linux-kernel - Re: Hack to fix not working spindown over Firewire

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Date:	Sun, 11 May 2008 00:53:05 +0200 (CEST)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	linux1394-devel@...ts.sourceforge.net
cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	Tino Keitel <tino.keitel@....de>
Subject: Re: Hack to fix not working spindown over Firewire

I wrote:
> 1) FireWire to IDE or to SATA chipset
> 2) start bit is honored:
>    "sg_start --stop" stops the motor and "sg_start" restarts it
> 3) power condition field is honored:
>    "sg_start --pc=3" stops the motor and "sg_start --pc=1 restarts it
> 4) peripheral device type claimed by the firmware
> 5) vendor and model of the enclosure
> 
> 
> 1)           2)     3)     4)    5)
> bridge       start  pc     PDT   enclosure
> --------------------------------------------------------------
...
> TSB42AA9     no     yes    SBC   DViCO MomoBay CX-1
> TSB42AA9A    yes    yes    RBC   DViCO MomoBay FX-3A

Correction:  While the FX-3A stops the motor if START STOP UNIT with an
equivalent to "sg_start --stop", it does not work correctly anymore
after it.  Certain commands after that will hang the firmware up;
notably those sent when sd_mod is probing the disk.  I.e. FX-3A fails
not exactly as CX-1, but similarly.
-- 
Stefan Richter
-=====-==--- -=-= -=-==
http://arcgraph.de/sr/

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