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androda edited this page Mar 10, 2023 · 17 revisions

BlueSCSI supports Fast SCSI up to 10MB/sec synchronous.

When tuning for performance there are a few factors to keep in mind:

  • The rating, brand, and wear of your SD card can significantly impact performance.
  • The SCSI drivers (especially on a Mac) can make a huge difference. FWB has the best performance on Power Macs, but is not universal so is not included on pre made images.
  • If an image file is fragmented on the SD card performance will be much slower. You will see a warning in the log file.

Results

If you are adding your own result to this page you MUST include the SD Card brand/rating and testing tool. Ones that don't will be removed.

Machine Drivers SD Tool Read Write Notes
PowerMac 9600 FWB SanDisk Extreme 32GB A1 FWB Bench 8.6 MB/s 7.3 MB/s On internal Fast Bus
Beige G3 FWB WD Purple 32GB UHS-1 SCSI Dir 4 3.3 MB/s 2.9 MB/s Internal Narrow Bus
Beige G3 v8.1.4 Sandisk Extreme Pro 64 GB UHS-3 SCSI Dir 4 9.5 MB/s 6.1 MB/s Adaptec AVA-2906 PCI
Performa 575 7.3.5 Samsung Pro Endurance 256GB U3 SCSI Dir 4 5.1 MB/s 3.6MB/s 5MB Bus, DB25
Quadra 700 7.3.5 SanDisk Extreme 32GB A1 SCSI Dir 4 4.3 MB/s 4 MB/s 5MB Bus, DB25
PowerBook 180 Mac OS 8 (driver only, not OS) WD Purple 32GB UHS-1 SCSI Dir 4 1.9 MB/s 1.5 MB/s Internal Narrow Bus
PowerBook 180 Mac OS 7.5.3 WD Purple 32GB UHS-1 SCSI Dir 4 0.7 MB/s 0.8 MB/s Internal Narrow Bus
PowerBook 170 Mac OS 7.5.3 Gigastone Gaming plus 32GB A1 FWB Bench 1.7 MB/s 1.4 MB/s DB25
SGI O2 IRIX WD Purple U1 diskperf 9.52 MB/s 6.89 MB/s External SCSI-2
NeXTstation NeXT PNY Elite-X U3 Drive Performance 2.29 MB/s 1.11 MB/s Internal 50-pin (bus limited to 5MB)

Seek

Note that seek numbers are meaningless in a SD solution - they wait 10ns (10ms on SCSI-1 bus) then return good as there is no actual head to move.