Installation Considerations; Minimum Hardware - Sun Microsystems StorEdge MultiPack Series User Manual

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C H A P T E R

Installation Considerations

Minimum Hardware

The Sun StorEdge MultiPack storage enclosure runs at Fast or UltraSCSI (Fast20)
speeds with a small computer system interface (SCSI) host connection. The
UltraSCSI label on the front and on the removable door of the MultiPack indicates
UltraSCSI capability.
Note – For UltraSCSI functionality, the host or host adapter to which you connect
your Sun StorEdge MultiPack unit must be capable of UltraSCSI speeds. You can
connect a Sun StorEdge MultiPack enclosure to a fast wide or narrow SCSI-capable
host adapter, but in such a case, the Sun StorEdge MultiPack unit performs at the
lower speed.
Only one Sun StorEdge MultiPack enclosure loaded with up to six disk drives can be
connected on each bus for UltraSCSI operation.
The number of UltraSCSI host adapters you can install is limited only by the number
of slots available on your computer. Each wide or UltraSCSI host adapter you add
increases the number of SCSI devices you can connect to your computer by 15
addresses.
A computer with a narrow (50-pin connector) SCSI bus has only seven SCSI
addresses available for internal or external devices. To use devices using SCSI
addresses 8 through 15, you must have a computer equipped with a wide SCSI bus
(68-pin connector) or a wide SCSI adapter card.
For Fast speeds, use a Sun supplied terminator for the OUT port of the Sun StorEdge
MultiPack enclosure. For UltraSCSI speeds, do not use a terminator.
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