Hitachi T7K250 - Deskstar - Hard Drive Specifications page 254

F (bit 5)
HSE (bit 4)
Stream ID (bit 0.2)
Feature Previous
Sector Count Current
Sector Count Previous
Sector Number Current
Sector Number Previous
Cylinder Low Current
Cylinder Low Previous
Cylinder High Current
Cylinder High Previous
Input parameters from the device
Sector Number (HOB=0)
If the WC bit is set to one and errors occur in transfer or writing of the data, the device
shall continue to transfer the amount of data requested and then provide ending status with
BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to zero, and the type of
error, ICRC, IDNF or ABRT reported in the error log.
If the WC bit is set to one and the Command Completion Time Limit expires, the device
shall stop execution of the command and provide ending status with the BSY bit cleared to
zero, the SE bit set to one, the ERR bit cleared to zero, and report the fact that the Com-
mand Completion Time Limit expired by setting the CCTO bit in the error log to one.
In all cases, the device shall attempt to transfer the amount of data requested within the
Command Completion Time Limit even if some data transferred is in error.
F specifies that all data for the specified stream shall be flushed to the media before com-
mand complete is reported when set to one.
HSE (Handle Stream Error) specifies that this command starts at the LBA of the last
reported error for this stream, so the device may attempt to continue its corresponding
error recovery sequence where it left earlier.
Stream ID specifies the stream being written. The device shall operate according to the
Stream ID set by the Write Stream command.
The time allowed for the current command's completion is calculated as follows:
Command Completion Time Limit = (content of the Feature register Previous) *
(Identify Device words (99:98)) useconds
If the value is zero, the device shall use the Default CCTL supplied with a previ-
ous Configure Stream command for this Stream ID. If the Default CCTL is zero,
or no previous Configure Stream command was defined for this Stream ID, the
device will ignore the CCTL. The time is measured from the write of the com-
mand register to the final INTRQ for command completion.
The number of continuous sectors to be transferred low order, bits (7:0)
The number of coninuous sectors to be transferred high order, bits
(15:8). If zero is specified in the Sector Count register, then
65,536 sectors will be transferred.
LBA (7:0)
LBA (31:24)
LBA (15:8)
LBA (39:32)
LBA (23:16)
LBA (47:40)
LBA (7:0) of the address of the first unrecoverable error.
Deskstar T7K250 Hard Disk Drive Specification
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