Read Long [22H, 23H] - Hitachi C4K60 - Travelstar Slim - Hard Drive Specifications

7.5.18. Read Long [22h, 23h]

Task File Registers
Command
LBA High
LBA Mid
LBA Low
Device/Head
Sector Count
Features
The READ LONG command performs similarly to the READ SECTORS command except that it returns the
data and the ECC bytes contained in the data field of the desired sector. During a READ LONG command,
the device does not check the ECC bytes to determine if there has been a data error. Only single sector read
long operations are supported. The number of ECC bytes transferred will be 4 Bytes (Default). If the ECC
transfer length is changed by Feature register 44h, 68 bytes of ECC will be transferred.
K6610170
Rev.2
Dec 22, 2004
7 6 5 4
22h or 23h
L = 0: Cylinder number bit 15 - 8
L = 1: 28-bit LBA address bit 23 - 16
L = 0: Cylinder number bit 7 - 0
L = 1: 28-bit LBA address bit 15 - 8
L = 0: Sector number
L = 1: 28-bit LBA address bit 7 - 0
X L X DRV L = 0:
- 83 -
3 2 1
Head Number
L = 1:
28-bit LBA address
bit 27-24
01h
XX
0