so…is it compatible? Sorry, that was a bit confusing for me. 

-Jake

On Dec 24, 2011, at 12:47 AM, Gregg Eshelman wrote:

> --- On Fri, 12/23/11, Jake <[email protected]> wrote:
> 
>> I have been puzzling over my Castlewood Orb drive, and I
>> have a
>> question:
>> IF I have the right adapters (HD50M —> HD68F, HD68M
>> —> 50F), can I
>> even use the drive with Mac OS 7.6.1? OR, do I need a more
>> advanced
>> operating system to use the drive (e.g. Mac OS X)? I think
>> the drive is SCSI-3, but I may be wrong.
> 
> If the connector on the Orb drive is high density 50 pin, it can't be 
> anything higher than Fast SCSI 2.
> 
> What you need is an HD50 to DB25 SCSI cable to connect to a Mac, or a NuBus 
> SCSI controller. The two best known are ATTO and FWB Jackhammer.
> 
> Both companies made a range of SCSI controllers so you need to know which one 
> you're getting. For ye olde SCSI drives you *do not* want a differential SCSI 
> controller, unless it also has support for SE (single ended).
> 
> There are two types of differential SCSI Low Voltage Differential (LVD) and 
> Differential SCSI, which got "backromymed" as HVD for High Voltage 
> Differential when LVD came along.
> 
> HVD was short lived because LVD included support for operating in SE mode 
> thus most LVD devices have settings to enable adapting to 50 or 68 pin SE 
> SCSI controllers.
> 
> FWB made at least one HVD NuBus controller, but you'd only want one if you 
> can lay hands on some dirt cheap HVD hard drives.
> 
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