Ok, I tried a couple of things, so far with no success. I re-created the array, let it synchronize, then rebooted. When I first created the array, the components devices looked like this: md0 : active raid5 sda[0] sdb[1] sdc[2] sdd[3] When I rebooted, it suddenly comes up like this, skipping component device 3: md0 : active raid5 sda[0] sdd[4] sdb[1] sdc[2] and it was automatically resyncing, destroying the last 6 hours I was waiting for it to initially sync, and it changed my chunk size! Why do I keep getting these problems? On Mon, Jan 18, 2010 at 12:33 PM, Stephan Stachurski <ses1984@xxxxxxxxx> wrote: > I'm having problems with an array that I just created. It's a raid > level 5 with 4 devices using all of the default settings. I'm using > the version of mdadm that's included in ubuntu 9.10 repositories. > > When I reboot the machine, /proc/mdstat shows this: > md_d0 : inactive sdc[2](S) > > I can stop the device, and attempt the --assemble the array correctly, > but something still is wrong: > > $ sudo mdadm --stop /dev/md_d0 > mdadm: stopped /dev/md_d0 > $ sudo mdadm --assemble /dev/md0 -fv /dev/sda /dev/sdb /dev/sdc /dev/sdd > mdadm: looking for devices for /dev/md0 > mdadm: /dev/sda is identified as a member of /dev/md0, slot 0. > mdadm: /dev/sdb is identified as a member of /dev/md0, slot 1. > mdadm: /dev/sdc is identified as a member of /dev/md0, slot 2. > mdadm: /dev/sdd is identified as a member of /dev/md0, slot 3. > mdadm: added /dev/sdb to /dev/md0 as 1 > mdadm: added /dev/sdc to /dev/md0 as 2 > mdadm: added /dev/sdd to /dev/md0 as 3 > mdadm: added /dev/sda to /dev/md0 as 0 > mdadm: /dev/md0 has been started with 3 drives (out of 4). > $ sudo cat /proc/mdstat > md0: active raid5 sda[0] sdc[2] sdb[1] > 2930287488 blocks level 5, 128k chunk, algorithm 2 [4/3] [UUU_] > > md_d0: inactive sdd[3](S) > 976762496 blocks > > Why, if it correctly identifies the devices that are members of > /dev/md0, and then adds them to /dev/md0, do I not get the complete > array? > -- > Stephan E Stachurski > -- 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
