PP 110/01x
4-1
Mass Storage Interfaces
The PP 110/01x board has two interfaces which can be used to attach mass storage devices:
l
a Primary EIDE (ATA100) interface is accessible via the CompactPCI J5 connector
l
a Secondary EIDE (ATA100) interface supporting on-board Mass Storage option kits
In addition, the AD PP5/001 Transition Module provides a floppy disk interface. SCSI may be
provided by fitting PMC SCSI modules.
The order in which the PC BIOS firmware tries to bootload from these drives can be changed via
the BIOS Setup screen for
Boot
.
4.1
EIDE Interfaces
The board supports two EIDE (ATA100) interfaces.
The Primary EIDE interface connects via the CompactPCI J5 connector of the PP 110/01x
board, or through the Transition Module. Up to two EIDE peripherals may be connected to this
interface. The BIOS Setup screens, for
Main | Primary Master
and
Main | Primary
Slave
allow the user to see what is connected to this interface, and to select some
characteristics of the drives manually. Normally the PC BIOS firmware will automatically
determine the drive characteristics from the drives themselves.
The Secondary EIDE interface connects only to the optional Hard Disk or CompactFlash Storage
Kits. The Hard Disk kit will appear as the Secondary Master drive, and the CompactFlash cards
on the CompactFlash kit will appear as the Secondary Master and Secondary Slave drives. The
BIOS Setup screens for
Main | Secondary Master
and
Main | Secondary Slave
allow
the user to see what is connected to this interface, and to select some characteristics of the
drives manually.
Note that when using faster EIDE drives the overall cable length from the PP 110/01x board to
the drive furthest from the board must be kept as low as possible, and in any case no more than
18 inches or 450 mm. If this is not practical, it may be necessary to reduce the interface
performance using the
UltraDMA Mode
and
Transfer Mode
fields of the BIOS Setup screens
indicated above.
To achieve the faster speeds (above ATA33) via the Primary EIDE Interface it will also be
necessary to use the correct (80-way) type of EIDE cable, and to manually select the
User
configuration and
UDMA 4
or
UDMA 5
speeds for the drive using the BIOS Setup screens for
Main|Primary Master
and
Main|Primary Slave
as appropriate. Selection of the fastest
speed for the Secondary (on-board) EIDE interface is automatic.
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