3.2. 在生成多路径设备时忽略逻辑磁盘
Some machines have local SCSI cards for their internal disks. DM Multipath is not recommended for these devices. If you set the
find_multipaths
configuration parameter to yes
, you should not have to blacklist these devices. For information on the find_multipaths
configuration parameter, see 第 4.3 节 “配置文件默认设置”.
If you do not set the
find_multipaths
configuration parameter to yes
, can use the following procedure to modify the multipath configuration file to ignore the local disks when configuring multipath.
- 确定哪些磁盘是内部磁盘并将其列入黑名单。In this example,
/dev/sda
is the internal disk. Note that as originally configured in the default multipath configuration file, executing themultipath -v2
command shows the local disk,/dev/sda
, in the multipath map.This examples specifies the-d
option of themultipath
command to indicate that this is a dry run that will not create the multipath devices. For further information on themultipath
command output, see 第 5.7 节 “Multipath Command Output”.Copy to Clipboard Copied! Toggle word wrap Toggle overflow - In order to prevent the device mapper from mapping
/dev/sda
in its multipath maps, edit the blacklist section of the/etc/multipath.conf
file to include this device. Although you could blacklist thesda
device using adevnode
type, that would not be a safe procedure since/dev/sda
is not guaranteed to be the same on reboot. To blacklist individual devices, you can blacklist using the WWID of that device.请注意:在multipath -v2
命令的输出中,/dev/sda
设备的 WWID 是 SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1。要将这个设备列入黑名单,请在/etc/multipath.conf
文件中添加以下内容。blacklist { wwid SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1 }
blacklist { wwid SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1 }
Copy to Clipboard Copied! Toggle word wrap Toggle overflow - 在您更新
/etc/multipath.conf
文件后,您必须手动让multipathd
守护进程重新载入该文件。以下命令可重新载入更新的/etc/multipath.conf
文件。systemctl reload multipathd.service
# systemctl reload multipathd.service
Copy to Clipboard Copied! Toggle word wrap Toggle overflow