Configuration: Device Mapper Multipath for Linux 201
Create a File System on a Device Mapper Partition
Use the standard mkfs command to create the file system on the newly
created Device Mapper partition.
For example:
# mkfs –t <filesystem type> /dev/mapper/<partition
node>
where <partition node> is the partition on which the file system is
created.
Mount a Device Mapper Partition
Use the standard mount command to mount the Device Mapper partition:
# mount /dev/mapper/<partition_node> <mounting_point>
Ready For Use
The newly created virtual disks created on the MD3600i Series array are now
setup and ready to be used. Future reboots automatically find multipathing
devices along with their partitions.
NOTE: To ensure data integrity protection, reboot a Linux host server attached to
an MD3600i Series storage array using the procedure given below.
Blacklist Local Drive in Multi-path Driver
If your multipath drivers are connecting to storage area networks (SANs), it
may be useful to be able to exclude or "blacklist" certain devices in your
/etc/multipath.conf file. Blacklisting prevents the multipath driver from
attempting to use those local devices.
To blacklist a local drive or device:
1
Run the
multipath -l
command to determine the local drive or
device WWID (World-Wide Identifier) or vendor/model string.
2
Edit the
/etc/multipath.conf
file as follows:
blacklist {
wwid drive_wwid
…
}
book.book Page 201 Tuesday, September 27, 2011 3:13 PM
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