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When the Linux host first accesses a new SCSI device (LUN), there is no partition or file system. If you want to use a partitioned multipath device, you must first partition the underlying SCSI devices. You might also want to create logical volumes on multipath devices, and optionally create a file system. |
When the Linux host first accesses a new SCSI device (LUN), there is no partition or file system. If you want to use a partitioned multipath device, you must first partition the underlying SCSI devices. You might also want to create logical volumes on multipath devices, and optionally create a file system.
SCSI devices and corresponding multipath devices must have been discovered by the Linux host.
At a minimum DM-Multipath should be configured on the SCSI devices. Any configuration beyond DM-Multipath is optional. The following steps are general guidelines if you wish to perform additional configuration, such as partitioning, configuring logical volumes on multipath devices, and creating a file system. For details on Linux commands, refer to Red Hat Enterprise Linux documentation and man pages.
-
To use a partitioned multipath device, first partition the underlying SCSI devices using the
fdisk
orparted
utility. -
Create corresponding multipath partitions using the
kpartx
utility. -
Create logical volumes on corresponding multipath devices using Logical Volume Manager (LVM) commands.
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Create a file system, such as Ext4 or XFS, on logical volumes or multipath devices using the
mkfs
utility.