IBM DTCA-24090 Hard Drive Specifications - Page 73

Features Register, 11 Sector Count Register, 12 Sector Number Register, Status Register

Get IBM DTCA-24090 - Travelstar 4.1 GB Hard Drive PDF manuals and user guides View all IBM DTCA-24090 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 73 highlights

Bit Definitions ICRCE (CRC) UNC IDNF (IDN) ABRT (ABT) TK0NF (T0N) AMNF (AMN) Interface CRC Error. C R C = 1 indicates a CRC error has occurred on the data bus during a Ultra-DMA transfer. Uncorrectable Data Error. U N C = 1 indicates an uncorrectable data error has been encountered. ID Not Found. I D N = 1 indicates the requested sector's ID field could not be found. Aborted Command. A B T = 1 indicates the requested command has been aborted due to a device status error or an invalid parameter in an output register. Track 0 Not Found. T 0 N = 1 indicates track 0 was not found during a Recalibrate command. Address Mark Not Found. A M N = 1 indicates the data address mark has not been found after finding the correct ID field for the requested sector. 9.10 Features Register This register is command specific. This is used with the Set Features command, S.M.A.R.T. Function Set commnad and Format Unit command. 9.11 Sector Count Register This register contains the number of sectors of data requested to be transferred on a read or write operation between the host and the device. If the value in the register is set to 0, a count of 256 sectors is specified. If the register is zero at command completion, the command was successful. If not successfully completed, the register contains the number of sectors which need to be transferred in order to complete the request. The contents of the register are defined otherwise on some commands. These definitions are given in the command descriptions. 9.12 Sector Number Register This register contains the starting sector number for any disk data access for the subsequent command. The sector number is from one to the maximum number of sectors per track. In LBA mode, this register contains Bits 0-7. At the end of the command, this register is updated to reflect the current LBA Bits 0-7. 9.13 Status Register Status Register 7 6 5 BSY DRDY DF 4 3 2 1 0 DSC DRQ CORR IDX ERR Figure 43. Status Register Registers 65

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
Bit Definitions
ICRCE (CRC)
Interface CRC Error.
CRC=1 indicates a CRC error has occurred on the data bus
during a Ultra-DMA transfer.
UNC
Uncorrectable Data Error.
UNC=1 indicates an uncorrectable data error has been
encountered.
IDNF (IDN)
ID Not Found.
IDN=1 indicates the requested sector's ID field could not be found.
ABRT (ABT)
Aborted Command.
ABT=1 indicates the requested command has been aborted
due to a device status error or an invalid parameter in an output register.
TK0NF (T0N)
Track 0 Not Found.
T0N=1 indicates track 0 was not found during a Recalibrate
command.
AMNF (AMN)
Address Mark Not Found.
AMN=1 indicates the data address mark has not been
found after finding the correct ID field for the requested sector.
9.10 Features Register
This register is command specific.
This is used with the Set Features command, S.M.A.R.T. Function Set
commnad and Format Unit command.
9.11 Sector Count Register
This register contains the number of sectors of data requested to be transferred on a read or write operation
between the host and the device.
If the value in the register is set to 0, a count of 256 sectors is specified.
If the register is zero at command completion, the command was successful.
If not successfully completed,
the register contains the number of sectors which need to be transferred in order to complete the request.
The contents of the register are defined otherwise on some commands.
These definitions are given in the
command descriptions.
9.12 Sector Number Register
This register contains the starting sector number for any disk data access for the subsequent command.
The
sector number is from one to the maximum number of sectors per track.
In LBA mode, this register contains Bits 0-7. At the end of the command, this register is updated to reflect
the current LBA Bits 0-7.
9.13
Status Register
Status Register
7
6
5
4
3
2
1
0
BSY
DRDY
DF
DSC
DRQ
CORR
IDX
ERR
Figure 43. Status Register
Registers
65