NEC Express5800/120Rd-2, Service Manual

Page: 291 / 362

Disassembly and Reassembly 7-47
Installing a Disk Array Controller Board
See "PCI Board" for the installation of a disk array controller.
IMPORTANT:
!
A riser card is designed for installing only low-profile PCI boards or
full-height PCI boards. Before installing a PCI board, make sure of the
card specification.
!
If the AcceleRAID 160 disk array controller is installed on the riser
card of the low-profile type, the internal hard disk drives cannot be
used in a disk array configuration. (Attach the provided bracket to the
disk array controller, and install the controller on the riser card of the
full-height type.)
!
If a PCI board is installed in a slot lower than the one containing the
AcceleRAID 160 disk array controller, the LED connector on the disk
array controller board cannot be connected to the DAC LED
connector on the system board. (The disk access lamps on the front of
the server cannot indicate the status of access to the hard disk drives
connected with the disk array controller.)
!
The PCI bus slot search order at start of the server is defined as
follows:
– Low-profile riser card, and then the full-height riser card
– Ascending order of the slot numbers
Thus, the system searches for the slot numbers in the following order:
1C
→
2C
→
3C
→
1B
→
2B
→
3B
A SCSI controller (including a disk array controller) with the system
disk connected must be searched for before any other SCSI
controllers. Determine the slot in which the SCSI controller is first
searched for. The system is unable to start if the SCSI controller
search order is wrong.
!
To switch the internal hard disk drives into a disk array configuration
by connecting a disk array controller to the full-height riser card,
connect the cable before installing the riser card on the system board.
!
If a disk array controller is installed on both the low-profile riser card
and the full-height riser card, the system is unable to start through a
disk that is connected to the disk array controller installed on the full-
height riser card.
!
When connecting a disk array controller, start the BIOS SETUP
utility, select [Boot]
→
[Hard Disk Drives], and set the 8th priority or
earlier for the controller. If the 9th priority or later is set, the system is
unable to start the disk array controller configuration menu.