Specifications

Hawk 2XL Product Manual, Rev. B 29
7.0 Defect and error management
The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are
not dependent upon use of defect management routines by the host (initiator).
Defect and error management in the SCSI system involves the drive internal defect/error management and
SCSI systems error considerations (errors in communications between Initiator and the drive). Tools for use in
designing a defect/error management plan are briefly outlined in this section, with references to other sections
where further details are given.
7.1 Drive internal defects and errors
Identified defects are recorded on the drive defects list tracks (referred to as the primary or ETF defect list).
These known defects are reallocated during the initial drive format operation at the factory. (See Section “For-
mat Unit command in SCSI Interface Product Manual). Data correction by ECC will be applied to recover data
from additional flaws if they occur.
Details of the SCSI commands supported by the drive are described in SCSI Product Interface Manual P/N
77738479.
7.2 SCSI systems errors
Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface
Product Manual. Message Protocol System is described in the SCSI Interface Product Manual P/N 77738479.
Several of the messages are used in the SCSI systems error management system. The Request Sense com-
mand returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results
reports the results of diagnostic operations performed by the drive.
Status returned by the drive to the Initiator is described in the SCSI Interface Manual P/N 77738479. Status
reporting plays a role in the SCSI systems error management and its use in that respect is described in sec-
tions where the various commands are discussed.
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