|
|
|
|
|
IDE/SCSI
Inferface Reference Chart
StorCase Products are designed for compatibility with a variety of SCSI
and IDE interface technologies, each which correspond to specific data transfer
rates, cable length limitations, and connector types. The following cross-reference
chart provides a quick guide to the various SCSI and IDE interface parameters:
Interface
Type |
Device
Connector
Type |
Bus
Width |
Signal4 |
Max.
Transfer Rate1 |
Max.
Devices per Bus |
Max. Cable
Length2,3 |
| AT/IDE |
40-pin |
16-bit |
n/a |
8 |
2 |
18" |
| Enhanced IDE |
40-pin |
16-bit |
n/a |
16 |
4 |
18" |
| IDE Ultra DMA/33 |
40-pin |
16-bit |
n/a |
33 |
4 |
18" |
| IDE Ultra DMA/66 |
40-pin |
16-bit |
n/a |
66 |
4 |
18" |
| IDE Ultra DMA/100 |
40-pin |
16-bit |
n/a |
100 |
4 |
18" |
| |
| SCSI 1 Narrow |
50-pin Centronics |
8-bit |
S.E. |
5 |
7 |
19.7' or 6m |
| SCSI 2 Narrow |
HD50 |
8-bit |
S.E. |
10 |
7 |
9.8' or 3m |
| SCSI 3 Wide |
HD68 |
16-bit |
S.E. |
20 |
15 |
9.8' or 3m |
| SCSI 3 Wide Diff. |
HD68 |
16-bit |
HVD |
20 |
15 |
82' or 25m |
| SCSI 3 Wide Ultra |
HD68 |
16-bit |
S.E. |
40 |
3 or less
15 |
9.8' or 3m
4.9' or 1.5m |
| SCSI 3 Wide Ultra2 |
VHDCI |
16-bit |
LVD/S.E. |
80 |
15 |
39' or 12m |
| SCSI 3 Wide Ultra160 |
VHDCI |
16-bit |
LVD/S.E. |
160 |
15 |
39' or 12m |
Note: SCSI 3 devices can also be found with 80-pin SCA connections.
1 In Mbytes/sec.
2 Total cable length, internal and external.
3 Listed maximum bus lengths may be exceeded in point-to-point and/or backplane applications.
4 If S.E. devices exist on an LVD bus, entire bus switches to S.E. mode and cable lengths specified for S.E. interface types apply.
Abbreviation Key:
| AT/IDE |
- Advanced Technology/Integrated Drive Electronics |
| DMA |
- Direct Memory Access |
| SCSI |
- Small Computer Systems Interface |
| S.E. |
- Single-Ended |
| HVD |
- High Voltage Differential |
| LVD |
- Low Voltage Differential |
| HD |
- High Density |
| VHDCI |
- Very High Density Cable Interconnect |
| SCA |
- Single Connector Attachment |
|
|
|
