Timing Specifications; Table 4-3 Timing Specifications - Quantum FIREBALL PLUS AS 10.2 Product Manual

Specifications
4.4 4.4 4.4 4.4

TIMING SPECIFICATIONS

TIMING SPECIFICATIONS TIMING SPECIFICATIONS TIMING SPECIFICATIONS
Table 4-3 illustrates the timing specifications of the Quantum Fireball Plus AS hard
disk drives.
PARAMETER PARAMETER
PARAMETER PARAMETER
Sequential Cylinder Switch Time
Sequential Head Switch Time
Random Average (Read or Seek)
Random Average (Write)
Full-Stroke Seek
Average Rotational Latency
5
Power On to Drive Ready
7
Standby to Interface Ready
Spindown Time, Standby Command
Spindown Time, Power loss
1. Nominal conditions are as follows:
•Nominal temperature 77°F (25°C)
•Nominal supply voltages (12.0V, 5.0V)
•No applied shock or vibration
2. Worst case conditions are as follows:
•Worst case temperature extremes 41 to 131°F (5°C to 55°C)
•Worst case supply voltages (12.0V ±10%, 5.0 V ±5%)
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 (no more than
6% of cylinder switches exceed this time).
4. Sequential Head Switch Time is the time from the last sector of a track to the
beginning of the first logical sector of the next track of the same cylinder (no
more than 6% of head switches exceed this time).
5. Power On is the time from when the supply voltages reach operating range to
when the drive is ready to accept any command.
6. Drive Ready is the condition in which the disks are rotating at the rated speed,
and the drive is able to accept and execute commands requiring disk access
without further delay at power or start up. Error recovery routines may extend
the time to as long as 45 seconds for drive ready.
7. Standby is the condition at which the microprocessor is powered, but not the
HDA. When the host sends the drive a shutdown command, the drive parks the
heads away from the data zone, and spins down to a complete stop.
8. After this time it is safe to move the disk drive
9. Average random seek is defined as the average seek time between random
logical block addresses (LBAs).
4-4 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
Table 4-3

Table 4-3 Timing Specifications

Table 4-3 Table 4-3
NOMINAL NOMINAL NOMINAL NOMINAL
3
4
9
9
6
15.0 seconds
10.0 seconds
10.0 seconds
16.0 seconds
TYPICAL TYPICAL TYPICAL TYPICAL
1
0.8 ms
1 ms
8.5 ms
10.5 ms
17 ms
4.163 ms
WORST WORST WORST WORST
2
CASE CASE CASE CASE
1.2 ms
1.75 ms
12 ms
13 ms
24 ms
—
6
20.0 seconds
—
8
18.0 seconds
8
30.0 seconds