Fujitsu MBA3073NC - Enterprise 73.5 GB Hard Drive Product Manual page 20

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When Write cache is enabled, you should ensure that the cached
data is surely flushed to the disk media before you turn off the
HDD's power.
To ensure it, you should issue either the SYNCHRONIZE CACHE
command or the STOP UNIT command with specifying "0" to the
Immediate bit and then confirm that the command is surely
terminated with the GOOD STATUS.
Command queuing feature
The HDD can queue maximum 128 commands, and optimizes the issuing order of queued
commands by the reordering function. This feature realizes the high speed processing.
Reserve and release functions
The HDD can be accessed exclusively in the multi-host or multi-initiator environment by using
the reserve and release functions.
Error recovery
The HDD can try to recover from errors in SCSI bus or the HDD using its powerful retry
processing. If a recoverable data check occurs, error-free data can be transferred to the initiator
after being corrected in the data buffer. The initiator software is released from the complicated
error recover processing by these error recovery functions of the HDD.
Automatic alternate block reassignment
If a defective data block is detected during read or write the HDD can automatically reassign its
alternate data block.
Programmable data block length
Data can be accessed in fixed-block length units. The data block length is programmable, and can
be specified at initializing with a multiple of four within the range of 512 to 528 bytes.
Error rate increase
1. The HDD format at factory shipment is generally 512 byte.
2. The Recoverable Error of the drive might increase when the
format would be modified from 512 bytes to the following values:
516 bytes, 520 bytes, 524 bytes, and 528 bytes.
3. The Recoverable Error referred in 2) is sense data (1-13-xx).
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