Hi Marian,
You may also try to use blacklist_exception parameter on multipath.conf.
You'd state:
blacklist {
devnode "*"
}
blacklist_exceptions {
devnode "/dev/sdag"
}
HTH,
Pedro
From: Marian Gasparovic <[email protected]>
To: [email protected]
Date: 31/08/2011 18:05
Subject: Re: multipath.conf question
Sent by: Linux on 390 Port <[email protected]>
Pedro,
this would be true for RHEL 6.1 which supports HyperPAV and also provides
transparent usage of PAVs. But it requires kernel 2.6.25+ while RHEL 5.6
is 2.6.17.
===================
Marian Gasparovic
===================
"The mere thought hadn't even begun to speculate about the merest
possibility of crossing my mind."
>________________________________
>From: Pedro Principeza <[email protected]>
>To: [email protected]
>Sent: Wednesday, August 31, 2011 9:33 PM
>Subject: Re: multipath.conf question
>
>Greetings!
>
>I might be absurdly wrong, but I guess PAV does not need dm-multipath to
>work, does it?
>My understanding came from the following presentation.
>
>http://www.vm.ibm.com/education/lvc/lvc0510c.pdf
>
>HTH,
>Pedro Principeza
>
>
>
>From: Marian Gasparovic <[email protected]>
>To: [email protected]
>Date: 31/08/2011 16:20
>Subject: multipath.conf question
>Sent by: Linux on 390 Port <[email protected]>
>
>
>
>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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