Seagate Medalist 2160N (ST52160N), Product Manual

Page: 109 / 138

Bytes
Bits
7 6 5 4 3 2 1 0
7 (default) Reserved (00
H
)
changeable 00
H
8 (default) Write retry count (20
H
)
changeable FF
H
9 (default) Reserved (00
H
)
changeable 00
H
10–11 (default) Recovery time limit (FFFF
H
)
changeable 0000
H
Byte 2 When the
automatic write reallocation enabled (AWRE) bit is 1,
the drive automatically reallocates bad blocks detected while
writing to the disc. When the AWRE bit is 0, the drive does not
perform automatic reallocation; instead, the drive reports a
check condition status with a sense key of media error.
Note. The AWRE bit does not apply during the Format com-
mand.
When the
automatic read reallocation enabled (ARRE) bit is 1,
the drive automatically reallocates bad blocks detected while
reading from the disc. When the ARRE bit is 0, the drive does
not automatically reallocate bad blocks. Instead, a check condi-
tion status is reported with a sense key of media error.
The transfer block (TB) bit is not supported.
When the
read continuous (RC) bit is 1, the drive sends all data
without making any corrections. This function supersedes other
bits in this byte. When the RC bit is 0, the correction is performed
according to the other bits in this byte.
When the
enable early recovery (EER) bit is 1, the drive applies
on-the-fly T>1 ECC correction as soon as possible, before it
attempts other retry mechanisms, and without reporting suc-
cessful corrections to the host as a recovered error. Seek error
retries and message system errors are not affected by this bit.
When this bit is set, the DCR bit must be 0. When the EER bit is
0, the drive applies ECC correction before other retry mecha-
nisms, but does not perform T>1 corrections on-the-fly; any
successful correction is reported to the host as a recovered error.
continued from previous page
Medalist Pro 2160N/2160WC Product Manual, Rev. A 99