On Tue, Jul 26, 2005 at 02:58:43PM -0700, Tyler wrote: > My suggestion would be to buy two new drives, and DD (or dd rescue) the > two bad drives onto the new drives, and then plug the new drive that has > the most recent failure on it (HDG?) in, and try running a forced > assemble including the HDG drive, then, in readonly mode, run an fsck to > check the file system, and see if it thinks most things are okay. *IF* > it checks out okay (for the most part.. you will probably lose some > data), then plug the second new disk in, and add it to the array as a > spare, and it would then start a resync of the array. Otherwise, if the > fsck found that the entire filesystem was fubar... then I would try the > above steps, but force the assemble with the original failed disk.. but > depending on how long in between the two failures its been, and if any > data was written to the array after the first failure, this is probably > not going to be a good thing.. but could still be useful if you were > trying to recover specific files that were not touched in between the > two failures. Thanks for your suggestions. This is what I did so far: I got one of the two bad drives (the one that failed first) replaced with a new one. I copied the other bad drive to the new one with dd. I guess that not everything could be copied alright, I got 10 "Buffer I/O error on device hdg, logical sector ..." and about 35 "end_request: I/O error, hdg, sector ..." error messages in my syslog. Now I'm stuck re-activating the array with the dd'ed hde and the working hdi and hdk. I tried "mdadm --assemble --scan /dev/md0", which told me "mdadm: /dev/md0 assembled from 2 drives - not enough to start the array." I then tried hot-adding hde with "mdadm --add /dev/hde [--force] /dev/md0" but that only got me "mdadm: /dev/hde does not appear to be an md device". Any suggestions? Greets, Frank - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
