Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
159
18.10.2
Mode Page 00 (Vendor Unique Parameters)
Table 135 Vendor Unique Parameters - Page 00
Byte
Bit
Default
7
6
5
4
3
2
1
0
0
PS 0 Page Code = 00h
80h
1
Page Length = 0Eh
0Eh
2
Reserved
MRG
Reserved
Ignored
00h
3
Reserved
VGMDE
Reserved
RRNDE
Reserved
00h
4
Reserved
00h
5
Reserved
FDD
Reserved
CAEN
Ignored
02h
6
IGRA AVERP Reserved OCT (high nibble)
00h
7
Overall Command Timer (low byte)
00h
8
Reserved
00h
9
Temperature Threshold
00h
10
Command Aging Limit (Hi byte)
00h
11
Command Aging Limit (Low byte)
30h
12
Read Reporting Threshold
16h
13
Write Reporting Threshold
14h
14
DRRT Ignored FFMT Ignored
00h
15
Ignored Reserved FCERT Ignored
Reserved
Ignored
Reserved
00h
Fields marked in the table as 'Ignored' are not used or checked by the drive. They will be initialized to zero but can be
set as desired for compatibility with older drives.
- MRG (Merge Glist into Plist) bit is set to 1 for merging the Glist entries into the Plist during FORMAT UNIT
command.
- VGMDE (Veggie Mode) bit set to 1 will cause the drive to execute random self-seeks. To enable this mode, the
initiator must perform the mode select to set the bit while the drive is spinning, then Stop Unit, then Start Unit.
VGMDE set to 0 disables the self-seeks (normal operation).
- RRNDE (Report Recovered Non Data Errors) bit controls the reporting of recovered Non Data Errors when the
PER bit is set. If RRNDE is set, recovered Non Data Errors are reported. If the RRNDE bit is not set, then
recovered Non Data Errors are not reported.
- FDD(Format Degraded Disable) controls the reporting of Format Degraded sense data for Test Unit Ready
commands when the drive is in a format degraded state. When the FDD bit is one, Format Degraded sense
data will not be reported for a Test Unit Ready command. When the FDD bit is zero, Format Degraded sense
data will be reported for Test Unit Ready commands when the drive is in a format degraded state. This bit does
not affect the reporting of Format Degraded conditions for any media access commands.
- CAEN (Command Aging Enable) When set this bit causes the Command Age Limit timer to be used to avoid
commands waiting in the command queue for an indefinite period. When commands have been in the queue for
a period of time greater than the timer limit they will be reordered to be executed on a first come first served
basis. When this bit is reset, commands are always executed based on the queue reordering rules.