Introduction; General; Terminology; Deviations From Standard - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

8.0 General

8.1 Introduction

This specification describes the host interface of the HDT7250xxVLATy0 hard disk drive.
The interface conforms to the Working Document of Information technology, AT Attachment with Packet Interface
Extension (ATA/ATAPI-7) Revision 4, dated 23 December 2003, with certain limitations described in Section 8.3
below.

8.2 Terminology

Device
Host

8.3 Deviations from standard

The device conforms to the referenced specifications with the following deviations:
Check Power Mode
Hard Reset
Download
Streaming Commands
Error Recovery Control SCT Command set)
Device indicates HDT7250xxVLATy0
Host indicates the system that the device is attached to
Check Power Mode command returns FFh to Sector Count Register when
the device is in Idle mode. This command does not support 80h as the
return value.
Hard reset response is not the same as that of power on reset. Refer to
section 7.1, "Reset response" on page 55 for details.
Download command is aborted when teh device is in security locked
mode.
When the device is in standby mode,Streaming Commands can't be
completed while waiting for the spindle to reach operating speed even if
execution time exceeds specified CCTL(Command Completion Time
Limit). The minimum CCTL is 50ms.CCTL is set to 50ms when the
specified value is shorter than 50ms.
When the device is in standby mode,any command where error recovery
time limit is specified can't be completed while waiting for the spindle to
reach operating speed even if execution time exceeds specified recovery
time limit.The minimum time limit is 6.5 second.When the specified time
limit is shorter than 6.5 second,the issued command is aborted.
Deskstar T7K500 Hard Disk Drive Specification
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