Messages in this thread | | | Subject | disk-mirroring | Date | Wed, 17 Sep 1997 13:28:49 -0700 | From | Mike Slemmer <> |
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I'm interested in a kernel patch which, like md, talks to multiple block devices, but does disk-mirroring. Does such a thing exist?
My look at the code indicates that it _might_ be easy to implement with a workaround that copies the linear md code but instead of md_map-ping the block to a different sector, it simply tells the caller to write it to two devices.
I also am interested in figuring out a way to boot from hard disk 2 if hd1 has a hardware failure. This may be impossible w/o floppy booting and then transferring control to a hard disk. I'd rather not introduce a floppy into the system (obviously, I'm trying to create a fail-safe system that no one ever has to physically do anything to).
Any thoughts on the disk-mirroring patch or changing which hd gets booted would be greatly appreciated.
Mike Slemmer slemmer@cs.stanford.edu
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