[MtFuji] SATA cabcon proposal for Zero Power ODD effort

[keiji_katata at post.pioneer.co.jp]

* From the T10 Reflector (t10 at t10.org), posted by:
* keiji_katata at post.pioneer.co.jp
*
Hi Brian, this is an additional two comments.
Comment #2 for legacy drive:
---- page 5 ----
Device implementation of this feature is optional and if supported, the
device
shall set the appropriate bit in the IDENTIFY PACKET DEVICE data structure to
inform the host it supports this capability.  (See section 13.2 for details).
If the device doesn$B!G(Bt implement the feature the device shall present a
resistance greater than 100 Kilohm (+/- 10%).
----------------
I think this is an optional feature, therefore the 2nd paragraph of above may
be
removed.
Pioneer's some legacy drive used MD pin as TTL level RS-232C output. So a
host
system that can support this feature should turn this feature off with legacy
drive.
Comment #3 for host setting at power-on state of drive:
For this purpose, the Device Attention signal should be detected by host at
power-off state of drive. If host has mask capability of DA pin of host, host
may stop the DA pin function of host at power-on state of drive.
Best regards,
Keiji Katata
PIONEER CORP.
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