For every multipath disk label in /dev/mapper
I have another with 1 in the end. Are they the same? is there some relationship?
For example:
/dev/mapper/mpathaj
and /dev/mapper/mpathaj1
or
/dev/mapper/mpathai
and /dev/mapper/mpathai1
when I issue the command od --read-bytes=128 --format=c /dev/mapper/mpathai
, the disk seems clean:
[root@server02 ~]# od --read-bytes=128 --format=c /dev/mapper/mpathai
0000000 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
0000200
But the other with 1 in the end show some rows:
[root@server02 ~]# od --read-bytes=128 --format=c /dev/mapper/mpathai1
0000000 001 202 001 001 \0 \0 \0 \0 003 \0 \0 200 220 . 5 213
0000020 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000120 3 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
some characters I needed to remove to don't show costumer content.
0000160 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000200
That happen to every disk. One is clean and the other no.
And, the reason I am asking it: Can I lost one (mpathaj) without lost the other (mpathaj1)? I've seen they point to different /dev/dm-xx
.
ie: /dev/mapper/mpathaj
is /dev/dm-18
and /dev/mapper/mpathaj1
is /dev/dm-19