Re: SCSI disks for GS?

[gregt@visix.com (Greg Thompson)]

>"de" == David Empson <dempson@atlantis.actrix.gen.nz> writes:

  de> In article <tolsenD45zAD.DF3@netcom.com>,
  de> Tall Runner <tolsen@netcom.com> wrote:
> I wrote:
> 
> : I just bought a Seagate ST1950N SCSI-II/FAST drive and it works well with 
> : my Ramfast Rev d.  However, I'm having a lot of trouble getting it to 
> : work with another SCSI-I drive on the same bus.  I'm working on it tho.  
> : I believe it's a termination problem and I'm close to finding a solution.
> 
> It's been suggested to me that the drive is just TOO FAST for the GS. The 
> drive itself has a 256k read ahead buffer.  It's interface is SCSI-II/FAST.

  de> I haven't looked into "Fast SCSI" in detail, but this refers to
  de> the data transfer speed between the computer and the drive.  If
  de> the computer's SCSI controller cannot keep up, then data will be
  de> lost.

  no.  if the computer's scsi controller doesn't support fast mode, it
won't be used.

  de> I thought that Fast SCSI was an optional feature.  Maybe I
  de> should have a closer look at that section of the draft SCSI-2
  de> standard.

  if the drive has a proper implementation of SCSI-II, it won't do any
of the funky fast stuff unless it has negotiated it with the other
device on the chain.  a non-wide scsi-ii devide should work just fine
on a chain with scsi-i devices.

		-greg