1 SCSI2SD, The SCSI Hard Drive Emulator for retro computing.
3 Traditional hard drives last 5 years*. Maybe, if you're luckly, you'll get 10
4 years of service from a particular drive. The lubricants wear out, the spindles
5 rust. SCSI2SD is a modern replacement for failed drives. It allows the use of
6 vintage computer hardware long after their mechanical drives fail. The use of
7 SD memory cards solves the problem of transferring data between the vintage
8 computer and a modern PC (who still has access to a working floppy drive ?)
10 *All statistics are made up.
15 In-built active terminator.
16 Emulates up to 4 SCSI devices
17 Supports sector sizes from 64 bytes to 8192 bytes
18 Firmware updatable over USB
19 Highly configurable over USB
21 Selectable parity support
22 Enable/disable Unit Attention Condition
23 Artificial limits on the SCSI disk size (eg. limit size to 4G to avoid OS bugs)
24 Sector size (can also be set via the SCSI MODE SELECT command, as sent by SCSI format utilities).
27 Technical Specifications
30 SCSI-2 Narrow 8-bit 50-pin connector. Supports asynchronous transfers only.
31 Micro SD Card Interface
32 Standard microSDSC (1GB maximum size)
34 Communication is via the SPI protocol at 25MHz.
35 USB Interface (firmware updates and config)
38 5V via standard molex drive connector
39 USB or self-powered using the SCSI host termination power. (v5 only)
41 10cm x 5cm x 1.5cm (v5)
42 10cm x 10cm x 1.5cm (v3, v4)
47 As currently implemented:
49 Transfer size: 512 2048 8192 65536
50 -------------------------------------------------------
51 read: 2MB/s 2.1MB/s 2.5MB/s 2.6MB/s
52 write: 125kB/s 441kB/s 1.5MB/s 2.3MB/s
53 -------------------------------------------------------
56 Tested with a 16GB class 10 SD card, via the commands:
59 sudo dd bs=${SIZE} count=100 if=/dev/zero of=/dev/sdX oflag=dsync
62 sudo dd bs=${SIZE} count=100 if=/dev/sdX of=/dev/null
68 Mac II running System 6.0.8
70 Apple IIgs using Apple II High Speed SCSI controller card (from v3.3)
71 Symbolics Lisp Machine XL1200, using 1280 byte sectors (from v3.4)
72 PDP-11/73 running RSX11M+ V4.6
73 Microvax 3100 Model 80 running VMS 7.3 (needs patch against v3.5.2 firmware)
74 Amiga 500+ with GVP A530
75 Commodore Amiga 500 KS 1.3 with Oktagon 508 SCSI-2 controller
76 Amiga 2000 (B2000 rev 6.4 ECS) with DKB RapidFire SCSI 1 card
77 Amiga 4000 equipped with CyberStorm PPC using 68pin adapter.
79 Atari TT running TOS 3.06 with HDDRIVER software version 9.06
80 Atari Mega ST 1; TOS 1.04; Protar ProFile 30 external hard drive enclosure (1GB size limitation)
82 needs J3 TERMPWR jumper
83 1GB limit (--blocks=2048000). The OS will fail to read the boot sector if the disk is >= 1GB.
84 Atari Falcon, TOS 4.02, HDDRIVER 9.06 driver
86 SASI models supported. See gamesx.com for information on building a custom cable.
87 needs J3 TERMPWR jumper
88 Set to SCSI ID 3. ID0 will not work.
89 Compaq XP-1000 Professional Workstation
90 Alpha 21264 CPU, 667MHz, with a QLogic SCSI controller in a PCI slot
91 SCSI-based Macintosh Powerbooks (2.5" SCSI2SD)
92 Also reported to work on Thinkpad 860 running Win NT 4.0 PowerPC.
94 Sun 2/120 Workstation (Unit Attention disabled)
96 Data General MV/2500DC running AOS/VS
100 Device-type modifier: 0x4c
103 NeXTcube + NeXTSTEP 3.3
105 Modified geometry settings are required to avoid "cylinder group too large" errors while formatting.
106 (To simulate Quantum Fireball 1050S)
110 4135 cylinder per volume
111 1 spare sector per cylinder
112 2051459 usable sectors on volume
113 Apollo 400/425s running DOMAIN/OS
119 Akai S1000, S3200, S3000XL, MPC 2000XL, DPS 12
120 SCSI cable reversed on S3200
121 There are compatibility problems with the Akai MPC3000. It works (slowly) with the alternate Vailixi OS with multi-sector transfers disabled.
122 EMU Emulator E4X with EOS 3.00b and E6400 (classic) with Eos 4.01
123 EMU E6400 w/ EOS2.80f
125 Ensoniq ASR-X, ASR-10 (from v3.4, 2GB size limit)
126 ASR-10 Requires TERMPWR jumper (applies to pre. 5.0 SCSI2SD boards only)
127 ASR-X resets when writing to devices > 2Gb.
130 See kurzweil.com for size limits which a dependant on the OS version. Older OS versions have a 1GB limit.
133 Requires TERMPWR jumper. The manual shows the pin25 of the DB25 connector is "not connected".
134 May require scsi2sd-config --apple flag
135 Yamaha A5000, A3000, EX5, EX5R
140 HP 16601A, 16700A logic analyzers
142 Reftek RT-72A Seismic datalogger.
143 http://www.iris.iris.edu/passcal/Reftek/72A-R-005-00.1.pdf
144 http://www.iris.iris.edu/passcal/Manual/rtfm.s3a.13.html
145 Konami Simpson's Bowling arcade machine
146 http://forums.arcade-museum.com/showthread.php?p=3027446