Hi, this is not a big issue, but I'm unsatisfied with the output of mdadm -Dsv. I'm using mdadm 3.0.
Here's the output on one machine:
ARRAY /dev/md/0level=raid1 num-devices=2 metadata=0.90 UUID=91407351:9059f7b0:38ae7154:38049e4e
devices=/dev/sdb1,/dev/sda1
ARRAY /dev/md/1level=raid1 num-devices=2 metadata=0.90 UUID=d1776dd8:db91f423:99830b25:d3f7cedd
devices=/dev/sdc1,/dev/sdb3
The devices are shown as "/dev/md/n" instead of "/dev/mdn", and there's no space before "level".
On another machine I got:
ARRAY /dev/md1level=raid1 num-devices=2 metadata=0.90 UUID=88c8442e:4f17f837:bde095a2:d13819de
devices=/dev/sdc1,/dev/sdd1
ARRAY /dev/md0level=raid10 num-devices=4 metadata=0.90 UUID=95e59d50:2eae3beb:bde095a2:d13819de
devices=/dev/sda3,/dev/sdb1,/dev/sdc2,/dev/sdd2
Here it's showing "/dev/mdn", but again there's no space before "level", and the devices are not in order.
Third machine:
ARRAY /dev/md/0_0level=raid1 num-devices=2 metadata=0.90 UUID=24302b7f:d959dadb:5af0b895:7edd2b0f
devices=/dev/sdb1,/dev/sda1
ARRAY /dev/md/3_0level=raid10 num-devices=4 metadata=0.90 UUID=19f4b34c:0ec56553:6bb0b7af:9ec1922b
devices=/dev/sda3,/dev/sdb3,/dev/sdc3,/dev/sdd3
ARRAY /dev/md/2_0level=raid1 num-devices=2 metadata=0.90 UUID=d232d5b6:7d276c52:b7fe7b09:538f0c09
devices=/dev/sdc2,/dev/sdd2
ARRAY /dev/md/1_0level=raid1 num-devices=2 metadata=0.90 UUID=2337ad91:997bfcc0:53f8cadc:1d167f18
devices=/dev/sdc1,/dev/sdd1
Back to "/dev/md/n", but now there's an extra "_0" ?! Where did that come from?
Again, no space and not in order.
And on a 4th machine, the output is similar to the 3rd one.
All machines are running Gentoo Linux amd64 and the same mdadm version (3.0)
Another question is whether there's another way to output this information, that's more consistent, and more suitable for parsing by a program.
Thanks
Adrian
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