On 8/23/07, Greg Nicholson <d0gz.net@xxxxxxxxx> wrote: > <Trimming tons of detail, but keeping the thread> > > OK.... I've reproduced the original issue on a seperate box. > 2.6.23-rc3 does not like to grow Raid 5 arrays. MDadm 2.6.3 > > mdadm --add /dev/md0 /dev/sda1 > mdadm -G --backup-file=/root/backup.raid.file /dev/md0 > > (Yes, I added the backup-file this time... just to be sure.) > > Mdadm began the grow, and stopped in the critical section, or right > after creating the backup... Not sure which. Reboot. > > Refused to start the array. So... > > mdadm -A /dev/md0 /dev/sd[abdefg]1 > > and we have in /proc/mdstat: > > Personalities : [raid6] [raid5] [raid4] > md0 : active raid5 sdg1[0] sda1[5] sdf1[4] sdd1[3] sdb1[2] sde1[1] > 1953535488 blocks super 0.91 level 5, 128k chunk, algorithm 2 > [6/6] [UUUUUU] > [>....................] reshape = 0.0% (512/488383872) > finish=378469.4min speed=0K/sec > > unused devices: <none> > > And it's sat there without change for the past 2 hours. Now, I have a > backup, so frankly, I'm about to blow away the array and just recreate > it, but I thought you should know. > > I've got the stripe_cache_size at 8192... 256 and 1024 don't change anything. > Forgot the DMESG output: md: bind<sde1> md: bind<sdb1> md: bind<sdd1> md: bind<sdf1> md: bind<sda1> md: bind<sdg1> md: md0: raid array is not clean -- starting background reconstruction raid5: reshape will continue raid5: device sdg1 operational as raid disk 0 raid5: device sda1 operational as raid disk 5 raid5: device sdf1 operational as raid disk 4 raid5: device sdd1 operational as raid disk 3 raid5: device sdb1 operational as raid disk 2 raid5: device sde1 operational as raid disk 1 raid5: allocated 6293kB for md0 raid5: raid level 5 set md0 active with 6 out of 6 devices, algorithm 2 RAID5 conf printout: --- rd:6 wd:6 disk 0, o:1, dev:sdg1 disk 1, o:1, dev:sde1 disk 2, o:1, dev:sdb1 disk 3, o:1, dev:sdd1 disk 4, o:1, dev:sdf1 disk 5, o:1, dev:sda1 ...ok start reshape thread md: reshape of RAID array md0 md: minimum _guaranteed_ speed: 1000 KB/sec/disk. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reshape. md: using 128k window, over a total of 488383872 blocks. Looks good, but it doesn't actually do anything. - 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
