hi all,
I'm gearing up to setting up a 2tb raid for our research group, and just to see how this stuff works I made a loopback array on one of my machines. I created 5 loopback devices of 1mb each, created a raid5 array and formatted. so far so good. I could copy files on and off, fail a disk with mdadm -f and then return it and everything seemed to work as i expected. Then I decided to see what happens if things go bad, so i fail one disk. fine, array reports "clean, degraded" but I can still access files. Then I fail another, now expecting not to be able to read anything. But, array reports "clean, degraded" and I can still access the files. I then proceeded to fail ALL disks and the array was still "clean, degraded" and I could read the files on it just as well as before??? Can anyone explain to me what's going on here? Was I seeing some cached version (given that the array was so small)?
This is on a machine running fedora core 3 ppc.
thanks,
/Patrik
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