Hi list, i'll try to make it short, but raid-problems seem to have sooo long descriptions ;) A week ago i got a 200GB Sata drive and an Adapted 1210SA and decided to do some tests with evms and software-raid and so i created a Raid5 out of 3 Partitions using evmsgui: 15gb sda6 (Scsi Disk) 15gb sdb6 (Scsi Disk) 15gb sdc6 (Sata Disk) No spares. (i know this is not the best disk-config, but it was purely for testing, neither important data nor high performance) Worked like a charm for some days, but 2 days ago the system crashed (while i was away). I don't know if it happened because of the raid, but my sys hasn't crashed for over a year, so i highly suspect it. After rebooting, the raid5 did not come back, i got boot-messages like: [ 34.232750] md: md2: raid array is not clean -- starting background reconstruction [ 34.317923] raid5: device dm-5 operational as raid disk 1 [ 34.403238] raid5: device dm-4 operational as raid disk 0 [ 34.487662] raid5: cannot start dirty degraded array for md2 [ 34.571717] RAID5 conf printout: [ 34.655027] --- rd:3 wd:2 fd:1 [ 34.737736] disk 0, o:1, dev:dm-4 [ 34.820023] disk 1, o:1, dev:dm-5 [ 34.901839] raid5: failed to run raid set md2 [ 34.983871] md: pers->run() failed ... [ 35.070053] md: bind<dm-26> [ 35.150748] md: bind<dm-27> [ 35.309622] md: array md2 already has disks! [ 35.388342] md: array md2 already has disks! [ 35.466417] md: array md2 already has disks! [ 35.544040] md: array md2 already has disks! [snip] [ 42.500546] md: array md2 already has disks! [ 42.562950] md: array md2 already has disks! [ 42.623025] md: array md2 already has disks! [ 42.686593] md: array md2 already has disks! [ 42.744099] md: array md2 already has disks! [snip] [ 50.918891] md: array md2 already has disks! [ 50.919045] md: array md2 already has disks! [ 50.919169] md: array md2 already has disks! [ 50.919290] md: array md2 already has disks! [ 50.919454] md: array md2 already has disks! [ 50.919565] md: array md2 already has disks! The rest of the sata-drive, which run as single evms-volumes (namely sdc7/sdc8 both with 80gb) run fine. Even after removing the sata-drive from the system i'm still not able to start the raid5 with the 2 scsi discs, i always get: # mdadm --manage --run /dev/md2 mdadm: failed to run array /dev/md2: Input/output error But the scsi-disks are fine and the other raid0/1 which i have on the scsi-discs are running without problems. I really wonder why i can't start a raid5 with 2 disks and instead get I/O Errors. It doesn't matter if i have the sata disk connected or not, it's always the same. For now i did not upgrade any software, still running: # uname -a Linux pc1 2.6.15-gentoo-r1 #6 SMP PREEMPT Fri Apr 21 14:16:34 CEST 2006 i686 Intel(R) Xeon(TM) CPU 2.40GHz GenuineIntel GNU/Linux # mdadm --version mdadm - v1.12.0 - 14 June 2005 Any advice how to start the raid5 or shall i update mdadm (seems kinda old)? Like i said, i have no important data on it, so i could live with a reset, but the reason for my test was to find out if i can trust md+evms and so i'm highly interested what to do now. Greets, Chris - 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
