EMC Failover

glenioborges · #1 (**permalink**) 3 Weeks Ago

Hi guys,

I'm running vxdmp and powerpath at the same time. Vxdmp for internal disks and powerpath for external.

The problem is that, on the failover tests which a fiber cable should be removed, the system cannot recognize the disks.

Any hints on how to configure powerpath in order to correctly handle the failover?

Thank you

System Shock · #2 (**permalink**) 3 Weeks Ago

What do you mean by "the system cannot recognize the disks"? Do you mean the OS loses visibility to the data in the SAN? Disconnecting the fiber cable should not prevent the OS from recognizing the volume presented by Powerpath.

What's the output of

Code:

powermt display dev=all

glenioborges · #3 (**permalink**) 3 Weeks Ago

Thank you for replying.

What I mean is that after removing one cable, command like "format" and "vxdisk -o alldgs list", keep searching for disks and don't show any.

Here is the "powermt display" output, in a normal situation (with the 2 FC connected)

Code:

# powermt display dev=all
Pseudo name=emcpower2a
CLARiiON ID=CKM00092300238 [MECO_MMAIN]
Logical device ID=6006016058C022002E52A213DAB4DE11 [FMM]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B       Array failover mode: 4
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601613CE03792d1s0 SP A1     active  alive      0      0
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601693CE03792d1s0 SP B1     active  alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601603CE03792d1s0 SP A0     unlic   alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601683CE03792d1s0 SP B0     unlic   alive      0      0
Pseudo name=emcpower1a
CLARiiON ID=CKM00092300238 [MECO_MMAIN]
Logical device ID=6006016058C02200460681D6DAB4DE11 [DATAFILES]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 4
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601613CE03792d2s0 SP A1     active  alive      0      0
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601693CE03792d2s0 SP B1     active  alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601603CE03792d2s0 SP A0     unlic   alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601683CE03792d2s0 SP B0     unlic   alive      0      0
Pseudo name=emcpower3a
CLARiiON ID=CKM00092300238 [MECO_MMAIN]
Logical device ID=6006016058C022006E6BCACED9B4DE11 [ORACLE]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B       Array failover mode: 4
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601613CE03792d0s0 SP A1     active  alive      0      0
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601693CE03792d0s0 SP B1     active  alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601603CE03792d0s0 SP A0     unlic   alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601683CE03792d0s0 SP B0     unlic   alive      0      0
Pseudo name=emcpower0a
CLARiiON ID=CKM00092300238 [MECO_MMAIN]
Logical device ID=6006016058C0220080DD3656DAB4DE11 [BGW]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 4
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601613CE03792d3s0 SP A1     active  alive      0      0
3074 pci@0/pci@0/pci@8/pci@0/pci@1/SUNW,qlc@0/fp@0,0 c2t500601693CE03792d3s0 SP B1     active  alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601603CE03792d3s0 SP A0     unlic   alive      0      0
3072 pci@0/pci@0/pci@8/pci@0/pci@9/SUNW,qlc@0/fp@0,0 c3t500601683CE03792d3s0 SP B0     unlic   alive      0      0

Please use code tags...(VBE)

System Shock · #4 (**permalink**) 3 Weeks Ago

According to this output, you don't have a license. Do you have a license for Powerpath? Have you installed the license with emcpreg ?

glenioborges · #5 (**permalink**) 3 Weeks Ago

Thank you for replying.

You right, I didn't apply the correct license. But this couldn't solve the problem.

But I found a way to disable the dmp feature that was handling the storage at the same time as powerpath. Using the following commands:

# vxddladm settune monitor_fabric=off
# vxdmpadm settune dmp_probe_idle_lun=off

Cheers

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