14 mode page 1c (informational exceptions control) – Hitachi ULTRASTAR 15K450 HUS154530VLF400 User Manual
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Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
193
19.10.14 Mode Page 1C (Informational Exceptions Control)
Table 160: Page 1C (Informational Exceptions Control)
•PERF (Performance) bit is not supported and is ignored. Informational Exception operations will not cause performance
delays.
• EBF (Enable Background Function) bit is not supported and is ignored. Background functions are always enabled.
• EWASC (Enable Warning ASC) bit of zero indicates that Temperature Warnings will not be reported. An EWASC bit of
one allows Temperatuer Warnings to be reported, if the temperature inside the disk enclosure exceeds the threshold
set in Mode Page 00h. The Method of Reporting field controls the reporting method. EWASC is independent of
DEXCPT.
• DEXCPT (Disable Exception Control) bit of zero indicates information exception operations are enabled. The reporting
of information exception conditions when the DEXCPT bit is set to zero is determined from the Method of Reporting
field. A DEXCPT bit of one indicates the Target disabled all information exception operations.
• TEST bit of one instructs the drive to generate false drive notifications at the next interval time, (as determined by the
INTERVAL TIMER field), if the DEXCPT is zero. The Method of Reporting and Report Count would apply. The
false drive failure is reported as sense qualifier 5DFFh. The TEST bit of zero instructs the drive to stop generating
any false drive notifications.
• Enable Background Error (EBACKERR) bit of zero disables reporting of background self-test errors and background
scan errors via Information Exceptions Control. An EBACKERR bit of one enables reporting of these background
errors. The method of reporting these errors is determined from the MRIE field.
• LOGERR (Log Errors) is not used and ignored internally by the Target.
Byte
BIT
7
6
5
4
3
2
1
0
Default
0
PS
0
Page Code = 1Ch
9Ch
1
Page Length = 0Ah
0Ah
2
PERF
RSVD
EBF
EWASC DEXCPT
TEST
EBACK-
ERR
LOGERR
10h
3
Reserved = 0
Method of Reporting
00h
4-7
(MSB)
Interval Timer
(LSB)
00h
00h
00h
00h
8-11
(MSB)
Report Count
(LSB)
00h