Table 36 Sct Log Page And Direction; Table 37 Identify Device Information Word 206 - Hitachi HDS723020BLA642 Specifications

9.18 SCT Command Transport feature Set
9.18.1 Overview
9.18.1.1
Introduction
SMART Command Transport (SCT) is the method for the drive to receive commands using log page E0h and
transporting data using log page E1h. These log pages are used as follows:
Write log page
Read log page

Table 36 SCT Log Page and direction

There are two ways to access the log pages: using SMART READ/WRITE LOG and READ/WRITE LOG EXT.
Both sets of commands access the same log pages and provide the same capabilities.
The log directory for log pages E0h and E1h should report a length of one. The length of log page E1h does not
indicate the length of an SCT data transfer.
If SMART is supported, but not enabled, the drive supports SMART READ/WRITE LOG for Log page E0h and
E1h.
If security is enabled and password has not been issued to unlock the device, all SCT commands will fail.
9.18.1.2
Capability definition
Capability Identification is performed by issuing Identify Device command. Word 206 of Identify Data is used to
determine if SCT is enabled and which SCT Action Codes are supported.
Word
206 SCT Command set support
15-12
11-6
5
4
3
2
1
0

Table 37 Identify Device Information Word 206

Log page E0h Log Page E1h
Issue Command Send Data to the drive
Return Status Received Data from the drive
Description
Vendor Specific
Reserved
Action Code 5 (SCT Data Table) supported
Action Code 4 (Features Control) supported
Action Code 3 (Error Recovery Control) supported
Action Code 2 (SCT Write Same) supported
Obsolete
SCT Feature Set supported (includes SCT status)
Hitachi hard disk drive specifications
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