SCSI2SD

SCSI2SD model	V5.1 (discontinued)	V5.2	V5.5	V6
SD card slot	full size		microSD	full size
SD card interface	Full-size, 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)