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SCSI external cable connector diagrams - Servers (IBM Support) (archived version)
EPRM - SCSI ext. Cables / Terminators and Standards (source material)
System/Adapter SCSI Connectors
SCSI Adapter-to-Device Cables
SCSI Device-to-Device Cables
IBM DASD Options
SCSI Standards and Max. Cable Lengths
MCA SCSI Host Adapters in IBM Systems
System/Adapter SCSI Connectors
(photos and some text from Sandy, original HERE)
IBM's Micro Channel based SCSI adapters and planars use special High Density
Centronics connectors, that are physically incompatible with the "industry
standard" Centronics CN-50 (for SCSI-1) and Micro DB50 (SCSI-2) variants. The
connectors used by IBM are physically smaller (with smaller pins and finer
pin-pitch) and have either 60 (SCSI-1) or 68 (SCSI-2) pins. The two connector
variants are known as HDCN60 and HDCN68 respectively.
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Top: F/W SCSI 68-pin External Cable Connector
Bottom: Narrow SCSI-1 60-pin External Cable Connector
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Top: Narrow SCSI-1 60-pin External Cable Connector
Bottom: Centronics (Amphenol) full-pitch 50-pin SCSI connector
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Terminator for external 60-pin connector.
Used for adapters that don't support auto-termination. Instead of taking the
machine apart to install an internal terminator pack, it's possible to use an
external terminator like the one pictured. (there are 68-pin variants as well)
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| System / Adapter |
Connector |
8556 8557 - Planar 60-pin SCSI
8580 8590 8595 - SPOCK
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| 8640-Server 320 PCI/MCA |
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8641-Server 500 MC (IBM)
68-pin F/W SCSI - Corvette
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8641-Server 500 RAID MC (IBM)
68-pin F/W SCSI - Cheetah
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9556 9557 9576 9577
Planar 50-pin SCSI
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9576i 9577i MC (IBM)
68-pin F/W SCSI - Corvette
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9576i 9577i MC (Future)
50-pin HPDB - Patriot / MCS-700
|
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9585 Mod. xXx, 1NG, V01
Planar 60-pin SCSI |
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9585 Mod. OKx, ONx, Exx
Planar F/W 68-pin SCSI
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9590 MC (IBM)
60-pin SCSI - SPOCK
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9595 Mod. Axx Sxx MC (IBM)
60-pin SCSI - SPOCK
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SCSI-2 Fast MC/A Future Domain
50-pin HPDB - Patriot / MCS-700
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IBM SCSI MC/A
60-pin SCSI - SPOCK
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IBM SCSI-2 Fast/Wide MC/A
68-pin F/W SCSI - Corvette
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IBM SCSI-2 FWSR/A
68-pin F/W SCSI - Cheetah |
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SCSI Adapter-to-Device Cables
| Adapter Connector |
Device Connector |
Len. |
FRU P/N |
OPT P/N |
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1.5m
5ft |
34F0017 |
32G4143 |
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 |
1.5m
5ft |
31F4221 |
31F4187 |
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1.5m
5ft |
92F0321 |
32G3915 |
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1.5m
5ft |
71G2590 |
32G3099 |
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1.5m
5ft |
92F2559 |
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|
 |
1.5m
5ft |
92F0326
52G9501
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32G3913 |
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1m
3ft |
06H3231
06H3228
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PRADC1M
06H3231
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1.5m
5ft |
32G4089 |
PCSC01Y |
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1.5m
5ft |
32G0397 |
8191286 |
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1.5m
5ft |
70G9858 |
SS2C01Y |
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1.5m
5ft |
52G0174 |
SSSPC1Y |
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1.5m
5ft |
06H6036 |
SS2C02Y |
SP - 50-pin Centronics Single-Port for external SCSI Devices with only one SCSI Connector
SCSI Device-to-Device Cables
| Device Connector |
Device Connector |
Len. |
FRU P/N |
OPT P/N |
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1.5m
5ft |
34F0018 |
6451042 |
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0.5m
1.5ft |
92F0325 |
32G3917 |
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0.5m
1.5ft |
31F4222 |
31F4186 |
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0.5m
1.5ft |
92F0442 |
32G3916 |
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0.5m
1.5ft |
92F0441 |
32G3914 |
SP - 50-pin Centronics Single-Port for external SCSI Devices with only one SCSI Connector
IBM DASD Options
| DASD Options |
FRU P/N |
OPT P/N |
MCA |
| SCSI-2 Fast/Wide Adapter/A |
92F0160 |
6451280 |
X |
SCSI-2 Fast/Wide 16-Bit Int. Cable
(68 to 68-pin) 8585/8595 |
92F0327 |
32G3922 |
X |
SCSI-2 Fast/Wide 16-Bit Int. Cable
(68 to 68-pin) 8590 |
61G3511 |
32G3921 |
X |
SCSI-2 Fast/Wide 8-Bit Int. Cable
(50 to 50-pin) 8585/8595 |
61G3005 |
32G3098 |
X |
SCSI-2 Fast/Wide 8-Bit Int. Cable
(50 to 50-pin) 8590 |
61G3508 |
32G3097 |
X |
SCSI-2 Fast/Wide Card to SCSI-2
Fast/Wide Opt.-cable (68 to 68-pin) |
92F0326 |
32G3913 |
X |
SCSI-2 Fast/Wide Card to SCSI-2
Fast/Wide Opt.-cable (68 to 68-pin Short) |
92F0441 |
32G3914 |
X |
SCSI-2 Fast/Wide Card to SCSI
Opt.-cable (68 to 50-pin Long) |
92F0321 |
32G3915 |
X |
SCSI-2 Fast/Wide Card to SCSI
Opt.-cable (68 to 50-pin Short) |
92F0325 |
32G3917 |
X |
SCSI Internal Converter
16-Bit to 8-Bit (68 to 50-pin) |
92F0324 |
32G3925 |
X |
SCSI Card to Opt. Cable
(60 to 50-pin Long) |
34F0017 |
32G4143 |
X |
SCSI-2 Card to Single Port SCSI
Option Cable (68 to 50-pin Long) |
71G2590 |
32G3099 |
X |
SCSI-2 Fast/Wide 16-Bit
Active Terminator (68-pin) |
92F0432 |
32G3918 |
X |
SCSI-2 Fast/Wide 8-Bit
Active Terminator (50-pin) |
92F0057 |
32G3919 |
X |
SCSI Standards and Max. Cable Lengths
| Mode |
Bandwith |
Frequency |
Max Data
Transfer |
Max Cable
Length (SE) |
| SCSI-I |
8-bit |
5 MHz |
5 MB/s |
6 meters |
| SCSI-II |
8-bit |
5 MHz |
5 MB/s |
6 meters |
| Fast SCSI |
8-bit |
10 MHz |
10 MB/s |
3 meters |
| Wide SCSI |
16-bit |
5 MHz |
10 MB/s |
6 meters |
| Fast/Wide SCSI |
16-bit |
10 MHz |
20 MB/s |
3 meters |
MCA SCSI Host Adapters in IBM Systems
| Adapter |
Internal 1 |
Internal 2 |
External |
| SCSI Adapter/A |
50-pin edge |
N/A |
60-pin MCX |
| SCSI Adapter/A (short) |
50-pin edge |
N/A |
60-pin MCX |
| 2/3-Length SCSI/A (Japanese) |
50-pin header |
N/A |
60-pin MCX |
| SCSI Adapter w/Cache |
50-pin edge |
N/A |
60-pin MCX |
| 2/3-Length SCSI/A w/Cache (Japanese) |
50-pin header |
N/A |
60-pin MCX |
| SCSI-2 Fast (Future Domain) |
50-pin header |
N/A |
50-pin HPDB |
| SCSI-2 Fast/Wide Adapter/A |
50-pin edge |
68-pin MCX |
68-pin MCX |
| SCSI-2 F/W Differential Adapter/A |
50-pin edge |
68-pin MCX |
68-pin MCX |
| SCSI-2 F/W RAID Adapter/A |
68-pin edge |
68-pin edge |
N/A |
| SCSI-2 F/W Streaming RAID Adapter/A |
68-pin edge |
68-pin edge |
68-pin MCX |
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