SCSI: narrow or wide in A3000 ?

[MrZammler]

Some ultra scsi drives (68pin) have a jumper marked narrow/wide. I know narrow is defined in SCSI-1 (which is what A3000 has).

So, when connecting such a drive on the A3000's internal bus (with a 68->50 pin adaptor) should it be set to narrow or is it ok if it's in wide (faster)?

Thanks

MrZammler wrote:
Some ultra scsi drives (68pin) have a jumper marked narrow/wide. I know narrow is defined in SCSI-1 (which is what A3000 has).

So, when connecting such a drive on the A3000's internal bus (with a 68->50 pin adaptor) should it be set to narrow or is it ok if it's in wide (faster)?

Thanks

The answer to that is kinda obvious. The A3000 internal SCSI bus does not have the extra lines for a wide bus.

So all devices on the bus have to be set as narrow devices.

Normally, there is nothing to set. The devices on the bus will automatically sense they communicate with a narrow controller and will adjust themselves accordingly.

[MrZammler]

Well, yes, it makes sense.

Although, if not set it still works and I feel "faster" than when in narrow mode.

Thing is the disk wont always startup (although it spins) and the amiga wont recognise it, and I'm trying to figure out if that may be causing it.

[amiga_3k]

Does it always start in narrow-mode?

Also, have you tried lowering the startup-priorities of other potential boot-devices (giving the harddisk more time to spin-up and calibrate)?

[MrZammler]

amiga_3k wrote:
Does it always start in narrow-mode?

Not sure, trying this now (it has booted 2-3 times I tested, need more time to be sure).

Also, have you tried lowering the startup-priorities of other potential boot-devices (giving the harddisk more time to spin-up and calibrate)?

No other boot devices, just one partition on a single drive.