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artRanade

updated

11 years ago

A

artRanade

46 Posts

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4365

February 8th, 2016 11:00

powermt returns paths which map to multiple LUNs

Hello

We are running powermt command which displays the paths

e.g

Pseudo name=emcpoweraw

VPLEX ID=FNM00133700251

Logical device ID=6000144000000010F07C657BBC13D312

state=alive; policy=ADaptive; queued-IOs=0

==============================================================================

--------------- Host --------------- - Stor - -- I/O Path -- -- Stats ---

### HW Path I/O Paths Interf. Mode State Q-IOs Errors

==============================================================================

  4 qla2xxx sdla 04 active alive 0 1

  4 qla2xxx sdjx 04 active alive 0 1

  4 qla2xxx sdiu 04 active alive 0 1

  3 qla2xxx sdw 0D active alive 0 1

  3 qla2xxx sdbh 09 active alive 0 1

  4 qla2xxx sdci 04 active alive 0 2

  3 qla2xxx sddm 01 active alive 0 1

  4 qla2xxx sdep 0C active alive 0 2

  3 qla2xxx sdfs 05 active alive 0 1

  4 qla2xxx sdgo 00 active alive 0 2

  4 qla2xxx sdhr 08 active alive 0 2

If we trace back the LUNs for sdla, sdjx etc, we expect all the paths mapping to same LUN.

However we are getting multiple LUNs.

e.g

lrwxrwxrwx 1 root root 0 Jun 26 00:07

/sys/class/scsi_host/host4/device/rport-4:0-0/target4:0:0/fc_transport:target4:0:0/device/4:0:0:49173/block:sdla

-> ../../../../../../../../block/sdla

Similarly for others....

lrwxrwxrwx 1 root root 0 Jun 26 00:07

/sys/class/scsi_host/host4/device/rport-4:0-0/target4:0:0/fc_transport:target4:0:0/device/4:0:0:32789/block:sdjx

-> ../../../../../../../../block/sdjx

lrwxrwxrwx 1 root root 0 Jun 26 00:07

/sys/class/scsi_host/host4/device/rport-4:0-0/target4:0:0/fc_transport:target4:0:0/device/4:0:0:16404/block:sdiu

-> ../../../../../../../../block/sdiu

lrwxrwxrwx 1 root root 0 Feb 20 2015

/sys/class/scsi_host/host3/device/rport-3:0-0/target3:0:0/fc_transport:target3:0:0/device/3:0:0:22/block:sdw

-> ../../../../../../../../block/sdw

Why multiple paths pointing to different lun #  ? Is this possible and what does it indicate.