[rescue] SCSI2 to IDE (was: Re: SCSI 50 to 68 to 80 pin thingies)

[Michael Parson]

On Tue, 22 Feb 2011, William Enestvedt wrote:

> Alex wrote:
>
>> ...look for a
>> 750mb or larger 12mm 2.5" parallel SCSI HDD.  Every one that I have
>> ever seen is actually a 9.5mm IDE disk, with the ADTX (or similar)
>> bridge attached, including the ones that Apple sold for their
>> PowerBooks.
>>
>
>   Wait, I have a 750MB HD from Apple here that was in an old PowerBook
> wich is 12.5mm and 2.5", but it's ATA not SCSI. Am I mis-reading what
> you wrote?

There were some (one?) PowerBooks (I want to say that it might have been
the PB Duo 2300c?) that could take either SCSI or IDE drives.  I
wasn't much into Apple laptops when this was going on, but I've seen the
insides of a Powerbook that belonged to a friend of mine that was set up
this way.  If these shipped from the factory with a larger SCSI drive,
they were IDE disks with bridges.

IBM made a 1.1 gig 2.5" SCSI drive, which is what my Sparcbook 3GX had
in it when I got it.  This was a real SCSI drive, no bridge involved.
>From what I've heard over the years, the Powerbooks that had SCSI drives
larger than that had the ACARD bridges in them, which have the 8 gig
limit and run at SCSI speeds rather than SCSI-2.

The chb25int unit, which is what I have in my Sparcbook, runs at SCSI-2
speeds and does not have the 8 gig limit.  I've currently got it
attached to an 80 gig drive, with no problems.

These days, they seem to be as close to unavailable as to not matter.

-- 
Michael Parson
mparson at bl.org