Any relief for max. ext_bus limit of 255?

[Joseph Farinaccio_1]

We have an rx8620 running 11.23 with 4 FC hbas. The SAN is unzoned (required) with 6 EVA 8000s. Four of the six EVAs are fully connected (8 connections) to the fabric. When we present a single LUN on a fully connected EVA to the rx8620 we immediately violate the max. ext_bus limit of 255 ( we go to 264). My understanding is that this is due to the way the HPUX decodes the Vdisk address, causing the creation of virtual busses.

Is there any HPUX patch that will allow unlimited ext_bus values, or is it necessary to reconfigure the environment?
Thanks

[Steven E. Protter]

Shalom Joseph,

Apparently changing these limits with regards to fiber channel connections is difficult. At my prior position we waited for years for a patch that was supposed to lift the 8 LUN per Card limit.

We never got the patch btw.

I would say based on that experience its necessary to reconfigure the environment to work within the limits.

I also recall a 255 disk limit to a single volume group, so there are likely LVM considerstions that would make you want to reconfigure.

SEP