Storage vMotion with Syncrep on Equallogic San

Hello

We recently bought 2 San Equallogic (PS6510ES) and turned on synchronous replication between them.

We use ESXi 5.5 and followed the best practices guide to disable TCP ack and 60 logintimeout value.

Everything seems to work fine until we tried Storage vMotion/migration and cloning VMS on the San.

When we did the migration of 2 volumes on the EQL SAN storage (the target volume has active syncrep), the target volume will be out-of-sync and then the storage vMotion will hang sometimes.

The worst is when such a problem has occurred, all other volumes on the EQL constantly to respond also. All volumes will not respond until we rebooted the corresponding ESXi host (NOTE: simple shut down/power outside the host won't help.) The San EQL will only return to normal after a reboot of the ESXi host).

If we pause / off the syncrep before Storage vMotion, the problem will not happen.

Is this normal or not?

In addition, whenever the problem occurred, the latency of writing the corresponding volume will be dry and we will receive alerts similar to the following:

connection iSCSI target ' xx.xx.xx.xx:3260, iqn.2001 - 05.com.equallogic:xxxxx - test-volume ' initiator 'xx.xx.xx.xx:xxxxx, eqlinitiatorsyncrep' failed for the following reason:

Initiator, disconnected from the target when connecting.

Thanks in advance.

Hi Joerg,

What is a #SR? I opened a record of support to 24 June and still waiting for Dell to contact me.

Ryan

Tags: Dell Products

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