Physical Dimensions; Seek Time; Start And Stop Times - Seagate Medalist 1640 Product Manual

Medalist 1640 and 2140 Product Manual, January 1996

1.4 Physical dimensions

The mounting dimensions are shown in Figure 6 on page 24.
Height, max
Width, max
Depth, max
Weight

1.5 Seek time

Seek time is the interval between the time the actuator begins to move
and the time the head is over the target track. Seek time is a true statistical
average of at least 10,000 measurements of seek time. All measure-
ments for maximum values are taken under nominal conditions of
temperature and voltage with the drive mounted horizontally. The speci-
fications in the table below are defined as follows:
• Track-to-track seek time is the average of all possible single-track
seeks in both directions.
• Average seek time is measured by executing seeks in both directions
between random cylinders.
• Full-stroke seek time is half the time needed to seek from track 0 to
the maximum track and back to track 0.
Track-to-track Average/typical
seek time
2.0 msec typ
Note. Host overhead varies between systems and cannot be specified.
Drive internal overhead is measured by issuing a no-motion seek.
Overhead is typically less than 1.0 msec.

1.6 Start and stop times

The drive is ready within 8 seconds after the power is applied. The drive
spindle stops rotating within 7 seconds typical after the power is removed.
6. When measured on a 66 MHz, 486DX AT computer with an 8.33 MHz I/O Bus while
executing PC Labs or Core test with Smartdrive.
1.027 inches (26.1 mm)
4.023 inches (102.2 mm)
5.787 inches (147.0 mm)
1.0 lb (453.6 g)
Full-stroke
seek time seek time
6
10.0 msec 20.0 msec typ
7
Average
latency
5.58 msec