On Thu, Mar 06, 2003 at 09:33:52AM -0800, James D. Parra wrote:
> Any ideas on how to make Linux RAID 1 failover work with IDE drives.

It does.  A tricky part is how to simulate a drive death.  Pulling a
live plug on IDE is problematic.  (I remember recently seeing mention
in the kernel 2.5 discussions about implementing IDE hotplug.  I am
pretty sure 2.4 does not think it supports hotplug of IDE.)

Because of how PCs boot, booting with a drive missing can make for
problems.  I still don't know if there is a way to make a drive
bootable no matter where the BIOS thinks it is.

I know raid 1 works because I had it do so.  On Red Hat 7.0 I had
bootable software raid 1 running on two different controllers.  (I
shared one controller with a CD-ROM.)

One day while I was buring a CD (I figure that had something to do
with it) one of my drives died.  Judging from the log files it was in
the middle of a DMA.  And I never knew anything happened, the machine
kept running, my CD was burned.  It was only the next moring when I
got an automatic e-mail telling me that /porc/mdstatus had changed.

My machine wasn't bootable at that point without some futzing, but it
kept running.

I finally got a new drive, stuck it in, and it seems happy still.


-kb



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