Timing Specifications; Power - Maxtor D740X-6L 20.0 AT Product Manual

Hard disk drives

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Table Of Contents

Table of Contents

S p e c i f i c a t i o n s

6 + / + 0 ) 5 2 ' % + ( + % # 6 + 1 0 5

Table 4-3 illustrates the timing specifications of the Maxtor D740X-6L hard disk

drives.

2 # 4 # / ' 6 ' 4

Sequential Cylinder Switch Time

Sequential Head Switch Time

Random Average (Read or Seek)

Random Average (Write)

Full-Stroke Seek

Average Rotational Latency

Power On

to Drive Ready

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%, 5.0V ±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

4 - 4 M a x t o r D 7 4 0 X - 6 L 2 0 . 0 / 4 0 . 0 / 6 0 . 0 / 8 0 . 0 G B A T

6 C D N G

0 1 / + 0 # .

0.8ms

1ms

8.5ms

10.5ms

17.8ms

4.163ms

12.5 seconds

10.0 seconds

19.0 seconds

20.0 seconds