Partial Medium Load for MAM Access
Paul_A_Suhler at notes.seagate.com
Paul_A_Suhler at notes.seagate.com
Thu Oct 21 09:30:13 PDT 1999
* From the T10 Reflector (t10 at t10.org), posted by:
* Paul_A_Suhler at notes.seagate.com
*
Gene raises a good point. Two things to consider:
A new command in SPC-2/3 would use up an opcode, but those don't seem to be
in short supply. Or are they?
Such a command wouldn't help out SMC, unless it were fairly complex.
Off-line, Lee Jesionowski, of IBM, made a number of suggestions:
This might only be needed for tape devices, since the spin up/down times for
other media are relatively short.
An alternative to modifying CDBs would be to use Mode Select to put the
device in a mode not to thread and then use the existing Load/Unload. After
reading MAMs, do another Mode Select to restore normal functioning.
A sense key of Not Ready would be more appropriate for the proposed ASC/ASCQs
than Unit Attention, since the primary medium is, in fact, not ready.
Comments, please.
Thanks,
Paul
* From the T10 Reflector (t10 at t10.org), posted by:
* Gene_Milligan at notes.seagate.com
*
If it is needed in so many commands sets, why not make it just in SPC-2 or
SPC-3?
Gene
*
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