FUJITSU MPA3043AT - Manual (Page 27)

C141-E034-02EN 2 - 5
2.2.3 2 drives connection
ATA interface
AT bus
(Host interface)
Disk drive #1
Disk drive #0
HA
(Host adaptor)
Host
Note:
When the drive that is not conformed to ATA is connected to the disk drive is above
configuration, the operation is not guaranteed.
Figure 2.4 2 drives configuration
IMPORTANT
HA (host adapter) consists of address decoder, driver, and receiver.
ATA is an abbreviation of "AT attachment". The disk drive is
conformed to the ATA-3 interface.
At high speed data transfer (PIO mode 3, mode 4, DMA mode 2 or
ultra DMA mode), occurrence of ringing or crosstalk of the signal lines
(AT bus) between the HA and the disk drive may be a great cause of the
obstruction of system reliability. Thus, it is necessary that the
capacitance of the signal lines including the HA and cable does not
exceed the ATA-3 and ATA-4 standard, and the cable length between
the HA and the disk drive should be as short as possible.