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Verifying storage connectivity

Before replacing bridges, you should verify bridge and storage connectivity. Familiarizing yourself with the command output enables you to subsequently confirm connectivity after making configuration changes.

About this task

You can issue these commands from the admin prompt of any of the controller modules in the MetroCluster configuration at the site undergoing maintenance.
Confirm connectivity to the disks by entering the following command on any one of the MetroCluster nodes: run local sysconfig -v

The output shows the disks attached to the initiator ports on the controller, and identifies the shelves connected to the FC-to-SAS bridges:

Example

node_A_1> run local sysconfig -v
Lenovo Release 9.6P5: Fri Dec 13 13:23:47 EST 2019
System ID: 4068741258 (node_A_1); partner ID: 4068741260 (node_B_1)
System Serial Number: 940001025471 (node_A_1)
System Rev: A4
System Storage Configuration: Multi-Path HA<=== Configuration should be multi-path HA
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slot 0: FC Host Adapter 0g (QLogic 8324 rev. 2, N-port, <UP>)<=== Initiator port
Firmware rev:      7.5.0
Flash rev:         0.0.0
Host Port Id:      0x60130
FC Node Name:      5:00a:098201:bae312
FC Port Name:      5:00a:098201:bae312
SFP Vendor:        UTILITIES CORP.
SFP Part Number:   FTLF8529P3BCVAN1
SFP Serial Number: URQ0Q9R
SFP Capabilities:  4, 8 or 16 Gbit
Link Data Rate:    16 Gbit
Switch Port:       brcd6505-fcs40:1
  <List of disks visible to port>
 ID     Vendor   Model            FW    Size
brcd6505-fcs29:12.126L1527     : LENOVO   X302_HJUPI01TSSM NA04 847.5GB (1953525168 512B/sect)
brcd6505-fcs29:12.126L1528     : LENOVO   X302_HJUPI01TSSA NA02 847.5GB (1953525168 512B/sect)
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<List of FC-to-SAS bridges visible to port>
FC-to-SAS Bridge:
brcd6505-fcs40:12.126L0        : ATTO     FibreBridge6500N 1.61  FB6500N102980
brcd6505-fcs42:13.126L0        : ATTO     FibreBridge6500N 1.61  FB6500N102980
brcd6505-fcs42:6.126L0         : ATTO     FibreBridge6500N 1.61  FB6500N101167
brcd6505-fcs42:7.126L0         : ATTO     FibreBridge6500N 1.61  FB6500N102974
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  <List of storage shelves visible to port>
brcd6505-fcs40:12.shelf6: DS4243  Firmware rev. IOM3 A: 0200  IOM3 B: 0200
brcd6505-fcs40:12.shelf8: DS4243  Firmware rev. IOM3 A: 0200  IOM3 B: 0200
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