4.0 Data integrity
The drive retains recorded information under all non-write operations.
N o more than one sector can be lost by power down during write operation while write cache is disabled.
If power down occurs before completion of data transfer from write cache to disk while write cache is
enabled, the data remaining in write cache will be lost. To prevent this data loss at power off, the following
action is recommended:
To confirm successful completion of SYNCHRONIZE CACHE (35h) command.
4.1 Equipment Status
Equipment status is available to the host system any time the drive is not ready to read, write, or seek. This
status normally exists at power-on time and will be maintained until the following conditions are satisfied.
Access recalibration/tuning is complete.
Spindle speed meets requirements for reliable operations.
Self-check of drive is complete.
Appropriate error status is made available to the host system if any of the following condition occurs after
the drive has become ready:
Spindle speed goes outside of requirements for reliable operation.
“Write fault” is detected.
4.2 Error Recovery
Errors occurring with the drive are handled by the error recovery procedure.
Errors that are uncorrectable after application of the error recovery procedures are reported to the host
system as non-recoverable errors.
Copyright IBM Corp. 1996
17
Summary of Contents for DCAS-32160 - Ultrastar 2.1 GB Hard Drive
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Page 19: ...Part 1 Functional Specification Copyright IBM Corp 1996 5...
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Page 57: ...6 7 1 3 80 pin Model Figure 36 Outline of 80 pin Model Specification 43...
Page 61: ...6 7 3 3 80 pin Model Figure 41 Interface Connector 80 pin Model Specification 47...
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Page 71: ...Part 2 SCSI Interface Specification Copyright IBM Corp 1996 57...
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Page 232: ...IBML Part Number 73H7993 Published in Japan S73H 7993 03...