Datasheet
Travelstar 80GN Hard Disk Drive Specification
183
13.44 Write Long (32h/33h)
Table 127: Write Long (32h/33h)
The Write Long command transfers the data and the ECC bytes of the designated one sector from the host to the
device, then the data and the ECC bytes are written to the disk media.
After 512 bytes of data have been transferred, the device will keep setting DRQ = 1 to indicate that the device is
ready to receive the ECC bytes from the host. The data is transferred 16 bits at a time and the ECC bytes are trans-
ferred 8 bits at a time. The number of ECC bytes are either 4 or 40 according to setting of the Set Feature option.
The default number after power on is 4 bytes.
Output parameters to the device
Sector Count This indicates the number of continuous sectors to be transferred. The Sector Count must
be set to one.
LBA Low This indicates the sector number of the sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 0–7. (L = 1)
LBA High/Mid This indicates the cylinder number of the sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 8–15 (Mid) and bits 16–23 (High)
(L = 1)
H This indicates the head number of the sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 24–27. (L = 1)
R The retry bit, but this bit is ignored.
Input parameters from the device
Sector Count This indicates the number of requested sectors not transferred.
LBA Low This indicates the sector number of the sector to be transferred. (L = 0)
In LBA mode this register contains the current LBA bits 0–7. (L = 1)
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature - - - - - - - - Error see below
Sector Count 0 0 0 0 0 0 0 1 Sector Count - - - - - - - V
LBA Low V V V V V V V V LBA Low V V V V V V V V
LBA Mid V V V V V V V V LBA Mid V V V V V V V V
LBA High V V V V V V V V LBA High V V V V V V V V
Device 1 L 1 D H H H H Device - - - - H H H H
Command 0 0 1 1 0 0 1 R Status see below
Error Register Status Register
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
000V0V0 0 0VVV- 0- V