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." ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
