Symptoms

All the paths are place in asb:prox for a non-distributed volume. eg:- Pseudo name=emcpower8 VPLEX ID=CKM00AAAAAAAA Logical device ID=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Standard UID=naa.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx type=Conventional; state=alive; policy=ADaptive; queued-IOs=0 ====================================================== --------------- Host --------------- - Stor - -- I/O Path -- -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ====================================================== 3 vmhba1 C0:T0:L14 CL2-00 asb:prox alive 0 1 2 vmhba2 C0:T1:L14 CL2-03 asb:prox alive 0 0 3 vmhba1 C0:T2:L14 CL2-01 asb:prox alive 0 0 2 vmhba2 C0:T3:L14 CL2-02 asb:prox alive 0 1 Pseudo name=emcpower0 VPLEX ID=CKM00AAAAAAAA , CKM00BBBBBBBB Logical device ID=yyyyyyyyyyyyyyyyyyyyyyyyyyyyy Standard UID=naa.yyyyyyyyyyyyyyyyyyyyyyyyyyyyy type=Conventional; state=alive; policy=ADaptive; queued-IOs=0 ====================================================== --------------- Host --------------- - Stor - -- I/O Path -- -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ====================================================== 1 vmhba4 C0:T2:L0 CL2-03 asb:prox alive 0 0 1 vmhba4 C0:T3:L0 CL2-02 asb:prox alive 0 1 4 vmhba3 C0:T2:L0 CL2-01 asb:prox alive 0 0 4 vmhba3 C0:T1:L0 CL2-00 asb:prox alive 0 1 1 vmhba4 C0:T1:L0 CL1-03 active alive 0 0 4 vmhba3 C0:T3:L0 CL1-00 active alive 0 0 4 vmhba3 C0:T0:L0 CL1-01 active alive 0 0 1 vmhba4 C0:T0:L0 CL1-02 active alive 0 0

Cause

Resolution

PowerPath detects the most optimal paths (local paths) and places the remote paths in autostandby mode. In mixed environments (VPLEX clusters with paths configured to cross-connected distributed volumes as well as paths configured to non-distributed volumes), the paths to the non-distributed volume inherit the cluster mode allocation that the proximity algorithm applies to its VPLEX cluster. For example, the PowerPath proximity algorithm designates a VPLEX cluster as local and preferred for a crossconnected, distributed volume on the host. After the distributed volume is designated as local, all paths to that cluster will be set as active. In addition, even if there is a non-distributed volume in the cluster, paths to that non-distributed volume are also set as active. This setting is inherited from the global setting set on the VPLEX cluster. In some scenario all paths to a volume are in asb:prox, then PowerPath/VE selects paths for I/O as if all paths are active.