Size=1.0T features=’0′ hwhandler=’0′ wp=rw /sdd 2 ways to Get the WWID ( SCSI ID ) of the disks on LinuxĮach LUN is mapped to a disk for which also a unique WWID is generated and the same can be used for representing them in the configuration as the device name may change post reboot while the WWID will not change and are reboot persistent.ģ624a937079ebbf3c903141360001149c dm-2 PURE ,FlashArray Start multipathd service with service command or systemctl command List the connected and scanned multipath devices on LinuxĮach multipath device has a World Wide Identifier (WWID), which is guaranteed to be globally unique and unchanging. Signer: Red Hat Enterprise Linux kernel signing key To make multipath work, we need make sure below module is loadedĭm_multipath 27427 4 dm_round_robin,dm_service_timeįilename: /lib/modules/3.10.0-693.21.1.el7.x86_64/kernel/drivers/md/dm-multipath.ko.xzĭescription: device-mapper multipath target Without DM Multipath, each path from a server node to a storage controller is treated by the system as a separate device, even when the I/O path connects the same server node to the same storage controller. Linux multipath provides a way of organizing the I/O paths logically, by creating a single multipath device on top of the underlying devices. Linux Multipath command is used to manage storage SAN ( storage area network) disks on OS side.
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