Data Integrity; Data Loss On Power Off; Write Cache; Equipment Status - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

5 Data integrity

5.1

Data loss on power off

Data loss will not be caused by a power off during any operation except the write operation.
A power off during a write operation causes the loss of any received or resident data that has not been
written onto the disk media.
A power off during a write operation might make a maximum of one sector of data unreadable. This
state can be recovered by a rewrite operation.
5.2

Write Cache

When the write cache is enabled, the write command may complete before the actual disk write operation finishes.
This means that a power off, even after the write command completion, could cause the loss of data that the drive
has received but not yet written onto the disk.
In order to prevent this data loss, confirm the completion of the actual write operation prior to the power off by
issuing a
Soft reset
Hard reset
Flush Cache command
Standby command
Standby Immediate command
Sleep command
Confirm the command's completion.
5.3

Equipment status

The 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 the power-on time and will be maintained until the following conditions are satisfied:
The access recalibration/tuning is complete.
The spindle speed meets the requirements for reliable operation.
The self-check of the drive is complete.
The appropriate error status is made available to the host system if any of the following conditions occur after the
drive has become ready:
The spindle speed lies outside the requirements for reliable operation.
The occurrence of a Write Fault condition.
Travelstar 5K160 (PATA) Hard Disk Drive Specification
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