Hi there.. Ok, I have a question regarding software RAID arrays. I have read all the docs I can find on the subject including the excellent software raid howto written by Jakob Ostergaard (see: http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO.html) Fortunately for me, Stephen Kuhn was around to help me at least get the raid-linear built, but I'm stuck again.
What I am trying to do is utilize a bunch of old HD's by combining their capacities into a raid-linear array set up as /dev/md0. This part works perfectly. But, (there's always a but, isn't there? <g>) I also have a new western digital 200GB ide drive. The idea is to mirror the raid-linear data to the 200GB drive using raid-1 which I setup as /dev/md1. Although I realize that raid isn't a substitute for backups, backing up 100GB is data is a real PITA.. heh.. The problem is the raid-1 array doesn't work. Everything seems hunky-dory when I use mkraid to make the device, I can mount it, etc. But when I copy files to /dev/md0, they don't end up on /dev/md1. Obviously, I'm doing something wrong, but I can't figure out what. None of the docs I've read deal with this particular situation and I've tried everything I can think of with no effect. My raidtab file reads as below.. raiddev /dev/md0 raid-level linear nr-raid-disks 10 chunk-size 4 persistent-superblock 1 device /dev/hdb raid-disk 0 <snip> device /dev/sdd raid-disk 9 raiddev /dev/md1 raid-level 1 nr-raid-disks 2 chunk-size 4 persistent-superblock 1 device /dev/md0 raid-disk 0 device /dev/hdk raid-disk1 I have tried swapping md0 and hdk back and forth with no effect, and I've tried copying files to /dev/md1 first instead of md0, all with no effect. What the heck am I doing wrong? <g> Thanks! Michael
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