Glossary
GL-2
C141-E070-01EN
MTBF
Mean time between failures. The MTBF is calculated by dividing the total
operation time (total power-on time) by the number of failures in the disk drive
during operation.
MTTR
Mean time to repair. The MTTR is the average time required for a service person
to diagnose and repair a faulty drive.
PIO (Programmed input-output)
Mode to transfer data under control of the host CPU
Positioning
Sum of the seek time and mean rotational delay
Power save mode
The power save modes are idle mode, standby mode, and sleep mode.
In idle mode, the drive is neither reading, writing, nor seeking data. In standby
mode, the spindle motor is stopped and circuits other than the interface control
circuit are sleeping. The drive enters sleep mode when the host issues the SLEEP
command.
Reserved
Reserved bits, bytes, and fields are set to zero and unusable because they are
reserved for future standards.
Rotational delay
Time delay due to disk rotation. The mean delay is the time required for half a
disk rotation. The mean delay is the average time required for a head to reach a
sector after the head is positioned on a track.
Seek time
The seek time is the time required for a head to move from the current track to
another track. The seek time does not include the mean rotational delay.
Slave (Device 1)
The slave is a second drive that can operate on the AT bus. The slave is daisy-
chained with the first drive operating in conformity with the ATA standard.
Summary of Contents for MHG2102AT - Mobile 10 GB Hard Drive
Page 1: ...C141 E070 02EN MHG2102AT MHH2064AT MHH2048AT MHH2032AT DISK DRIVES PRODUCT MANUAL ...
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Page 40: ...3 1 Dimensions C141 E070 01EN 3 3 Figure 3 1 Dimensions MHH series 2 2 ...
Page 51: ...Installation Conditions 3 14 C141 E070 02EN Figure 3 15 Example 2 of Cable Select ...
Page 56: ...4 3 Circuit Configuration C141 E070 01EN 4 5 Figure 4 2 Circuit Configuration 16 bit ...
Page 62: ...4 6 Read write Circuit C141 E070 01EN 4 11 Figure 4 4 Read write circuit block diagram ...
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Page 169: ...Interface 5 96 C141 E070 01EN Figure 5 10 Data transfer timing ...
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