Duplicate SCSI Device Entries Appear in Device Manager

 Last reviewed: August 30, 1996
Article ID: Q132770
The information in this article applies to:
  • Microsoft Windows 95

SYMPTOMS

Duplicate SCSI device entries appear in Device Manager, and many unexplained drive letters appear in Windows Explorer or My Computer.

CAUSE

A SCSI device is installed that has the same device ID of 2, 7, or 15 as another SCSI device detected on the computer.

Duplicate SCSI device entries appear in Device Manager when a SCSI device with an ID of 7 or 15 is put on the same SCSI ID as the SCSI controller. SCSI controllers are typically on SCSI ID 7 or ID 15 (on a wide SCSI interface).

If a SCSI device detects another device on ID 2, it usually means that two SCSI controllers are using the same chain on ID 2.

RESOLUTION

If a SCSI device conflicts with another SCSI device on ID 7 or ID 15 (on a wide SCSI interface), change the SCSI ID of the duplicated SCSI device to an unused ID, such as 3, 4, 5, or 6.

If two SCSI controllers conflict with each other on ID 2, break the chain. For example, make sure the internal cable goes only to the internal device (or devices), not to a PCI card.

KBCategory: kbsetup kbenv kbui kbhw
KBSubcategory: posfest win95 winpnp
Additional reference words: 95 scsi

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Last reviewed: August 30, 1996
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