Filter
Top Products
Specifications
Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT 4-5
Table 4-3 illustrates the timing specifications of the Maxtor D540X-4K hard disk
drives.
Timing Specifications
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°F 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.
Sequential Cylinder Switch Time 2 ms 3 ms
Sequential Head Switch Time
2 ms 3 ms
Random Average (Read or Seek)
12 ms 15 ms
Random Average (Write)
15 ms 18 ms
Full-Stroke Seek 24 ms 28 ms
Average Rotational Latency 5.56 ms —
Power On
to Drive Ready 7.5 seconds 12 seconds
Standby
to Interface Ready 6 seconds 12 seconds
Spindown Time, Standby Com-
mand
6 seconds 15 seconds
Spindown Time, Power loss 12 seconds 30 seconds