VAXStation 4000/90 Hard drive options

[Zane H. Healy]

> Yeah...I just recently got an IBM drive that has absolutely refused to
> work on any narrow SCSI bus I've tried it on.  It works fine on a
> peecee with an LVD SCSI card in it - but it isn't the peecee that I
> want to use it on, but rather a SS20.  *growl*
> 
> I used to think that "SCSI is SCSI is SCSI".  I think this is the first
> case I've met where a SCSI device doesn't Just Work....

I just dug up the specific message where David Turner mentions this on
comp.os.vms:

> You can do this with OLDER UW and U2 Disks U3 Drives do not like being
> bumped down to 8Bit

> On many wide drives, you need to diable FW negotiation (most IBM drives 
> have this) Compaq used IBM drives in their faster storageworks narrow 
> canisters with the FW NEgotiation disabled by default

Since I've planned on eventually having to use newer SCSI drives on my
PDP-11's and even my VAXen, this was rather disturbing news.  

		Zane