🚀 go-pugleaf

In article <1d13eqINNin1@uwm.edu> peter@miller.cs.uwm.edu (Peter J Diaz de Leon) writes:
>
>I have a Micropolis 1588 SCSI drive connected to a DPT EISA SCSI
>controller.  My question is could I move the drive from a DPT
>controller to an Adaptec 1740 EISA SCSI controller without
>reformatting the drive?
>
>I am running ISC Sys V Unix Version 3.01
>
>Thanks
>Peter
>(peter@miller.cs.umw.edu)

No. DPT uses a unique translation scheme. You would have to reformat.
You can only move drives transparently if the controllers are
compatible at that level. 

For instance, you could move from an Adaptec 174(x) to a BusLogic 74(x),
which I would recommend anyway since the BusLogic doesn't have the 
SCSI tape firmware problem that the Adaptec has.
-- 
Ed Whittemore   uunet!maxed!ed   ed@maxed.amg.com
American Micro Group, Inc.   201-944-3293

In <Bx3DA3.DDv@maxed.amg.com> ed@maxed.amg.com (Ed Whittemore) writes:

>In article <1d13eqINNin1@uwm.edu> peter@miller.cs.uwm.edu (Peter J Diaz de Leon) writes:
>>
>>I have a Micropolis 1588 SCSI drive connected to a DPT EISA SCSI
>>controller.  My question is could I move the drive from a DPT
>>controller to an Adaptec 1740 EISA SCSI controller without
>>reformatting the drive?
>>
>>I am running ISC Sys V Unix Version 3.01
>>
>>Thanks
>>Peter
>>(peter@miller.cs.umw.edu)

>No. DPT uses a unique translation scheme. You would have to reformat.
>You can only move drives transparently if the controllers are
>compatible at that level. 

>For instance, you could move from an Adaptec 174(x) to a BusLogic 74(x),
>which I would recommend anyway since the BusLogic doesn't have the 
>SCSI tape firmware problem that the Adaptec has.

What problem is this?  I ask because I have an AHA-1740A and am
planning on buying a high-capacity SCSI tape drive.

-- 
"Insisting on perfect safety is for people who don't have the balls to live
 in the real world."   -- Mary Shafer, NASA Ames Dryden
------------------------------------------------------------------------------
Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.

mccall@mksol.dseg.ti.com (fred j mccall 575-3539) writes:

>In <Bx3DA3.DDv@maxed.amg.com> ed@maxed.amg.com (Ed Whittemore) writes:
>>For instance, you could move from an Adaptec 174(x) to a BusLogic 74(x),
>>which I would recommend anyway since the BusLogic doesn't have the 
>>SCSI tape firmware problem that the Adaptec has.

>What problem is this?  I ask because I have an AHA-1740A and am
>planning on buying a high-capacity SCSI tape drive.

the 1740 seems to want to treat the tape to sync protocol. in so doing,
looses the state of the check condition on end of media. for our
unix systems this results in being able to write a tape, but hang
on trying to read it back.

(Marketing Blurb) Microports enhanced mode driver for the 1740 has
a patch to work around this firmware problem. email direct for details,
as the engineer that wrote it, i'll be happy to provide info to interested
folks; unfortuneately this only helps microport svr4 users. sorry.

jack...
=============================================================================
 Jack Craig  Microport         SVR4 408-438-UNIX   uunet!mport.com!jack
             Software Horizons SVR3 408-684-1375   uunet!sco.com!blznrzn!jack
=============================================================================
>-- 
>"Insisting on perfect safety is for people who don't have the balls to live
> in the real world."   -- Mary Shafer, NASA Ames Dryden
>------------------------------------------------------------------------------
>Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.