[DM-MUG] SCSI & SyQuest

[Jim lagnese]

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ID 7 is reserved for the computer for Macs that use built-in SCSI, and 
SCSI cards that are narrow SCSI. From my perspective, especially with 
OS X 10.0-10.1, SCSI was far from error free or forgiving. It works 
fine in 10.2.x and above, at least for me. Termination is used on the 
last device in the chain, not the first, unless you consider the SCSI 
card/Computer a device and that would be built in and not a concern. If 
you terminated the first device, you would not see the devices that 
came after it. You could try ID's from 0-6, depending on the 
configuration. Apple used ID 3 on internal SCSI optical drives and boot 
drives were normally set to ID 0. This was with computers that utilized 
SCSI on the mother board. So without knowing the configuration of your 
setup, and the type of SCSI card, the advice may vary.
jim


On Jan 21, 2005, at 6:47 PM, Martin Hood wrote:

> John
>
> OS X is more forgiving for SCSI problems than OS9. Normally the first 
> and
> last devices in a SCSI chain are terminated. Most SCSI controllers 
> have the
> first terminator built into the card. I remember having SCSI problems 
> around
> my Syquest drive. Try changing the address of the Syquest drive from 
> one to
> seven or vice versa. If my memory serves me right Syquest needed to be 
> the
> first device in the chain or the last.
>
> Gary
>
> On 1/21/05 12:59 PM, "John Kisner" <kisnerj@dwx.com> wrote:
>
>> I added a SCSI card to a G4 so I could use an old SyQuest EZ drive and
>> an external SCSI hard drive.  It was tough to find drivers after all
>> these years, but I eventually got the SyQuest to work under OS9 (but
>> not the hard drive), and the hard drive to work under OSX (but not the
>> Syquest).
>>
>> Only remaining problem is one of my SyQuest cartridges is always
>> rejected (the others work fine).  I assume the cartridge has not aged
>> well, and data is lost.  Data isn't all that important anyway, but are
>> there ideas for how to rescue from the Syquest?
>>
>> I was also wondering about whether I need to "terminate" the SCSI card
>> when no devices are plugged in.  My start-up seems slower, and was
>> wondering if this might be the cause.  I've run TechTools 4, and
>> everything seems ok.
>>
>> John
>>
>> PS- Will the iWork software be in Des Moines on Saturday?  Minis and
>> Shuffles?
>>
>> _______________________________________________
>> Dmmug mailing list
>> Dmmug@dmmug.org
>> http://cialug.org/mailman/listinfo/dmmug
>
>
> _______________________________________________
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ID 7 is reserved for the computer for Macs that use built-in SCSI, and
SCSI cards that are narrow SCSI. From my perspective, especially with
OS X 10.0-10.1, SCSI was far from error free or forgiving. It works
fine in 10.2.x and above, at least for me. Termination is used on the
last device in the chain, not the first, unless you consider the SCSI
card/Computer a device and that would be built in and not a concern.
If you terminated the first device, you would not see the devices that
came after it. You could try ID's from 0-6, depending on the
configuration. Apple used ID 3 on <bold>internal SCSI</bold> optical
drives and boot drives were normally set to ID 0. This was with
computers that utilized SCSI on the mother board. So without knowing
the configuration of your setup, and the type of SCSI card, the advice
may vary. 

jim



On Jan 21, 2005, at 6:47 PM, Martin Hood wrote:


<excerpt>John


OS X is more forgiving for SCSI problems than OS9. Normally the first
and

last devices in a SCSI chain are terminated. Most SCSI controllers
have the

first terminator built into the card. I remember having SCSI problems
around

my Syquest drive. Try changing the address of the Syquest drive from
one to

seven or vice versa. If my memory serves me right Syquest needed to be
the

first device in the chain or the last.


Gary


On 1/21/05 12:59 PM, "John Kisner" <<kisnerj@dwx.com> wrote:


<excerpt>I added a SCSI card to a G4 so I could use an old SyQuest EZ
drive and

an external SCSI hard drive.  It was tough to find drivers after all

these years, but I eventually got the SyQuest to work under OS9 (but

not the hard drive), and the hard drive to work under OSX (but not the

Syquest).


Only remaining problem is one of my SyQuest cartridges is always

rejected (the others work fine).  I assume the cartridge has not aged

well, and data is lost.  Data isn't all that important anyway, but are

there ideas for how to rescue from the Syquest?


I was also wondering about whether I need to "terminate" the SCSI card

when no devices are plugged in.  My start-up seems slower, and was

wondering if this might be the cause.  I've run TechTools 4, and

everything seems ok.


John


PS- Will the iWork software be in Des Moines on Saturday?  Minis and

Shuffles?


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Dmmug@dmmug.org

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</excerpt>


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