Seagate Elite 9, Руководство по эксплуатации продукта

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Elite 9 Product Manual, Rev. C 13
5.3 General performance characteristics
Minimum sector interleave 1:1
Data buffer to/from disc media 960 Kbytes
Data transfer rate (
≤
1 sector)
Minimum 5.67 Mbytes/sec*
Maximum 8.3 Mbytes/sec*
Data transfer rate (< 1 track)
Minimum, divided by interleave factor
4.75 Mbytes/sec
Maximum, divided by interleave factor 6.46 Mbytes/sec
SCSI interface data
Asynch. transfer rate non-wide, max instantaneous
10 Mbytes/sec*, **
Asynch. transfer rate wide, max instantaneous 20 Mbytes/sec*, ***
Synchronous transfer rate fast 0.5 to 10 Mbytes/sec
Synchronous transfer rate wide 5.0 to 20 Mbytes/sec
Sector size
Default
512-byte data blocks
Variable in even-sector sizes 180 to 4,096 bytes
Read/write consecutive sectors on a track Yes
Flaw reallocation performance impact
Spare sectors per track reallocation
Negligible
Spare sectors per cylinder reallocation Negligible
Spare tracks per volume reallocation 35 msec (typical)
Overhead time for head switch 0.8 msec
Overhead time for one-track cylinder switch 1.8 msec (typical)
Average rotational latency 5.55 msec
* Rate measured from the start of the first sector transfer to or from the host.
** Assumes system ability to support 10 Mbytes/sec and no cable loss.
***Assumes system ability to support 20 Mbytes/sec and no cable loss.
5.4 Start/stop time
Disabling the Motor Start option causes the motor to start as soon as power
is applied, causing the drive to become ready within 30 seconds after DC
power is applied at nominal voltage. If a recoverable error condition is
detected during the start sequence, the drive executes a recovery procedure
which may cause the drive to become ready in excess of 30 seconds. During
the start sequence the drive responds to some commands over the SCSI
interface. Stop time is less than 30 seconds (maximum) from removal of DC
power.
Enabling the Motor Start option causes the internal controller to accept the
commands listed in the
SCSI-2 Interface Product Manual (77738479) less
than 3 seconds after applying DC power. After receiving the Motor Start
command, the drive becomes ready for normal operation within 30 seconds
(excluding the error recovery procedure). The Motor Start command can also
be used to command the drive to stop the spindle (see the Start/Stop
command information in the
SCSI-2 Interface Product Manual).
There is no power control switch on the drive.