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Revision as of 18:36, 11 September 2022 by Aperez (talk | contribs)
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1 September 2022 - Due to ongoing global semiconductor component shortages, we're unable to produce more SCSI2SD V5 and V6 boards at this time. As a result of these shortages, Rabbit Hole Computing has developed an alternative SCSI emulation product, ZuluSCSI. Check out ZuluSCSI instead. It's SCSI command handling code is inherited from SCSI2SD V6, and it performs significantly better than SCSI2SD V5 in nearly all benchmarks. ZuluSCSI is a great alternative to SCSI2SD, and available for purchase today from Rabbit Hole Computing


The latest SCSI2SD firmware and configuration utilities can be found at http://docs.scsi2sd.com


SCSI2SD model
V5.1 (discontinued)
SCSI2SD V5.2

SCSI2SD V5.5
SCSI2SD V6
SD card slot full size microSD full size
SD card interface Tested up to 256GB. Communication is via the SPI protocol at 25MHz (3MB/s theoretical max)
SCSI Interface SCSI-2 Narrow 8-bit 50-pin IDC
connector,
Optional DB25 female socket
Supports asynchronous transfers only.
SCSI-2 Narrow 8-bit
50 IDC pin connector

Supports asynchronous transfers only.
Male DB-25 socket


Supports asynchronous transfers only.
SCSI-2 Narrow 8-bit 50 IDC pin connector
FAST10 (10MB/s) synchronous transfer.
SCSI Termination Software controlled active termination, via scsi2sd-util Active terminator, always on
Dimensions 10cm x 9cm x 1.5cm 7.5cm x 5.5cm x 1.8cm (External case) 10cm x 9cm x 1.5cm
Performance Up to 2.6MB/s read, 2.3MB/s write

(1.1MB/s on most older SCSI hosts)
Up to 1MB/sec Up to 10MB/s
USB Interface Firmware updates and configuration
USB 2.0 micro-B
Firmware updates, configuration, and mass-storage
USB 2.0 micro-B. Mass-storage at USB 2.0 FS speeds (1.2MB/s max)
Power 5V via:
* standard 4-pin floppy-drive connector
* micro USB
* self-powered using the SCSI host termination power

5V via:
* standard 4-pin floppy-drive connector
* micro USB
* self-powered using the SCSI host termination power
* Regulated 5V via optional DC barrel jack.
Self-powered using the SCSI host termination power,
or via USB. 2.35W maximum (500mA)

To function without external power via USB, requires SCSI host that
supplies terminator power on pin 25 of the DB25 socket
5V via standard 4-pin floppy-drive connector, USB,
or self-powered using the SCSI host termination power

Current Draw 2.35W maximum (500mA)