Power Saving Mode; Automatic Rewrite/Reallocate - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

10.8 Power Saving Mode

Power save function will save power consumption while the drive is idle. The drive automatically transfers
its operating mode according to the event and timer.

10.9 Automatic Rewrite/Reallocate

The target supports Auto and Recommended Reallocate for READ, WRITE, WRITE VERIFY and
VERIFY.
Automatic and Recommend Reallocate operate from within the read/write command. When an automatic
reallocation occurs, the read or write command takes longer to complete.
This operation is sometimes referred to as autoreassignment due to it's similarity to the operation performed
by the reassign command.
Following is a description of the target behaviour for each setting of ARRE. A R R E setting effects all data
errors.(No Sector Found, Data Sync Byte Errors and Data ECC Errors.)
ARRE=1 : An error site determined to need rewriting or reallocation during a read is automatically
rewritten or reallocated at the conclusion of the read and prior to sending the status. The
site will be automatically rewritten or reallocated only if the data has been successfully read.
ARRE=0 : An error site determined to need rewriting or reassignment during a read is recommended
for rewriting or reassignment at the conclusion of the read.
The setting of the A R R E bit is checked and the target will automatically rewrite/reallocate or recommend
rewrite/reassign for the following commands.
Read(6)
Read(10)
Verify
Verify Portion of Write and Verify
For all other commands the A R R E setting is ignored and the target will not automatically rewrite/reallocate
or recommend rewrite/reassign.
Following is a description of the target behaviour for each setting of AWRE. AWRE setting effects only No
Sector Found Errors on writes.
AWRE=1 : An error site determined to need reassignment during a write is automatically reallocated at
the conclusion of the write and prior to sending the status. The site will be automatically
reallocated only if the write recovery succeeded at the conclusion of the write.
AWRE=0 : An error site determined to need reassignment during a write is recommended for reassign-
ment at the conclusion of the write.
The setting of the AWRE bit is checked and the target will automatically reallocate or recommend reassign
for the following commands.
Write(6)
Write(10)
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O E M Spec. of DDRS-3xxxx