Table 54 Sct Log Page And Direction; Sct Command Transport Feature Set; Table 55 Identify Device Information Word 206 - Hitachi CinemaStar P7K500 Specifications

8.21 SCT Command Transport feature Set

8.21.1 Overview
8.21.1.1
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 54 S CT 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.
8.21.1.2
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 55 Identify Device Information Word 206

8.21.1.3
SCT Command Nesting and intermingling with Standard commands
In general, standard ATA commands can be intermingled with SCT Commands but SCT commands cannot
be nested. SCT commands that do not require a follow-on data transfer operation never have an issue with
being intermixed with any ATA commands or each other. SCT commands that do require data transfer, on
the other hand, may not be nested; that is, if a key command that requires a data transfer is issued, all data
transfer - to or from the host - must complete before another SCT command is issued. In most cases,
however, ATA read/write commands may be inserted in between SCT data transfers, that is, between
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
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 (LBA Segment Access) supported
Action Code 1 (Long Sector Access) supported
SCT Feature Set supported (includes SCT status)
92