How to enable emcp controller under Veritas

Question

Hi,

I want PowerPath software to control multipathing, not Veritas. How to set the CTRL-NAME as emcp and remove the c1 and c2 and how to remove those c#t#d# devices from the view of veritas.

Below are some command outputs to explain the scenario:

From 'vxdisk list' I am getting:

DEVICE TYPE DISK GROUP STATUS
EMC_CLARiiON0_0 auto:cdsdisk - - online

# vxdisk list EMC_CLARiiON0_0
Device: EMC_CLARiiON0_0
devicetag: EMC_CLARiiON0_0
type: auto
hostid:
disk: name= id=1238604637.195.erpapptest
group: name= id=
info: format=cdsdisk,privoffset=256,pubslice=2,privslice=2
flags: online ready private autoconfig autoimport
pubpaths: block=/dev/vx/dmp/EMC_CLARiiON0_0s2 char=/dev/vx/rdmp/EMC_CLARiiON0_0s2
guid: {393d0562-1dd2-11b2-85dd-0003ba9b4c16}
udid: DGC%5FCLARiiON%5FCK200041600485%5F60060160EB3C1C00D0A2647ECB70DC11
site: -
version: 3.1
iosize: min=512 (bytes) max=2048 (blocks)
public: slice=2 offset=65792 len=20904448 disk_offset=0
private: slice=2 offset=256 len=65536 disk_offset=0
update: time=1238604655 seqno=0.2
ssb: actual_seqno=0.0
headers: 0 240
configs: count=1 len=48144
logs: count=1 len=7296
Defined regions:
config priv 000048-000239[000192]: copy=01 offset=000000 disabled
config priv 000256-048207[047952]: copy=01 offset=000192 disabled
log priv 048208-055503[007296]: copy=01 offset=000000 disabled
lockrgn priv 055504-055647[000144]: part=00 offset=000000
Multipathing information:
numpaths: 5
state=disabled type=secondary
c1t5006016210602B24d2s2 state=enabled type=secondary
c1t5006016A10602B24d2s2 state=enabled type=primary
c2t5006016110602B24d2s2 state=enabled type=secondary
c2t5006016910602B24d2s2 state=enabled type=primary

# vxdmpadm listctlr all
CTLR-NAME ENCLR-TYPE STATE ENCLR-NAME
=====================================================
c2 EMC_CLARiiON ENABLED EMC_CLARiiON0
c1 EMC_CLARiiON ENABLED EMC_CLARiiON0

# powermt display dev=emcpower57a
Pseudo name=emcpower57a
CLARiiON ID=CK200041600485 [TEST]
Logical device ID=60060160EB3C1C00D0A2647ECB70DC11 [LUN 298]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
3075 pci@8,600000/SUNW,qlc@2/fp@0,0 c1t5006016210602B24d2s0 SP A2 active alive 0 0
3075 pci@8,600000/SUNW,qlc@2/fp@0,0 c1t5006016A10602B24d2s0 SP B2 active alive 0 0
3072 pci@8,600000/SUNW,qlc@2,1/fp@0,0 c2t5006016110602B24d2s0 SP A1 active alive 0 0
3072 pci@8,600000/SUNW,qlc@2,1/fp@0,0 c2t5006016910602B24d2s0 SP B1 active alive 0 0

Thanks ahead,

Ashfaq

Ramiro · Answer

Hi Ashfaq, It would be useful to know the version of Veritas & PP but I will assume you are running VxVM 5.0 and you would like to see power devices instead of native ones:

Use the following procedure to make vxdisk list display devices consistently:

1. Change all devices to native TPD mode.
# vxdmpadm setattr enclosure tpdmode=native

2. Verify all devices are now in native TPD mode.
# vxdisk list

3. Change all devices to pseudo TPD mode.
# vxdmpadm setattr enclosure tpdmode=pseudo

4. Verify all devices are now in pseudo TPD mode.
# vxdisk list

instead of showing up as c2t17d158s2 auto:sliced it should now show up as emcpower49s2 auto:cdsdisk

In addition I would do the following also:

1)powermt check (Choose "A" for all. Clear the dead paths.)
2)devfsadm -C (Scan the SCSI bus.)
3)powercf -q (Rebuild the logical link layer.)
4)powermt config (Bring the device paths into PowerPath control.)
5)powermt restore (Trespass LUNs to their default owners.)
6) powermt save (Save the current configuration.)

Ideally you want to have PP installed prior to Veritas.

Hope this helps.

PowerPath

How to enable emcp controller under Veritas

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