[Info-vax] DEC AXP 3000 model 300X question

[Richard B. Gilbert]

H Vlems wrote:
H Vlems wrote:
> The system has an on-board SCSI controller and a Turbochannel SCSI
> controller with two SCSI interfaces.
> The SRM prompt only shows disks attached to the on-board controller.
> The devices are listed as DKAnnn.
> Once VMS runs, these disks are named DKC, while the Turbochannel
> attached devices are visible and use PKA0 and PKB0.
> 1) is this normal behaviour (this being my first Turbochannel system)?
> 2) I there a way to boot from a Turbochannel attached SCSI disk?
> 3) Is there a performance difference between the on-board and
> turbochannel SCSI bus?
> The 3000 model 300's have a at handicapped Turbochannel bus, hence the
> last question.
> Hans

> The system has an on-board SCSI controller and a Turbochannel SCSI
> controller with two SCSI interfaces.
> The SRM prompt only shows disks attached to the on-board controller.
> The devices are listed as DKAnnn.
> Once VMS runs, these disks are named DKC, while the Turbochannel
> attached devices are visible and use PKA0 and PKB0.
> 1) is this normal behaviour (this being my first Turbochannel system)?
> 2) I there a way to boot from a Turbochannel attached SCSI disk?
> 3) Is there a performance difference between the on-board and
> turbochannel SCSI bus?
> The 3000 model 300's have a at handicapped Turbochannel bus, hence the
> last question.
> Hans

Yes, it's normal.  The console firmware and VMS use different algorithms 
to discover the hardware configuration.  The firmware is pretty limited.
When VMS is booted, it does a more thorough investigation!