Mapping between "Pseudo name" and "Logical device ID" in powerpath with SVM changed....

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1

Dear All,

I was having powerpath 5.2 on SUN server with SVM connected to CLARIION box.Please find the following output :

root # powermt display dev=all
Pseudo name=emcpower3a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160685D1E004DD97FB647BFDC11 [LUN 147]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 1
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
1280 pci@8,600000/QLGC,qla@1   c1t0d0s0  SP B1     active  alive      0      0
1280 pci@8,600000/QLGC,qla@1   c1t1d0s0  SP A0     active  alive      0      1
Pseudo name=emcpower2a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160685D1E005E4F2DBD47BFDC11 [LUN 149]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 1
==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
1280 pci@8,600000/QLGC,qla@1   c1t0d2s0  SP A0     active  alive      0      0
1280 pci@8,600000/QLGC,qla@1   c1t1d2s0  SP B1     active  alive      0      1
Pseudo name=emcpower1a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160B7061F00F875E8B947BFDC11 [LUN 148]
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
==============================================================================
1280 pci@8,600000/QLGC,qla@1   c1t0d1s0  SP A0     active  alive      0      0
1280 pci@8,600000/QLGC,qla@1   c1t1d1s0  SP B1     active  alive      0      1
Pseudo name=emcpower0a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160B7061F00F975E8B947BFDC11 [LUN 150]
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
==============================================================================
1280 pci@8,600000/QLGC,qla@1   c1t0d3s0  SP A0     active  alive      0      0
1280 pci@8,600000/QLGC,qla@1   c1t1d3s0  SP B1     active  alive      0      1

What I did is I removed the powerpath 5.2 and installed the pakage of powerpath 5.3.But due to this activity the mapping between "Pseudo name" and "Logical device ID" changed due to unknown reason.Now the new output looks like follow :

root # powermt display dev=all
Pseudo name=emcpower2a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160685D1E004DD97FB647BFDC11 [LUN 147]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0;
Owner: default=SP A, current=SP A       Array failover mode: 1
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---
###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
1280 pci@8,600000/QLGC,qla@1  c1t0d0s0  SP A0     active  alive       0      0
1280 pci@8,600000/QLGC,qla@1  c1t1d0s0  SP B1     active  alive       0      0
Pseudo name=emcpower1a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160685D1E005E4F2DBD47BFDC11 [LUN 149]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0;
Owner: default=SP A, current=SP A       Array failover mode: 1
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---
###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
1280 pci@8,600000/QLGC,qla@1  c1t0d2s0  SP A0     active  alive       0      0
1280 pci@8,600000/QLGC,qla@1  c1t1d2s0  SP B1     active  alive       0      0
Pseudo name=emcpower3a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160B7061F00F875E8B947BFDC11 [LUN 148]
state=alive; policy=BasicFailover; 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
==============================================================================
1280 pci@8,600000/QLGC,qla@1  c1t0d1s0  SP A0     active  alive       0      0
1280 pci@8,600000/QLGC,qla@1  c1t1d1s0  SP B1     active  alive       0      0
Pseudo name=emcpower0a
CLARiiON ID=CK200073400372 [D039XSAP46]
Logical device ID=60060160B7061F00F975E8B947BFDC11 [LUN 150]
state=alive; policy=BasicFailover; 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
==============================================================================
1280 pci@8,600000/QLGC,qla@1  c1t0d3s0  SP A0     active  alive       0      0
1280 pci@8,600000/QLGC,qla@1  c1t1d3s0  SP B1     active  alive       0      0

So, please tell me how can I restore the mapping between "Pseudo name" and "Logical device ID" in powerpath 5.3 with SVM as it was previous.

Thanks...

2

Hi,

To rename pseudo name with powerpath you can use the emcpadm tools.

emcpadm getusedpseudos
emcpadm getfreepseudos
emcpadm renamepseudo -s <src pseudo device name> -t <tgt pseudo device name>

To recover the old pseudo name, you must first assign current pseudo name to free pseudos, then fill the old pseudo with the real device name.

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