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Troubleshooting SCSI/SMDI

A brief description of some common problems encountered with SCSI and samplers follows.

Conflicting SCSI IDs

When connecting devices on a SCSI chain, each device must have a unique device identifier (ID). SCSI allows for up to eight unique ID values, numbered 0 to 7. Typically, device ID 7 is used for the internal SCSI controller card, leaving ID 0 through 6 for other devices.

Note: The ID of a bootable SCSI hard drive must be set to 0.

The following table describes a typical SCSI configuration:

ID Device(s)

0Hard Drive

1CD-ROM Drive

2-6 Samplers

7SCSI Controller Card

Periodic transfer failures

Messages such as “The SCSI Device is not responding” or “A problem was encountered while transferring the sample” may indicate a problem with a SCSI bus.

1.From the Tools menu, choose Sampler. The Sampler dialog appears.

2.Click Configure. The Sampler Configuration dialog appears.

3.Repeat the selection of the SCSI host. This causes a series of SCSI commands to be executed that may settle the bus.

If the problem persists, power-down and restart all equipment.

Sampler is recognized but does not transfer reliably

The following are possible causes of unreliable SCSI transfers.

Synchronous transfer mode

Select samplers (the Kurzweil K2000 among them) do not operate properly if there is a SCSI device set to synchronous transfer mode on the same SCSI chain. SCSI hard drives and CD-ROMs often have the option of using a synchronous transfer mode. If there is a host versus device synchronous transfer option, select the host option. Refer to the SCSI device’s documentation for more information.

SCSI termination

If the SCSI chain is not properly terminated, unreliable SCSI transfers may be experienced. Refer to the SCSI card and SCSI device documentation for more information.

Long or faulty SCSI cables

SCSI cables that are very long or not properly shielded may not operate reliably. In addition, do not use cables that are not certified SCSI cables.

CHP. 14

SAMPLING