Filter
Top Products
360014937
Copyright © 2000 Toshiba corporation. All rights reserved.
-
551 -
10.7.1.6 Security commands
Password information is transferred during the execution of following four commands.
1) Disable password
2) Erase Unit
3) Set Password
4) Unlock
Data in the register and on the media correspond to each other as follows:
A15 - A8 A7 - A0
transfer 1 D2 D1
transfer 2 D4 D3
: : :
: : :
transfer 256 D512 D511 D1 D2 --- D512 E1 --- E4
transfer 257 E1
: E2
: :
transfer 260 E4
DATA REGISTER DATA FLOW ON THE MEDIA
10.7.2 Error Register
- CS0 DA2-DA0 : 1 Read ONLY
10.7.2.1 Operational Mode
The following descriptions are bit definitions for the operational mode including the error information from the
last command. This command is valid only when the ERROR BIT (bit 0) is set.
ICRC UNC MC IDNF MCR ABRT TK0NF AMNF
Bit 7 Interface CRC error was found during the transfer of Ultra DMA.
2
Bit 6
UNC (Uncorrectable Data Error) -- This bit indicates that an uncorrectable error has been encountered in the
data field during a read command.
Bit 5
MC (Media Changed) -- This bit is reserved for use by removable media devices and indicates that new
media is available to the operating system.
Bit 4
IDNF
(ID Not Found) --The requested sector could not be found.
Bit 3
MCR
(Media Change Requested) is reserved for use by removable media devices and indicates that a
request for media removal has been detected by the device.
Bit 2
ABRT (Aborted Command) -- This bit Indicates that the requested command has been aborted due to the
reason reported in the drive status register (Write Fault, Not Seek Complete, Drive Not Ready, or an invalid
command). The status registers and the error registers may be decoded to identify the cause.
Bit 1
TK0NF
(Track 0 Not Found) -- This bit is set to indicate that the track 000 has not been found during a
Recalibrate command.
Bit 0
AMNF (AM Not Found) -- This bit is set to indicate that the required Data AM pattern on read operation has
not been found.
2
ATA-2 Notes: Prior to the development of ATA-2 standard, this bit was defined as BBK (Bad Block Detected) -- This bit was used to
indicate that the block mark was detected in the target’s ID field. The mark does not exist when shipping from the factory.The Mark
will be written by FORMAT command. Read or Write commands will not be executed in any data fields marked bad. The drive does
not support this bit.