Transport speed capabilities
Kevin D Butt
kdbutt at us.ibm.com
Thu Aug 6 11:09:30 PDT 2009
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I continue to have customers query me on the ability to report the speeds
that the hardware of our devices support over the transport.
In SAS there is mode page 19h subpage 01h that provides
PROGRAMMED MINIMUM PHYSICAL LINK RATE
HARDWARE MINIMUM PHYSICAL LINK RATE
PROGRAMMED MAXIMUM PHYSICAL LINK RATE
HARDWARE MAXIMUM PHYSICAL LINK RATE
For Fibre Channel I can find nothing comparable
In ADC-3, there is the primary port log page that reports the current
operating information for the transport (covers pSCSI, SAS, FC) and SSC-3
points to this page for use also. This does not, however, provide the
capabilities of the port.
Is there some existing method to provide in the SCSI layer the ports
capabilities for the FC transport?
Should there be an effort to create on if one does not already exist?
Maybe in the Protocol specific port information VPD page?
Kevin D. Butt
SCSI & Fibre Channel Architect, Tape Firmware
MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
Fax: 520-799-2723 (T/L:321)
Email address: kdbutt at us.ibm.com
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