User Manual

SCSI Commands Reference Manual, Rev. J 350
www.seagate.com Parameters for direct access devices
5.2.15.3 Pending Defect log parameter
A Pending Defect log parameter has the format defined in table 329. If no unrecovered errors have occurred then no Pending
Defect log parameters shall be present. A Pending Defect log parameter shall be added for each LBA for which the device server
has detected an unrecovered medium error that is not:
a) a pseudo unrecovered read error (see SPC-5);
b) a predicted unrecovered read error (see SPC-5); or
c) a predicted unrecovered write error (see SPC-5).
If all of the supported parameter code values have been used and a new defect is discovered, then the device server shall not
add more Pending Defect log parameters and the PENDING ERROR COUNT field shall not be changed.
Pending Defect log parameters may be duplicates of Background Scan parameters in the Background Scan log page (see 5.3.4).
A Pending Defect log parameter shall be removed if the indicated LBA:
a) is reassigned without error;
b) is written without error; or
c) is read without error.
A Pending Defect log parameter may be removed if the indicated LBA is unmapped without error.
A sanitize overwrite operation (see
SPC-5) and a format operation (see 3.3.1) shall cause all Pending Defect log parameters to be
removed.
PARAMETER CODE field
The PARAMETER CODE field is described in 5.2.2.2.2 and shall be set as defined in table 329 for a Pending Defect log parameter.
PARAMETER LIST LENGTH field
The PARAMETER LIST LENGTH field is defined in 5.2.2 and shall be set to the value defined in table 329 for a Pending Defect log parameter.
ACCUMULATED POWER ON HOURS field
The ACCUMULATED POWER ON HOURS field indicates the number of hours that the device server has been powered on since manufacturing
at the time the Pending Defect log parameter was created. A value of FFFF_FFFF_FFFF_FFFFh indicates that the accumulated power on hours
value is unknown.
LOGICAL BLOCK ADDRESS field
The LOGICAL BLOCK ADDRESS field indicates the LBA associated with the unrecovered medium error.
Table 329 Pending Defect log parameter format
Bit
Byte
7 6 5 4 3 2 1 0
0 (MSB)
PARAMETER CODE (0001h to F000h)
1 (LSB)
2 PARAMETER CONTROL BYTE – binary format list log parameter (see 5.2.2.2.2.5)
3 PARAMETER LENGTH (14h)
4 (MSB)
ACCUMULATED POWER ON HOURS. . .
n (LSB)
4 (MSB)
LOGICAL BLOCK ADDRESS. . .
n (LSB)