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From: "Mike O'Connor" 
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@Date: Fri, 18 Jul 2003 01:29:42 +1000
Subject: Re: SCSI - SCA 80 To 68 Converter
Reply-To: os2hardware{at}yahoogroups.com
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Ralph Cohen wrote:

>On Fri, 18 Jul 2003 00:08:36 +1000, Mike O'Connor wrote:
>  
>
>>I've just installed eCs 1.1 onto a Seagate Cheetah LVD/SE-80-pin drive 
>>[SCA] - the adapter I have [Z-profile] has both a 68-pin and a 50-pin 
>>connector on the cable-side.  The instructions said to set the SCSI-ID 
>>on the adapter itself.  Worked for me - drive was set as ID-0 - no 
>>jumpers. That's hooked up to an Adaptec AHA-2940UW [68-pin]. RMT-start 
>>is the jumper to disable drive spin-up until controller activates it, so 
>>that there is no massive power drain when up to 14 SCSI drives all 
>>spin-up simultaneously at boot-time, IIRC.
>>
>Hi Mike,
>
>I believe that both the adapter and drive must have different SCSI IDs
>set.  If the adapter defaults to something other than 0 and the drive
>is set to 0 then that setup would work, but if you have more than one
>drive they cannot both be set to 0 so at least one of them must be
>jumpered to a different address.
>  
>

Hi Ralph,
You leave the  actual drive id0/1/2/3 all unjumpered and use the 
id0/1/2/3 on the [add-on] adapter to set the drive's SCSI-ID.
The only problem arises when using the 50-pin connector on the add-on 
adapter to an 8-bit HBA connector with effectively only SCSI-IDs 0 to 6 
available, assuming HBA is normal SCSI-ID=7 whereas  the first connected 
adapter has 15 of 16 selectable, so don't use pin id3. If three separate 
drives are all set as SCSI-ID=0, and the individual adapters on each 
drive are set to SCSI-ID-0/1/2 respectively, whether connected by 50 or 
68-pin cable to the HBA, it sees them as ID=0,1,2 on that particular 
SCSI-bus.

I am only a neophyte in SCSI of course, this is the first wide-SCSI/LVD 
experience I have had - past two days, and only had 8-bit SE for the 
past few months, for thefirst time.  After transferring a 250MB 
directory in 3 seconds from the ATA-100 [JFS] drive to the LVD-SCSI I 
like it. :-)

-- 
Regards,
Mike

Failed the exam for
--------------------
MCSE - Minesweeper Consultant and Solitaire Expert
--------------------



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