Hi I'm trying to upgrade my personal web server & I have a 4 port SATA2 PCI card with the 4 Hard Drives connected, I'm putting a 1GB swap partition at the front of each of the 4 500GB drives and the rest is / in an mdadm software RAID5 configuration.

I know you cant boot a RAID5 system directly so I've tried having /boot on a 4GB CF card connected to the on-board IDE bus, and also on 2 in a RAID1 configuration,

I've been banging my head against this for a while,
I've been adding various permutations of
insmod raid
insmod raid5rec
insmod mdraid

to the grub boot options along with adding a rootdelay=15 bootdegraded=true init=/initrd.img-2.6.32-5-686
to the kernel line and I've ended up with an unbootable machine.

The current attempt leaves me with an error along the lines of
raid5: not enough operational devices for md0 (3/4 failed)
raid5: failed to run raid set md0
md: pers->run() failed...
mdadm: failed to RUN_ARRAY /dev/md/0: input/output error
mdadm: Not enough devices to start the array.
mdadm: /dev/md/0 is already in use.

But if I boot a knoppix disk the array starts and mounts fine, one thing that occurred to me is that the initrd and vmlinuz symlinks are in / and not accessible until the array is assembled.

there are more messages about failing to mount stuff which you'd expect before
Target filesystem doesn't have requested /sbin/init.
No init found, Try passing init= bootarg.

but if I go the the grub prompt and ls /
I can see the /initrd.img-2.6.32-5-686 and /vmlinuz-2.6.32-5-686 and a config file listed.

I've read numerable howtos but most of them are talking about having / on a RAID1 or 10 partition & many go on to say the modern installers are prity good with regard to RAID and it should just work.

What am I missing? I'm sure it's something pretty obvious that my searchfu hasn't turned up.

Sorry it's a bit long

Any help greatly appreciated, thank you for your time.


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