Legacy DSF

[Mousa55]

Hi,

i disable the Legacy DSF on my system and i using this command scsimgr lun_map to see lun path, i see some of them under
LUN PATH INFORMATION FOR LUN : /dev/rdisk/disk7

is

State = STANDBY
Last Open or Close state = STANDBY

How to change all to

State = ACTIVE
Last Open or Close state = ACTIVE


# scsimgr lun_map

LUN PATH INFORMATION FOR LUN : /dev/pt/pt0

Total number of LUN paths = 1
World Wide Identifier(WWID) =

LUN path : lunpath0
Class = lunpath
Instance = 0
Hardware path = 0/0/0/2/0/0/0.0x0.0x0
SCSI transport protocol = sas
State = UNOPEN
Last Open or Close state = ACTIVE


LUN PATH INFORMATION FOR LUN : /dev/rdisk/disk1

Total number of LUN paths = 1
World Wide Identifier(WWID) = 0x600508b1001ca0648b1e8d6bc84ca1a4

LUN path : lunpath1
Class = lunpath
Instance = 1
Hardware path = 0/0/0/2/0/0/0.0x0.0x4000000000000000
SCSI transport protocol = sas
State = ACTIVE
Last Open or Close state = ACTIVE


LUN PATH INFORMATION FOR LUN : /dev/rdisk/disk7

Total number of LUN paths = 4
World Wide Identifier(WWID) = 0x60060160fa112900cb08ec5bf152e011

LUN path : lunpath5
Class = lunpath
Instance = 5
Hardware path = 0/0/0/5/0/0/1.0x500601633b205530.0x0
SCSI transport protocol = fibre_channel
State = ACTIVE
Last Open or Close state = ACTIVE

LUN path : lunpath4
Class = lunpath
Instance = 4
Hardware path = 0/0/0/5/0/0/1.0x5006016b3b205530.0x0
SCSI transport protocol = fibre_channel
State = STANDBY
Last Open or Close state = STANDBY

LUN path : lunpath3
Class = lunpath
Instance = 3
Hardware path = 0/0/0/5/0/0/0.0x500601623b205530.0x0
SCSI transport protocol = fibre_channel
State = ACTIVE
Last Open or Close state = ACTIVE

LUN path : lunpath2
Class = lunpath
Instance = 2
Hardware path = 0/0/0/5/0/0/0.0x5006016a3b205530.0x0
SCSI transport protocol = fibre_channel
State = STANDBY
Last Open or Close state = STANDBY

Thanks

[Duncan Edmonstone]

Is this a LUN off an EVA by any chance (or an MSA or Clariion)?

In all cases these disk arrays are referred to as "ALUA" disk arrays (that's Assymetric Logical Unit Access), and what that means is that IOs for any given LUN are preferred to the ports on just one of the controllers of the arry. Hence you will see as many active paths and as many inactive paths as you have ports on each controller. This is normal and correct, and you should not try to chnage it.

HTH

Duncan

[Mousa55]

Hi,

How i can change the default multipath policy to active/active

and How i can disable the Persistent DSF and go to Legacy DSF and is there any effect for this operation.

Thanks