Read Log Sector; Offline Data Collection; Table 4-6 Defined Error Logging Sectors - Western Digital Scorpio ML320S-AF2 Technical Reference Manual

AT Command Set
4.2.3
There are several logs that can be read with the S.M.A.R.T. Read Log Sector sub-command. The LBA
Low Register indicates the log sector to be returned.
Table 4-6. Defined Error Logging Sectors
Log address
04h-05h
08h-0FH
0Ah-0Fh
12h-17h
18h-7Fh
80h-9Fh
A0h-BFh
C0h-DFh
E0h-E1h
E2h-FFh
RO – Read Only
R/W – Read / Write
SMART – Supported by B0h command code.
ExtLog – Supported by 2Fh/3Fh command code.
VS – Vendor Specific
4.2.4
The drive supports offline data collection. The multi-zone error rate is an attribute computed from
data gathered during offline activities. Offline data collection is initiated by either the S.M.A.R.T.
Offline Immediate command or the S.M.A.R.T. Enable Automatic Offline command.
There are two internal firmware timers that control automatic offline data collection. The first internal
firmware timer is referred to as the Spin Timer. The Spin Timer accumulates the number of hours the
drive is powered on. Once this timer reaches 8 hours, an offline data collection is said to be "pending."
The second internal firmware timer is referred to as the Idle Timer. The Idle Timer accumulates the
number of seconds since the drive has received a command from the host. Once the Idle Timer reaches
15 seconds, a "pending" offline data collection process begins. If an in-process automatic offline data
collection process is interrupted by a host command, the automatic offline data collection process will
then resume after 15 minutes of power on followed by 15 seconds of idle time. If the Standby Timer
expires while an offline scan is pending or already in progress, the scan will complete before the drive
spins down.
32

Read Log Sector

00h
01h Summary Log (up to 5 errors)
Comprehensive SMART error log. (5 errors
02h
Extended Comprehensive SMART error log.
03h
(4 errors per sectors)
06h SMART self-test log
07h Extended SMART self-test log
09H Selective self-test log
11h SATA PHY Counters
Reserved for Serial ATA
Host vendor specific
Device vendor specific
SMART Command Transport(SCT)

Offline Data Collection

RELEASED 4/7/11 (WD CONFIDENTIAL)
Content
Log directory
per sectors)
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
WD Scorpio ML320S-AF2
Log Cmds R/W
ExtLog RO
SMART RO
SMART RO
ExtLog RO
Reserved Reserved
SMART RO
ExtLog RO
Reserved Reserved
SMART R/W
Reserved Reserved
ExtLog RO
Reserved Reserved
Reserved Reserved
SMART / ExtLog R/W
SMART / ExtLog VS
Reserved Reserved
SMART / ExtLog R/W
Reserved Reserved
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