US 7,003,617 B2 · System and method for managing target resets

Abstract

A bus reset control module associated with a fibre-SCSI bridge manages target resets sent from a fibre bus to one or more SCSI buses to reduce or eliminate unnecessary bus resets of SCSI buses having sequential devices, such as tape storage drives. The bus reset control module accepts target resets from a fibre bus host to intercept the initiation of bus resets and communicates with target devices of the SCSI bus to determine whether the target devices are faulty. The bus reset control module issues bus resets to SCSI buses having a faulty target device but prevents issuance of bus resets to SCSI buses that do not have a faulty target device so that a sequential device interfaced with a SCSI bus is not subject to a bus reset if all devices associated with the SCSI bus are operating properly.

Claims20

Dependent claims

A system for managing fibre channel target resets issued to SCSI sequential devices, the system comprising:

a host device operable to communicate information to target devices and to issue target resets for recovery from errors in the communication of information;
a fibre channel bus interfaced with the host device and operable to communicate the target resets;
a fibre-SCSI bridge interfaced with the fibre channel bus and operable to accept the target resets and execute bus resets for associated SCSI buses;
plural SCSI buses interfaced with the fibre-SCSI bridge;
one or more sequential target devices interfaced with each SCSI bus;
and
a bus reset control module associated with the fibre-SCSI bridge and operable to determine whether one or more of the SCSI buses have a faulty target device when the host issues a target reset, the bus reset control module further operable to issue bus resets to SCSI buses having a faulty target device and precluding the issue of bus resets to SCSI buses lacking a faulty target device.

4 more elements

Dependencies are inferred from the claim text.

System and method for managing target resets

Life of this patent

System and method for managing target resets

Life of this patent

Abstract

Claims20