Red Hat DEVICE-MAPPER MULTIPATH 4.6 Configuration And Administration Manual page 23

device-mapper ioctl cmd 9 failed: Invalid argument
device-mapper ioctl cmd 14 failed: No such device or address
create: 3600a0b80001327d80000006d43621677
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:0 sdb
\_ 3:0:0:0 sdf
create: 3600a0b80001327510000009a436215ec
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:1 sdc
\_ 3:0:0:1 sdg
create: 3600a0b80001327d800000070436216b3
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:2 sdd
\_ 3:0:0:2 sdh
create: 3600a0b80001327510000009b4362163e
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:3 sde
\_ 3:0:0:3 sdi
2. In order to prevent the device mapper from mapping
devnode_blacklist
Although you could blacklist the
procedure since
/dev/sda
devices, you can blacklist using the WWID of that device.
Note that in the output to the
SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1. To blacklist this device, include
the following in the
devnode_blacklist {
wwid SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1
}
3. Run the following commands:
multipath -F
multipath -v2
The local disk or disks should no longer be listed in the new multipath maps, as shown in the
following example.
8:16
8:80
8:32
8:96
8:48
8:112
8:64
8:128
section of the
/etc/multipath.conf
device using a
sda
is not guaranteed to be the same on reboot. To blacklist individual
multipath -vs
/etc/multipath.conf
Ignoring Local Disks when Generating
in its multipath maps, edit the
/dev/sda
file to include this device.
type, that would not be safe
devnode
command, the WWID of the
file.
device is
/dev/sda
13