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Hitachi HTS725050A9A364 Datasheet Page 107

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7K500 OEM Specification
Page 107 of 176
14.16
14.1614.16
14.16 Read
Read Read
Read FP
FPFP
FPDMA
DMA DMA
DMA Queued
QueuedQueued
Queued (
( (
(60
6060
60h)
h) h)
h)
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 Low -
-
-
-
-
-
-
-
Data Low -
-
-
-
-
-
-
-
Data High -
-
-
-
-
-
-
-
Data High -
-
-
-
-
-
-
-
Current V
V
V
V
V
V
V
V
Error ...See Below... Feature
Previous V
V
V
V
V
V
V
V
Current T
T
T
T
T
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Sector Count
Previous P
-
-
-
-
-
-
-
Sector Count
HOB=1
-
-
-
-
-
-
-
-
Current V
V
V
V
V
V
V
V
HOB=0
V
V
V
V
V
V
V
V
LBA Low
Previous V
V
V
V
V
V
V
V
LBA Low
HOB=1
V
V
V
V
V
V
V
V
Current V
V
V
V
V
V
V
V
HOB=0
V
V
V
V
V
V
V
V
LBA Mid
Previous V
V
V
V
V
V
V
V
LBA Mid
HOB=1
V
V
V
V
V
V
V
V
Current V
V
V
V
V
V
V
V
HOB=0
V
V
V
V
V
V
V
V
LBA High
Previous V
V
V
V
V
V
V
V
LBA High
HOB=1
V
V
V
V
V
V
V
V
Device F
1
-
-
-
-
-
-
Device -
-
-
-
-
-
-
-
Command 0
1
1
0
0
0
0
0
Status ...See Below...
Error Register
Status Register
7 6 5
4 3
2 1 0
7 6 5
4 3 2 1 0
CRC
UNC
0
IDN
0
ABT
T0N
AMN
BSY
RDY
DF
DSC
DRQ
COR
IDX
ERR
V V 0
V 0
V 0 0
0 V 0
V - 0 0 V
Table 71 Read FPDMA Queued Command (60h)
The Read FPDMA Queued command reads one or more sectors of data from disk media, then
transfers the data from the device to the host.
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Output Parameters To The Device
Feature Current
The number of sectors to be transferred low order, bits (7:0)
Feature Previous
The number of sectors to be transferred high order, bits (15:8)
T
TAG value. It shall be assigned to be different from all other queued commands.
The value shall not exceed the maximum queue depth specified by the Word 75 of the
Identify Device information.
LBA Low Current
LBA (7:0)
LBA Low Previous
LBA (31:24)
LBA Mid Current
LBA (15:8)
LBA Mid Previous
LBA (39:32)
LBA High Current
LBA (23:16)
LBA High Previous
LBA (47:40)
F
FUA bit. When the FUA bit is set to 1, the requested data is always retrieved from
the media regardless of whether the data are held in the sector buffer or not. When
the FUA bit is set to 0, the data may be retrieved from the media or from the cached
data left by previously processed Read or Write commands.
P
Priority bit. When the Priority bit is set to 1, the device attempts to provide better
quality of service for the command than normal priority commands.
Input Parameters From The Device
LBA Low (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
LBA Low (HOB=1)
LBA (31:24)of the address of the first unrecoverable error.
LBA Mid (HOB=0)
LBA (15:8)of the address of the first unrecoverable error.
LBA Mid (HOB=1)
LBA (39:32)of the address of the first unrecoverable error.
LBA High (HOB=0)
LBA (23:16)of the address of the first unrecoverable error.
LBA High (HOB=1)
LBA (47:40)of the address of the first unrecoverable error.
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