Seagate ST3285N, Product Manual

Page: 123 / 151

When the
param enable bit is 0, the drive does not check parity.
When the param enable bit is 1, the drive checks parity. This bit
is only valid if the soft parity bit is 1.
C.10 Operating page (EEPROM) (00
H
)
The Operating page is shown in the table below. This table shows the
function, the default value, and the changeability of each bit.
The drive accepts an Operating page of two lengths: two bytes or three
bytes. If the length is two bytes, then byte 4, the
spinup delay field, is not
written and is assumed to be unchanged.
In addition to being saved on the media, this vendor-unique page is saved
in an EEPROM that has a life span of 10,000 writes.
Note. The write life span is 10,000 writes. To preserve the write life span
of the EEPROM, the page is not saved to the EEPROM during a
Mode Select command if the new parameters are the same as the
current contents in the EEPROM. When the write life cycle limit is
exceeded, the drive sets the sense key to hardware error and the
additional sense error code to C2
H
. The additional sense error
codes are described in Appendix B.3.
Bit
Byte
7 6 5 4 3 2 1 0
0 PS (1) Page code (00
H
)
1 (default) Page length (02
H
or 03
H
)
default 0 0 0 0 0 0 1 X
changeable 0 0 0 0 0 0 0 1
2 Usage SSM RSVD ATOFF Reserved
default 1 0 0 0 0 0 0 0
changeable 1 1 0 1 0 0 0 0
3 Rsrvd Device type qualifier (00
H
)
default 0 0 0 0 0 0 0 0
changeable 0 1 1 1 1 1 1 1
4 (default) Spinup delay (00
H
)
changeable FF
H
Byte 2 When the usage bit is 1, a warning message is enabled. When
the write life span of the EEPROM is exceeded, a warning
message is generated. See additional sense error code C2 in
ST3655 Family SCSI Drives Product Manual, Rev. A 113