User Manual

SCSI Commands Reference Manual, Rev. J 338
www.seagate.com Parameters for direct access devices
The informational exceptions general parameter data page has the format shown in table 312.
PARAMETER LENGTH field
The PARAMETER LENGTH field is described in 5.2.2. The parameter length shall be at least 04h.
INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE field
If the INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE field contains zero, no informational exception condition is pending and con-
tents of the INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE QUALIFIER field are unspecified. If the INFORMATIONAL EXCEPTION ADDI-
TIONAL SENSE CODE field contains any value other than zero, an informational exception condition exists that has an additional sense code
indicated by INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE field and an ADDITIONAL SENSE CODE QUALIFIER indicated by the INFOR-
MATIONAL EXCEPTION ADDITIONAL SENSE CODE QUALIFIER field.
INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE QUALIFIER field
The INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE QUALIFIER field indicates detailed information related to the condition reported in
the INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE field. If the condition is reported by the device server, the value returned shall be as
defined in
2.4.1.5. If the device server does not have detailed information related to the reported condition, the INFORMATIONAL EXCEPTION
ADDITIONAL SENSE CODE QUALIFIER field shall be set to zero.
MOST RECENT TEMPERATURE READING field
The MOST RECENT TEMPERATURE READING field indicates the temperature in degrees Celsius of the SCSI target device at the
time the LOG SENSE command is performed. Temperatures equal to or less than zero degrees Celsius shall be indicated by a
value of zero. If the device server is unable to detect a valid temperature because of a sensor failure or other condition, the value
returned shall be FFh. The temperature should be reported with an accuracy of plus or minus three Celsius degrees while the
device is operating at a steady state within the environmental limits specified for the device.
VENDOR HDA TEMPERATURE TRIP POINT field
This field indicates the drive HDA temperature, in degrees Celsius, at which the drive will post a status with Sense Key of RECOVERED ERROR or
UNIT ATTENTION and the additional sense code set to WARNING -- SPECIFIED TEMPERATURE EXCEEDED.
MAXIMUM TEMPERATURE
Maximum Temperature field is the maximum temperature in degrees Celsius measured and logged by the device. This parameter value never
decreases. The parameter content of this field ranges from 00h to FFh.
Table 312 Informational exceptions general parameter data
Bit
Byte
7 6 5 4 3 2 1 0
0 (MSB)
PARAMETER CODE (0000h)
1 (LSB)
2 PARAMETER CONTROL BYTE – binary format list log parameter (see 5.2.2.2.2.5)
3 PARAMETER LENGTH (N-3)
4 INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE
5 INFORMATIONAL EXCEPTION ADDITIONAL SENSE CODE QUALIFIER
6 MOST RECENT TEMPERATURE READING
7 VENDOR HDA TEMPERATURE TRIP POINT
8 MAXIMUM TEMPERATURE
9
Vendor specific. . .
11