[dm-devel] user defined device name and table

[Stefan Bader]

2007/11/26, Pedro Bandim Faustino <pedro.faustino at fccn.pt>:
>
> Hi All,
>
> I have a working multipath on root, but some questions still unanswered.
> I'm hoping you can help me out ;)
>
> My setup details:
> Machine: IBM Blade Server HS21 with two Qlogic HBAs each connected to a
> FC switch with two active ports
> Storage IBM DS4700 with two controllers
> OS: Fedora 7
> DM packages:
>     - device-mapper-1.02.17-7.fc7
>     - device-mapper-libs-1.02.17-7.fc7
>     - device-mapper-multipath-0.4.7-11.fc7
> uname -r: 2.6.23.1-21.fc7
>
> At the moment this is what I have:
>
> Output of multipath -ll:
> mpath0 () dm-0 IBM,1814      FAStT
> [size=4.0G][features=0][hwhandler=0]
> \_ round-robin 0 [prio=4][active]
> \_ 2:0:0:0 sda 8:0   [active][ready]
> \_ 2:0:1:0 sdb 8:16  [active][ready]
> \_ 3:0:0:0 sdc 8:32  [active][ready]
> \_ 3:0:1:0 sdd 8:48  [active][ready]
>
> Output of df -k:
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/dm-2              3960348   1772124   1983800  48% /
> /dev/dm-1               101086     17593     78274  19% /boot
> tmpfs                  1037416         0   1037416   0% /dev/shm
>
> Contents of /dev/mapper/:
> crw-------  1 root root  10, 63 2007-11-26 13:58 control
> brw-rw----  1 root disk 253,  0 2007-11-26 13:58 mpath0
> brw-rw----  1 root disk 253,  1 2007-11-26 13:58 mpath0p1
> brw-rw----  1 root disk 253,  2 2007-11-26 13:58 mpath0p2
>
> But this is what I really would like to have:
>
> Output of multipath -ll:
> SRV07_BOOT (3600a0b8000295d64000009304742b4c8) dm-0 IBM,1814      FAStT
> [size=4.0G][features=1 queue_if_no_path][hwhandler=0]
> \_ round-robin 0 [prio=0][enabled]
> \_ 2:0:0:0 sda 8:0   [active][ready]
> \_ 3:0:0:0 sdc 8:32  [active][ready]
> \_ round-robin 0 [prio=6][active]
> \_ 2:0:1:0 sdb 8:16  [active][ready]
> \_ 3:0:1:0 sdd 8:48  [active][ready]
>
>
> I can modify the table by modifying the init script in the initrd image
> and then booting with the modified initrd image but I don't know how to
> change the name from mpath0 to SRV07_BOOT.


You should be able to change the name by creating a multipaths section like
below

multipaths {
    multipath {
        wwid "3600a0b8000295d64000009304742b4c8"
        alias "SRV07_BOOT"
    }
}

If that does not work as expected, you might have to say "no" to the user
friendly names option.

Any help will be very appreciated!!
>
> Thank you,
> Pedro Faustino
>
> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/dm-devel/attachments/20071126/30a00195/attachment.htm>