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- From: szymon@uci.agh.edu.pl (Szymon Sokol)
- Subject: Re: what is prestoserve??
- Message-ID: <szymon.76.721074350@uci.agh.edu.pl>
- Sender: news@cyf-kr.edu.pl
- Nntp-Posting-Host: uci6.uci.agh.edu.pl
- Organization: University Of Mining and Metallurgy
- References: <1992Nov3.042210.22311@afterlife.ncsc.mil> <1992Nov4.212349.19891@sj.ate.slb.com>
- Date: Fri, 6 Nov 1992 18:25:50 GMT
- Lines: 32
-
- >Steven Fenger (svfenge@afterlife.ncsc.mil) wrote:
- >: >>> 4/690m (data server for ~130 workstations and 300 users)
- >: >>> 12 1.2Gb IPI drives
- >: >>> 3 IPI Panther disk controllers
- >: >[...]
- >: >There is (at least =) a minor problem with the PrestoServe accelerators,
- >: >you can only accelerate those disk drives that are on the same bus as the
- >: >PrestoServe accelerator, i.e. you need the VME board. We tried to accelerate
- >: >additional SCSI disks on a 4/670 which lead to server crashes when mounting
- >: >the devices. I didn't find a single note in the release notes about this.
- >:
- >: Not entirely true. We have a SBus PrestoServe running with our IPI
- >: disks in a 690. However, you should get a VME PrestoServe anyway,
- >: since the PS can then do DMA transfers to your IPI controllers.
-
- Well, we just ordered a 690MP with IPI disks and sBus Prestoserve...
- Do you think it was an error, i.e. we should rather buy VME Prestoserve?
- How big is the difference in performance?
- Also, can anyone compare performances of IPI-based and SCSI-2-based disks?
- TIA,
-
- Szymon Sokol
- Network Manager
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