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Solution of VIS reporting IO delay

Publication Date:  2012-09-28 Views:  50 Downloads:  0
Issue Description
VIS6600 V1R2 edition take over original HP EVA6400 array, synchronize HP EVA6400 array data to S5600T array through VIS mirror function. Mirror link is connects to disaster tolerance equipment room 10km away through telecom bare fiber. When delivery comes to the end, there is IO delay alarm in VIS level surveillance.
Alarm Information
Na
Handling Process
1. Change mode of FC port of 4 idle S5600T into Fabric.
2. Plug fiber of S5600T A control P1 port and disconnect with FC switch. Use vxdisk path command in VIS dual control, one link is in disable status and change port mode into Fabric mode. Wait 10 minutes to insert the fiber to switch back. Check the original disable path through vxdisk path command on VIS dual control. The path has resumed to normal.
3. Plug fiber of S5600T B control P0 port and disconnect with FC switch. Use vxdisk path command in VIS dual control, one link is in disable status and change port mode into Fabric mode. Wait 10 minutes to insert the fiber to switch back. Check the original disable path through vxdisk path command on VIS dual control. The path has resumed to normal.
4. Plug fiber of S5600T B control P1 port and disconnect with FC switch. Use vxdisk path command in VIS dual control, one link is in disable status and change port mode into Fabric mode. Wait 10 minutes to insert the fiber to switch back. Check the original disable path through vxdisk path command on VIS dual control. The path has resumed to normal.
5. Plug fiber of S5600T A control P0 port and corresponding SFP. Replace array corresponding to this array and SFP of FC switch, use vxdisk path command in VIS dual control, one link is disable status and change port mode into Fabric mode. Wait 10 minutes, use new fiber as link between array and switch of 2 SFP, and Check the original disable path through vxdisk path command on VIS dual control. The path has resumed back to normal. Make new label on new fiber according original label of old fiber.

Root Cause
1. Collect VIS information for analysis.
2. Collect FC switch SNS2120 information for analysis.
3. Collect array information for analysis.
Through analysis of log, there is bit error from SNS2120 to S5600T in disaster tolerance equipment room. There is a link in problem.

Suggestions
Na

END