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  • Latency vs speed Re: SCSI Blue, an open source project

    From Louis Ohland@21:1/5 to Louis Ohland on Sun Apr 24 20:15:02 2022
    Wonder what the "feel" of a Spock with a mechanical HDD compared to a
    AzulSCSI / BlueSCSI SD combo. At the start of the transfer, the BlueSCSI
    should beat the pants off an actual HD. However, in time the thundering
    herd will overwhelm the BlueSCSI. BUT... how often is the HD actually
    used to pass lots of data...

    On 4/24/2022 20:09, Louis Ohland wrote:
    There are older PS/2s with 5MB/s on the system board. Something in that
    range would be sufficient.

    Unfortunately, IBM never made any narrow/fast SCSI adapters [other than
    4-4 for RS/6000]. Love to see the throughput of a 5MB/s on a Patriot.

    On 4/24/2022 16:05, Shane Benting wrote:
    BlueSCSI is about 1MB/s throughput currently, but super low latency.
    It's great for older systems. I've been meaning to try it out on some
    of my PS/2s.

    -Shane

    On Thursday, April 21, 2022 at 9:16:24 AM UTC-7, Louis Ohland wrote:
    Confusing [lots of memories of a land shark with tiny teeth]

    Performance numbers?

    On 4/20/2022 21:55, moussa wrote:
    https://scsi.blue/


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Louis Ohland@21:1/5 to Louis Ohland on Sun Apr 24 20:19:17 2022
    Adding a buffer to the BlueSCSI of a size to offset the lower speed
    MIGHT be gainful. Perhaps comparing the disk to adapter sustained
    transfer rates would be a good target to shoot for?

    Later versions could improve the transfer.

    On 4/24/2022 20:15, Louis Ohland wrote:
    Wonder what the "feel" of a Spock with a mechanical HDD compared to a AzulSCSI / BlueSCSI SD combo. At the start of the transfer, the BlueSCSI should beat the pants off an actual HD. However, in time the thundering
    herd will overwhelm the BlueSCSI. BUT... how often is the HD actually
    used to pass lots of data...

    On 4/24/2022 20:09, Louis Ohland wrote:
    There are older PS/2s with 5MB/s on the system board. Something in
    that range would be sufficient.

    Unfortunately, IBM never made any narrow/fast SCSI adapters [other
    than 4-4 for RS/6000]. Love to see the throughput of a 5MB/s on a
    Patriot.

    On 4/24/2022 16:05, Shane Benting wrote:
    BlueSCSI is about 1MB/s throughput currently, but super low latency.
    It's great for older systems. I've been meaning to try it out on some
    of my PS/2s.

    -Shane

    On Thursday, April 21, 2022 at 9:16:24 AM UTC-7, Louis Ohland wrote:
    Confusing [lots of memories of a land shark with tiny teeth]

    Performance numbers?

    On 4/20/2022 21:55, moussa wrote:
    https://scsi.blue/



    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)