[SunRescue] Max harddisk size for Sun Sparc 20

Chad Fernandez rescue at sunhelp.org
Tue Jun 5 07:58:57 CDT 2001

I don't know if you are in fact confusing terms or not.  However it
sounds like you are confusing Low Voltage Differential, commonly called,
"LVD", with High Voltage Differential, commonly called, "Differential". 
LVD drives are normally compatible with Single ended by shorting a
jumper, they'll be slower, However.  High Voltage Differential drives
aren't compatible with anything else.  Adapters can be had, but you
would need a lot of room to mount one inside a case.

I mention all this because LVD is the Differential that was mentioned. 
Speaking of which, I need to install my new LVD cable so I can bump my
drive up to LVD (U2 performance) instead of SE.

Chad Fernandez
Michigan, USA

Les wrote:
> To the best of my limited knowledge, you must have a differential
> SCSI host adapter to use differential SCSI.  Of the dozen or so
> SS20 boxen I've worked with none had internal differential SCSI.
> You can add an sbus differential SCSI card and use the drive externally.
> Someone else on the list will know more.
> I have a 9GB internal drive running in one of my SS20s now, will look
> at make & model number when I get home.
> Les

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