Thread: 11.04 RAID (re)install issues

while raid arrays complete resync, thought i'd jot quick line see if had thoughts why seeing following sfdisk error regard status of raid arrays?

code:

sfdisk: error: sector 0 not have msdos signature  /dev/md0: unrecognised partition table type no partitions found

i have completed "clean" install of 11.04 (from composing note) - replacing existing 3-disk (sda, sdb, sdc) raid/lvm set-up (8.10).

disk1 - sda 250 gb
disk2 - sdb 1 tb
disk3 - sdc 1 tb

data backed-up.

chose not keep olde raid/lvm configuration, there changes wanted implement....

i'd resolve raid errors before configuring lvm.

my current(ly resync-ing) raid configuration:

md0
sda1 raid1 /boot
sdb1 raid1 /boot
sdc1 raid1 /boot

md1
sda3 raid5 /
sdb3 raid5 /
sdc3 raid5 /

md2
sdb4 raid1 /shared
sdc4 raid1 /shared

i have (non-raid) swap on:

sda2
sdb2
sdc2

$ cat /proc/mdstat

code:

personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]  md2 : active raid1 sdb4[0] sdc4[1]       731546488 blocks super 1.2 [2/2] [uu]       [==>..................]  resync = 10.2% (74791168/731546488) finish=192.0min speed=56984k/sec        md0 : active raid1 sdc1[2] sdb1[1] sda1[0]       487412 blocks super 1.2 [3/3] [uuu]        md1 : active raid5 sdb3[1] sda3[0] sdc3[2]       485460992 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [uuu]        unused devices: <none> $

$ sudo sfdisk -l -us

code:

disk /dev/sda: 30522 cylinders, 255 heads, 63 sectors/track units = sectors of 512 bytes, counting 0     device boot    start       end   #sectors  id  system /dev/sda1   *      2048    976895     974848  fd  linux raid autodetect /dev/sda2        976896   4882431    3905536  82  linux swap / solaris /dev/sda3       4882432 490346495  485464064  fd  linux raid autodetect /dev/sda4             0         -          0   0  empty <-----curious?  disk /dev/sdc: 121601 cylinders, 255 heads, 63 sectors/track units = sectors of 512 bytes, counting 0     device boot    start       end   #sectors  id  system /dev/sdc1   *      2048    976895     974848  fd  linux raid autodetect /dev/sdc2        976896   4882431    3905536  82  linux swap / solaris /dev/sdc3       4882432 490428415  485545984  fd  linux raid autodetect /dev/sdc4     490428416 1953523711 1463095296  fd  linux raid autodetect  disk /dev/sdb: 121601 cylinders, 255 heads, 63 sectors/track units = sectors of 512 bytes, counting 0     device boot    start       end   #sectors  id  system /dev/sdb1   *      2048    976895     974848  fd  linux raid autodetect /dev/sdb2        976896   4882431    3905536  82  linux swap / solaris /dev/sdb3       4882432 490428415  485545984  fd  linux raid autodetect /dev/sdb4     490428416 1953523711 1463095296  fd  linux raid autodetect  disk /dev/md1: 121365248 cylinders, 2 heads, 4 sectors/track  sfdisk: error: sector 0 not have msdos signature  /dev/md1: unrecognised partition table type no partitions found  disk /dev/md0: 121853 cylinders, 2 heads, 4 sectors/track  sfdisk: error: sector 0 not have msdos signature  /dev/md0: unrecognised partition table type no partitions found  disk /dev/md2: 182886622 cylinders, 2 heads, 4 sectors/track  sfdisk: error: sector 0 not have msdos signature  /dev/md2: unrecognised partition table type no partitions found $

thanks insight!

just quick follow-up - arrays have completed resync , errors remain same....

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