From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050328 Fedora/1.7.6-1.2.5 Description of problem: I had a RAID 1 mirror when one disk failed. When backing up the data on the remaining disk, I found that it had bad blocks for a few files -- i.e. it had errors when trying to read the files. The RAID1 kernel driver repeatedly tried to retry the failed read until the system was rebooted. No I/O errors were returned. Mounting the partition without using the RAID software just tried to read the blocks once and then returned an I/O error. Version-Release number of selected component (if applicable): kernel-smp-2.6.10-1.771_FC2 How reproducible: Always Steps to Reproduce: 1. Get a disk with bad blocks. 2. Set it up as a RAID 1 disk with only one disk (i.e. one failed disk, one running one) 3. Somehow allocate a file that uses those bad blocks. 4. Read the file (cat it). Additional info: See /var/log/messages in the attachment. The lines with raid1: hdc4: rescheduling sector 36551664 and raid1: hdc4: redirecting sector 36551664 to another mirror point to a problem in the kernel in drivers/md/raid1.c where it doesn't check to see if there is only one disk in the set before retrying a failed I/O operation. Also, from comparing raid1.c from 2.6.10-1.771_FC2smp and kernel.org's 2.6.13.2, it appears that the bug is also in the mainline kernel.
Created attachment 119287 [details] /var/log/messages output showing problem
This doesn't seem to be important enough to fix just on its own, so mark it DEFER.
Not a security issue.