[Info-vax] unused SAS SFF disk spin status?

[Stafford Winters]

I recall an unsupported utility for VAX/VMS called RZDISK, which I think 
supported commands to spin up and spin down.  It may have also been 
available for Alpha.

On 8/19/2011 2:02 PM, Steven Schweda wrote:
> On Aug 19, 2:12 pm, "Richard B. Gilbert"<rgilber... at comcast.net>
> wrote:
>
>> I believe that you can simply dismount the drive and it will spin down.
>     I know nothing, but I wouldn't bet on it.  I suspect that you could
> fiddle with the drive's firmware, or with a jumper on the drive, and
> get
> the drive not to spin up by default at power-on.  Once it's spinning,
> I'd guess that someone would need to send it a command to get it to
> spin
> down, and I doubt that even DISMOUNT /UNLOAD would do that for a hard
> disk drive.
>
>     I can't remember seeing a ready-to-use program which would send the
> appropriate (SCSI) command(s) to a device on a VMS system, but there's
> some code in mtools which is intended to do things like eject a
> cartridge from a Zip drive, and I'd bet that that could (with no great
> effort) be adapted to do Stop/Start Motor instead of Eject/Load
> Medium.
>
>        http://en.wikipedia.org/wiki/SCSI_Start_Stop_Unit_Command
>        http://antinode.info/dec/sw/mtools.html
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