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February 21st, 2011 07:00
AIX MPIO Failed Gatekeeper Path
On a newly installed AIX 6.1 system, one of two (2) gatekeeper paths fails. If it is enabled with the AIX MPIO chpath command, it goes Enabled, but a few minutes later shows Failed and AIX has recorded several Error Log entries.
>lspath -l hdisk4
Enabled hdisk4 fscsi0
Failed hdisk4 fscsi2
vxttkpd8 root / >errpt
IDENTIFIER TIMESTAMP T C RESOURCE_NAME DESCRIPTION
A6F5AE7C 0221094611 I H hdisk4 PATH HAS RECOVERED
02A8BC99 0221094611 P H hdisk4 PATH HAS FAILED
A6F5AE7C 0221082511 I H hdisk4 PATH HAS RECOVERED
02A8BC99 0221082511 P H hdisk4 PATH HAS FAILED
A6F5AE7C 0221073311 I H hdisk4 PATH HAS RECOVERED
02A8BC99 0221073311 P H hdisk4 PATH HAS FAILED
02A8BC99 0221073311 P H hdisk4 PATH HAS FAILED
A6F5AE7C 0221072711 I H hdisk4 PATH HAS RECOVERED
02A8BC99 0221072711 P H hdisk4 PATH HAS FAILED
02A8BC99 0221072711 P H hdisk4 PATH HAS FAILED
A6F5AE7C 0221072511 I H hdisk4 PATH HAS RECOVERED
02A8BC99 0221072511 P H hdisk4 PATH HAS FAILED
A6F5AE7C 0221072511 I H hdisk4 PATH HAS RECOVERED
02A8BC99 0221072511 P H hdisk4 PATH HAS FAILED
02A8BC99 0217135511 P H hdisk4 PATH HAS FAILED
gc_emc
45 Posts
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April 22nd, 2011 07:00
Hi ,
As per the emc primus solution: emc255976
14. Can I use PowerPath with Gatekeepers and is there a reason to do so?
Yes, and there is good reason to do so. Many Open Systems customers double the Gatekeeper count, with half on each of two paths. With this configuration, in the event of path failure, the Symmetrix could still receive commands. PowerPath protects against path failure without the need to double the device count.
15. Can I use other multi-pathing products with Gatekeepers?
No. Other multi-pathing products may not be used to define multiple paths with Gatekeepers. PowerPath uniquely recognizes Symmetrix commands and treats them in a special manner when multiple paths are available to the Gatekeeper device. Products without this awareness can, for example, retry the I/O and cause significant issues with the command processing.
For more information about using MPIO in an AIX environment , refer to "EMC Host Connectivity Guide for IBM AIX" (page 263)
You can find this document on powerlink.emc.com
Rdgs, Gearóid