Technical data

7.5 SCSI

When using SCSI devices, please make sure that they are correctly configured and connected

to the SCSI controller. In particular SCSI controllers with SCSI BIOS must show a drive during the

system start, so that HDShredder can then address this drive. Furthermore, HDShredder must

support the controller you use. You find a list of the supported SCSI controllers in chapter

3.4.2 Compatibility.

Note: Even if an SCSI controller shows the desired drives during the system start, this is no

guarantee that they are correctly configured or connected. In principle, the BIOS of the SCSI

controller works on a lower level than the SCSI drivers used by HDShredder and can thus pos-

sibly recognize drives which are not recognized by HDShredder itself.

HDShredder has been tested on a range of SCSI controllers. Sporadically encountered prob-

lems are bypassed by the software as far as possible. The following subchapters contain useful

hints on how to solve further random or sporadic problems. These hints should be applied in

the described order to minimize the effort, if possible. The following problems occurred during

the tests and could be bypassed with the hints from the following subchapters:

• HDShredder stops during device recognition (5.6 Selecting the deletion area)

• no SCSI drives are recognized

• not all SCSI drives are recognized

7.5.1 Restart

If HDShredder stops during the start procedure or does not show the desired SCSI drives, try a

restart in form of a warm boot (reset button). Only if this does not fix the problem, you should

try a cold start (switch off the PC and leave it switched off for about 30 seconds). Both forms

of the restart can counter signal and status problems of SCSI controllers.

7.5.2 Deactivate unused controllers

If a restart does not lead to the desired result, you should deactivate unused controllers, if your

system contains several SCSI controllers. This is also recommended if a controller is principally

used, but the drives connected to it are not needed for using HDShredder.

7.5.3 Deactivate unused drives

In some cases, SCSI drives, which are connected to the same controller, may interfere with

each other or even with the controller itself. Deactivate individual drives as a test or connect

them step by step one by one to find out which drive possibly causes an interference. Make

sure that the last SCSI device is always terminated, even during the tests.

7.5.4 Minimum configuration of the controller

Configuring the SCSI controller using its BIOS setup (or the BIOS setup of the PC in case of on -

board controllers) can also solve the problem. Set the lowest or the safest values for the SCSI

bus (e.g. transmission in the narrow mode of a wide controller).