAIDs?
After looking into mkinitrd once again I've discovered that mkinitrd can load
configuration from /etc/sysconfig/mkinitrd . This should be documented somewhere
as it is really good thing. Googling the file name produced this description
After looking into mkinitrd I've discovered that it does not initialize
raiddevices variable and so I can use this configuration:
raiddevices="/dev/md0 /dev/md1 /dev/md2 /dev/md3 /dev/md4 /dev/md5 /dev/md6"
MODULES="raid0 raid1 raid5 raid6 raid10 linear raid456 ahci sata_sil"
Which tries to load all mentioned modules and tries to run all specified RAIDs.
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