User Manual

SCSI Commands Reference Manual, Rev. J 388
www.seagate.com Parameters for direct access devices
5.3.7 Background Control mode page (1Ch/01h)
The Background Control mode page (see table 369) is a subpage of the Informational Exception Control mode page (see 5.3.18)
and provides controls over background operations. The mode page policy (see 5.4.14) for this subpage shall be shared.
PS bit, SPF bit, PAGE CODE field, SUBPAGE CODE field, and PAGE LENGTH field
The parameters saveable (PS) bit, the subpage format (SPF) bit, the PAGE CODE field, the SUBPAGE CODE field, and the PAGE LENGTH field are
defined in
5.3.5.
S_L_FULL bit
0 A suspend on log full (S_L_FULL) bit set to zero specifies that the device server shall continue running a background scan operation (see
SPC-5) even if the Background Scan log page (see 5.2.4) contains the maximum number of Background Scan log parameters (see table
277) supported by the logical unit.
1 A S_L_FULL bit set to one specifies that the device server shall suspend a background scan operation if the Background Scan log page
contains the maximum number of Background scan log parameters supported by the logical unit.
LOWIR bit
0 A log only when intervention required (LOWIR) bit set to zero specifies that the device server shall log all suspected recoverable medium
errors or unrecoverable medium errors that are identified during background scan operations in the Background Scan log page.
1 A LOWIR bit set to one specifies that the device server shall only log medium errors identified during back ground scan operations in the
Background Scan log page that require application client intervention.
Table 369 Background Control mode page
Bit
Byte
7 6 5 4 3 2 1 0
0
PS SPF(1b) PAGE CODE (1Ch)
1
SUBPAGE CODE (01h)
2
(MSB)
PAGE LENGTH (000Ch)
3
(LSB)
4
Reserved S_L_FULL LOWIR EN_BMS
5
Reserved EN_PS
6
(MSB)
BACKGROUND MEDIUM SCAN INTERVAL TIME
7
(LSB)
8
(MSB)
BACKGROUND PRE-SCAN TIME LIMIT
9
(LSB)
10
(MSB)
MINIMUM IDLE TIME BEFORE BACKGROUND SCAN
11
(LSB)
12
(MSB)
MAXIMUM TIME TO SUSPEND BACKGROUND SCAN
13
(LSB)
14
Reserved
15