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182 Configuration: Device Mapper Multipath for Linux
# multipath –ll
The output must be similar to this example, which shows the output for one
mapped virtual disk.
mpath1 (3600a0b80005ab177000017544a8d6b92) dm-0 DELL,
MD32xx
[size=5.0G][features=3 queue_if_no_path
pg_init_retries 50][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=6][active]
\_ 5:0:0:0 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 4:0:0:0 sdb 8:16 [active][ghost]
where:
mpath1 is the name of the virtual device created by device mapper. It is
located in the /dev/mapper directory.
DELL is the vendor of the device
MD3200 is the model of the device
Sdc is the physical path to the owning controller for the device
Sdb is the physical path to the non-owning controller for the device
The following is an example of SLES output:
mpathb(360080e500017b2f80000c6ca4a1d4ab8) dm-21
DELL,MD32xx
[size=1.0G][features=3 queue_if_no_path
pg_init_retries 50][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=6][active]
\_ 4:0:0:22 sdx 65:112 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 6:0:0:22 sdcl 69:144 [active][ghost
where:
mpathb is the name of the virtual device created by device mapper. It is
located in the /dev/mapper directory.
book.book Page 182 Tuesday, September 27, 2011 3:25 PM