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mike7645
Contributor
Contributor

Help with lost iSCSI paths

Have an IBM DS3300 SAN with dual controllers (4 total iSCSI interfaces on the SAN), 2 3560G switches, and (1) dual port QLogic iSCSI card in each of 2 clustered servers. I have (2) 1TB LUNs, each accessible to both hosts. I was doing some failover testing by unplugging the switch. Now that everything is powered back on, the SAN in inaccessible from 1 host. At first, it showed that the paths were dead. Now they are not there at all. How can I get the paths to show up back on host that lost them? I've tried rescanning the HBAs to no avail.

Also, I'm questioning if my config is good now. Is 1 dual port card in each server enough to acheive redundancy against one switch going down? Before I started testing, the Path Status indicated Partial/No Redundancy.

Thanks much in advance for helping a noob...

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binoche
VMware Employee
VMware Employee

please check such as IBM DS best practice docs to set up your iSCSI SAN

binoche, VMware VCP, Cisco CCNA

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mike7645
Contributor
Contributor

Thanks for the reply... yeah I have the docs that IBM provides and have been going through them this week. Still I am not sure how to get the paths to show up. I suppose I can remove the iSCSI target from the storage adapter and re-add them. Is there a better way?

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binoche
VMware Employee
VMware Employee

here are 2 KBs, and usually your set up should avoid single point of failure

Troubleshooting ESX Server and ESXi connectivity to iSCSI arrays using software initiator (1003952)

Troubleshooting iSCSI array connectivity (1003681)

binoche, VMware VCP, Cisco CCNA

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