is it possible to HBA (disable paths from a particular HBA)

[skt_skt]

RHEL AS 3 update
I have erros reporting from one of the two HBA(two paths). which is causing performance issues. can i disable two paths from that particular HBA?? Need to disable A4&b4 paths only.

I dont know if it is possible to disabled card? and hot it impacts if done online??

#powermt display ports

Storage class = Symmetrix
==============================================================================
----------- Storage System --------------- -- I/O Paths -- --- Stats ---
ID Interface Wt_Q Total Dead Q-IOs Errors
==============================================================================

Storage class = CLARiiON
==============================================================================
----------- Storage System --------------- -- I/O Paths -- --- Stats ---
ID Interface Wt_Q Total Dead Q-IOs Errors
==============================================================================
APM00084701833 SP B5 256 2 0 0 0
APM00084701833 SP A5 256 2 0 0 0
APM00084701833 SP A4 256 2 0 1 4
APM00084701833 SP B4 256 2 1 0 2


powermt display dev=all

state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
1 QLogic Fibre Channel 2300 sdd SP B5 active alive 0 0
1 QLogic Fibre Channel 2300 sdf SP A5 active alive 0 0
2 QLogic Fibre Channel 2300 sdh SP A4 active alive 0 3
2 QLogic Fibre Channel 2300 sdj SP B4 active alive 0 1


state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
1 QLogic Fibre Channel 2300 sdc SP B5 active alive 0 0
1 QLogic Fibre Channel 2300 sde SP A5 active alive 0 0
2 QLogic Fibre Channel 2300 sdg SP A4 active alive 0 3
2 QLogic Fibre Channel 2300 sdi SP B4 active dead 0 1

[Ivan Ferreira · Accepted solution]

You can just run the "portdisable" command on the san switch (if fabric os based). If multipath is working correctly, it should be not a problem.