REC ELS parameter field
Kevin D Butt
kdbutt at us.ibm.com
Tue Mar 17 07:23:52 PDT 2009
Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r0903170_f.htm">HTML-formatted message</a>
In response to the question sent on the reflector:
FCP-4 folks: FC-LS requires that ?The value of the Parameter field in the
Frame_Header of an REC ELS and an LS_ACC in response to an REC ELS shall
be specified by the FC-4 that sends the frame.? FCP-4 specifies the value
of the Parameter field for the ELS but not for the LS_ACC.
What do people actually do for the LS_ACC? Is it consistent enough to say
something in FCP-4?
The parameter field of LS_ACC is the same as the parameter field of REC
ELS, unless an error occurs internal to the tape drive which requires the
entire command to be redriven. In that case, the parameter field of the
LS_ACC is set to zero to indicate an FCP_RO of zero. The intent is for
the initiator port to discard any previously received data and redrive the
command by sending an SRR with a relative offset of zero.
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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