Welcome, Guest. Please login or register.

Author Topic: Cyberstorm PPC SCSI transfer rates ?  (Read 6351 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline Dandy

  • Hero Member
  • *****
  • Join Date: Apr 2004
  • Posts: 1221
    • Show all replies
    • http://www.wiehltalbahn.de/en/
Re: Cyberstorm PPC SCSI transfer rates ?
« on: August 06, 2014, 10:45:43 AM »
Quote from: Mugo;251466


Hello Guys,

I have an A4000D, with a CPPC (060@50/604e@200), and a 17GB SCSI HD (68 pin) connected to it's onboard interface.

The problem is that i can only have transfer rates of 11MB/s top.



According to the CSPPC speccs its UW-SCSI II host has transfer rates of up to 40 mB/s.

Quote from: Mugo;251466


...
This HD is the only device in the chain. The cable is attached to the CPPB by a connector in the middle of the cable, and there's an active terminator after it (on the end of the cable), then the other end goes to the HD, that have termination enabled.



Your SCSI chain should look like this:

active Terminator ---- CSPPC ---- HD ---- active Terminator

Quote from: Mugo;251466


Everything works fine, but i feel it could be faster.

So i would like to know if any of you guys have a similar configuration, and can achieve higher transfer rates ?

If so, could you tell me your settings in the PPC firmware's menu ?
 . . .



Sorry, but I have a different config.
I also have SCSI-II devices like CD-ROM, CD-RW, DVD-RW and flatbed scanner in the chain - just the HDs run in UW-mode.
Upper 8 Bit of the UW-SCSI properly actively terminated behind the HDs and the lower 8Bit connected to the SCSI-II devices and properly actively terminated behind the last SCSI-II device.
As I am satified with the overall speed I never cared to measure the actual transfer rates.
All the best,

Dandy

Website maintained by me

If someone enjoys marching to military music, then I already despise him. He got his brain accidently - the bone marrow in his back would have been sufficient for him! (Albert Einstein)