both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ?

AlexCHChong — Tue, 13 Oct 2015 07:26:10 GMT

HP-UX Admins,

My server currently is running HPVM with MCSC. The MSCS will manage the vm failover/online migrate.

i have both Native MPIO and EMC PowerMT enabled in HPUX 11.31 servers.

i check against the vm, powermt and native MPIO, i realiazed they using same /dev/rdisk/diskXX.
Example in below:-

hpvmstatus -V -P vm01 |grep rdisk
Physical Device : /dev/rdisk/disk181
Physical Device : /dev/rdisk/disk176

ioscan -m dsf output:

/dev/rdisk/disk176 /dev/rdsk/c21t0d2
/dev/rdsk/c23t0d2

/dev/rdisk/disk181 /dev/rdsk/c19t0d2
/dev/rdsk/c25t0d2

PowerMt output:

Pseudo name=disk181
Symmetrix ID=000298701698
Logical device ID=02AB
state=alive; policy=BasicFailover; priority=0; queued-IOs=0;
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path -- -- Stats ---
### HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
   5 0/0/0/5/0/0/1.0x50000975f01a894c.0x4002000000000000 c19t0d2   FA 4fA   active alive       0      0
   7 0/0/0/7/0/0/1.0x50000975f01a8940.0x4002000000000000 c25t0d2   FA 1fA   active alive       0      0

Pseudo name=disk176
Symmetrix ID=000298701699
Logical device ID=02AB
state=alive; policy=BasicFailover; priority=0; queued-IOs=0;
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path -- -- Stats ---
### HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
   5 0/0/0/5/0/0/1.0x50000975f01a8d4c.0x4002000000000000 c21t0d2   FA 4fA   active alive       0      0
   7 0/0/0/7/0/0/1.0x50000975f01a8d40.0x4002000000000000 c23t0d2   FA 1fA   active alive       0      0

Since both Multipath software are enabled. Am i safe to remove the EMC PowerMT ?

Regards,

AlexCHChong

Re: both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ?

Bill Hassell — Wed, 21 Oct 2015 00:02:56 GMT

Remove the EMC Powerpath. Not only is it redundant, the native multipathing and Powerpath will interfere with each other and reduce performance.

Re: both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ?

chindi — Fri, 01 Jan 2016 06:32:21 GMT

Please remove EMC Powerpath , we too had faced a reboot when we had kept both Softwares.

topic Re: both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ? in Operating System - HP-UX

both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ?

Re: both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ?

Re: both EMC PowerMT and HPUX native MPIO enabled. Am i safe to remove the EMC PowerMT ?