Fujitsu PRIMERGY User Manual page 34

When you install two or more SCSI cards in a SERVER, each SCSI card creates a
separate SCSI bus. Device SCSI ID numbers can be duplicated if they are used on
separate SCSI buses. For example, you can connect two SCSI devices, both having a
SCSI ID of 0, by connecting one SCSI device to one SCSI bus, and the other SCSI
device to the other SCSI bus.
SCSI terminators and cables
To ensure reliable communication, it is important to use high-quality cables and
terminators (called terminating resistors). Enable the terminator on the SCSI device
on each end of the SCSI bus, and disable the terminators on all the SCSI devices in
between.
I
This card termination
This card terminator is set using the SCSISelect utility. The default setting is
｢Automatic｣, which sets termination automatically. We recommend that you leave
the terminator set to the default ｢Automatic｣ setting.
ISCSI device termination
To determine whether to terminate SCSI devices, refer to that SCSI device's
documentation.
ISCSI cables
Since the cables that connect the SCSI devices are important components in ensuring
stable operation, be sure to use Fujitsu products.
4
Note
In order to supply the power to the SCSI terminators of this card to hold them
activated always, be sure to leave both the jumpers J2 and J4 of this card in their
respective default settings (short-circuited).
Note
All the SCSI terminators of this card are always activated because the
jumpers J2 and J4 of this card are held short-circuited (default setting).
Note
When connecting two or more SCSI devices to this card, ensure reliable
operation by limiting the combined total length of SCSI cables to a maximum
of 25 meters.