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4-4 Maxtor Atlas 10K III
Data is transferred from the disk to the read buffer at a rate of up to 55 MB/s in
bursts. Data is transferred from the read buffer to the SCSI bus at a rate of up to
6 MB/s in the asynchronous mode, or at up to 160 or 320 MB/s in the
synchronous mode. For more detailed information on interface timing, refer to
Chapter 6.
Table 4-3 illustrates the timing specifications of the Maxtor Atlas 10K III hard
disk drive.
Timing Specifications for Maxtor Atlas 10K III
1. Typical specifications assume 25°C ambient temperature, nominal supply
voltages, and no applied shock or vibration. Maximum specifications
assume worst case extremes of operating temperature, humidity, and
supply voltages.
2. Sequential Head Switch Time is the time from the conclusion of the last
sector of a track to the beginning of the first logical sector on the next
track of the same cylinder.
3. Sequential Cylinder Switch Time is the time from the conclusion of the
last sector of a cylinder to the first logical sector on the next cylinder.
4. Random LBA.
5. 1/3 Stroke Seek is defined as any seek of maximum length cylinder/3. 1/
3 stroke seek may include one head switch.
6. Full Stroke Seek is defined as a seek from cylinder 0 to maximum cylinder
or vice versa. Full stroke may include one head switch.
7. SCSI “Hard Reset Time” is the time from Reset to Selection.
8. At power on, startup error algorithms are used and may extend the
time to Drive Ready to as long as 30 seconds.
Sequential Head Switch Time ≤ .27 ms typical (read)
≤
N/A
Sequential Cylinder Switch Time
≤ .3 ms typical (read)
≤
N/A
Random Average Seek (Read)
<4.5 ms 5.1 ms
Random Average Seek (Write)
5.0 ms 5.5 ms
Average Rotational Latency 3 ms 3 ms
1/3 Stroke Seek (Read)
<4 ms 4.5 ms
Full-Stroke Seek
≤11.0 ms 13.0 ms
SCSI “Hard Reset Time”
20 ms 20 ms
Power On to Drive Ready
22 seconds 25 seconds
Power On to Selection 2.5 seconds 3 seconds