Adaptec GDTSETUP Bedienungsanleitung PDF herunterladen (Seite 34)

16 Bit, wide Fast SE 20 MB/sec. 15 2.0 meters

16 Bit, wide Fast-20, Ultra SE 40 MB/sec. 4 1.5 meters

16 Bit, wide Fast-40, Ultra2 LVDS 80 MB/sec. 15 12 meters

In addition to specifications mentioned above, the following should be kept in mind when

selecting and installing SCSI cables:

 Always install SCSI cables that are as short as possible. The lengths in the table above

are absolute maximum lengths. (Total length of internal and external cables per chan-

nel).

 Avoid using SCSI cables with more connectors than actually needed. Never select a SCSI

mode or operate a SCSI device with a cable that is not appropriate for this mode.

 The minimum distance between two connectors of a SCSI cable is 20 cm.

 Avoid cable stubs. If this is not possible, keep the stub length below 10 cm.

“Star cablings” are not allowed.

 Keep the number of transitions from flat to round cables and vice versa as small as pos-

sible. It is usually best is to use flat or round cables, only.

 Check these points when routing SCSI cables:

- Avoid kinks in the SCSI cable

- Do not roll the SCSI cable up on itself

- Avoid routing the cable next to other cables

- Avoid routing the cable in the vicinity of noise sources such as power supplies

- Avoid routing the cable over sharp edges and in areas where it could get caught up

- Avoid routing/sticking the cable directly onto metal surfaces

When making home-made SCSI cables, make sure that the insulation displacement con-

nectors are properly aligned and firmly pressed into the flat ribbon cable. Otherwise, the

whole cable might turn out to be a big short-circuit. Furthermore, check carefully that PIN 1

of the cable connects to PIN 1 of the connectors. A simple short-circuit and continuity test

before running the devices helps you to save time and money.

The same warnings as for home-made cables apply when you buy non-brand cables. If you

plan to run Fast-20 (Ultra) or Fast-40 (Ultra2) devices, you should explicitly ask your dealer

if these cables are appropriate for the desired mode. (Note: The ICP product range also in-

cludes some high quality SCSI accessories. Please see section B.4.4 of this User's Manual

or check our Website: http://www.icp-vortex.com, for further details).

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Adaptec GDTSETUP Bedienungsanleitung Seite 34