Hello all,
RHEL 5.6, I have one disk with PAV aliases and five disks without aliases in
Linux
lsdasd reports
0.0.0201 alias ECKD
0.0.0202 alias ECKD
0.0.0203 alias ECKD
0.0.0100 active dasda 94:0 ECKD 4096 10265MB 2628000
0.0.0101 active dasdb 94:4 ECKD 4096 10265MB 2628000
0.0.0102 active dasdc 94:8 ECKD 4096 25536MB 6537420
0.0.0103 active dasdd 94:12 FBA 512 256MB 524288
0.0.0104 active dasde 94:16 ECKD 4096 7042MB 1802880
0.0.0200 active dasdag 94:128 ECKD 4096 23033MB 5896620
Now I want dasdag to be multipathed while dasda-dasde to be ignored by
multipath.
So my first step was to use
blacklist {
devnode "dasda"
}
But it blacklists also dasdag !
[root@hqmalnx1 ~]# multipath -d -v 2|grep dasda
[root@hqmalnx1 ~]#
If I try
blacklist {
devnode "dasda." (see the dot at the end)
}
It will blacklist dasdag, that is expected, but not what I want to achieve
[root@hqmalnx1 ~]# multipath -d -v 2|grep dasda
\_ 0:0:256:0 dasda 94:0 [undef][ready]
So "dasda." works as expected, but "dasda" works more like "dasda*". The only
solution that worked for me was this
blacklist {
devnode "dasda"
}
blacklist_exceptions {
devnode "dasda."
...
[root@hqmalnx1 ~]# multipath -d -v 2|grep dasda
\_ 0:0:512:0 dasdag 94:128 [undef][ready]
\_ 0:0:513:0 dasdah 94:132 [undef][ready]
\_ 0:0:514:0 dasdai 94:136 [undef][ready]
\_ 0:0:515:0 dasdaj 94:140 [undef][ready]
Right now I am not sure if it will work also with dasd[a-z]. and similar. The
best solution would be if I can use just blacklist, no exceptions and it will
blacklist anything higher that dasdz.
Any ideas how to do that ?
Thank you
===================
Marian Gasparovic
===================
"The mere thought hadn't even begun to speculate about the merest
possibility of crossing my mind."
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