Re: [dm-devel] IBM DS4300

[Holger Smolinski <smolinski de ibm com>]

Gil,

DS4300 has two modes:

AVT, which means only one path can be used at any point in time. Using an
alternate path will cause Automated Volume Transfer and add significant
latency.
RDAC, which means only one path can be used at any point in time. Using an
alternate path will cause an I/O error unless the volume has been migrated
manually or by a hardware_handler.

Best Regards
        Holger Smolinski
--
Dr. Holger Smolinski, Linux Technology Center, Linux on zSeries
Author of the '-t2'-Option
IBM Deutschland Entwicklung GmbH,Schönaicher Str. 220, 71032 Böblingen
FAX: +49-7031-16-3456, Tel. +49-7031-16-4652


                                                                           
             "Gil"                                                         
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Hi list,

I have the following SAN hardware, and would be very grateful for any help:

SAN:
IBM DS4300 Storage Server with Turbo Option

HBA:
Fast Host Bus Adapter FC-2

Switch:
2 IBM TotalStorage SAN Switch H08 (8-portas)

Does multipath-tools support this hardware? How should I configure it?

I have tried to use multipath with it, using default configuration, but I
am having performance problems. What I would like to figure out is if
multipath-tools has anything to do with it.

Best regards,
    Gil--
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