On Wed, 16 Jan 2008, Justin Piszcz wrote:
p34:~# mdadm /dev/md3 --zero-superblock
p34:~# mdadm --examine --scan
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=f463057c:9a696419:3bcb794a:7aaa12b2
ARRAY /dev/md1 level=raid1 num-devices=2
UUID=98e4948c:c6685f82:e082fd95:e7f45529
ARRAY /dev/md2 level=raid1 num-devices=2
UUID=330c9879:73af7d3e:57f4c139:f9191788
ARRAY /dev/md3 level=raid0 num-devices=10
UUID=6dc12c36:b3517ff9:083fb634:68e9eb49
p34:~#
I cannot seem to get rid of /dev/md3, its almost as if there is a piece of it
on the root (2) disks or reference to it?
I also dd'd the other 10 disks (non-root) and /dev/md3 persists.
Hopefully this will clear it out:
p34:~# for i in /dev/sd[c-l]; do /usr/bin/time dd if=/dev/zero of=$i bs=1M
& done
[1] 4625
[2] 4626
[3] 4627
[4] 4628
[5] 4629
[6] 4630
[7] 4631
[8] 4632
[9] 4633
[10] 4634
p34:~#
Good aggregate bandwidth at least writing to all 10 disks.
procs -----------memory---------- ---swap-- -----io---- -system------cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 9 0 46472 7201008 73424 0 0 0 658756 2339 2242 0 22 24 54
3 10 0 44132 7204680 73292 0 0 0 660040 2335 2276 0 22 19 59
5 8 0 48196 7201840 73736 0 0 0 652708 2403 1645 0 23 11 66
2 9 0 45728 7205036 72628 0 0 0 659844 2296 1891 0 23 11 66
0 11 0 47672 7202992 72564 0 0 0 672856 2327 1616 0 22 7 71
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