Data Transfer Rates; Timing Specifications - Maxtor ATLAS 10K IV User Manual

Specifications
4.3

DATA TRANSFER RATES

Data is transferred from the disk to the read buffer at a rate of up to 72 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 320 MB/s in the synchronous
mode. For more detailed information on interface timing, refer to Chapter 6.
4.4

TIMING SPECIFICATIONS

Table 4-3 illustrates the timing specifications of the Maxtor Atlas 10K IV hard
disk drive.
Table 4-3
PARAMETER
Sequential Head Switch Time
Sequential Cylinder Switch Time
Random Average Seek (Read)
Random Average Seek (Write)
Average Rotational Latency
1/3 Stroke Seek (Read)
Full-Stroke Seek
SCSI "Hard Reset Time"
Power On to Drive Ready
Power On to Selection
4-4 Maxtor Atlas 10K IV
Timing Specifications for Maxtor Atlas 10K IV
MAXTOR ATLAS 10K IV 36.8/73.6/147.1 GB
TYPICAL NOMINAL
2
1.25ms typical (read)
1.25 ms typical (write)
3
1.25 ms typical (read)
1.25 ms typical (write)
4
4
5
6
7
8
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.
1
<4.3 ms
4.8 ms
3 ms
<3 ms
£11.0 ms
20 ms
22 seconds
2.5 seconds
1
MAXIMUM
N/A
N/A
4.8 ms
5.3 ms
3 ms
4.5 ms
12.0 ms
20 ms
25 seconds
3 seconds