HP StorageWorks U320e SCSI Host Bus Adapter user guide (AH627-96001, March 2007)

WARNING!
When installing the adapter in a server in a rack, to reduce the risk of p ersonal injur y or damage to the
equipment, adequately stabilize the rack before extending a component outside the rack. Extend only
one component at a time. A rack may become unstable if more than one component is extended.
The installation procedure involves the following steps:
1. Planning the installation (see page 14)
2.
Preparing the server (see page 16)
3. Installing the adapter hardware (see page 17)
4. Connecting the devices (see page 17)
5.
Validating the SCSI bus (see page 19)
Planning the installation
To minimize system downtime, plan the installation before powering off the server:
1. Plan the SCSI busses.
The adapter has two channels. When planning your SCSI b usses, keep the following in mind:
• Total bus cable length varies by the type of attached devices. See Table 2 for details on maximum
cable length. See the documentation for your d evices to find the cable leng th inside the device.
Table 2 SCSI capabilities
Max.buslengthinmeters
SCSI standard Bus speed
MB/sec. max.
Bus width bits
Single-ended
LVD
Max. device
support
1
SCSI-1
5
86
—
8
Fast SCSI 10 8 3
—
8
Fast Wide SCSI
20 16 3
—
16
Wide Ultra/WIDE
SCSI
40
16
1.5
—
8
Wide Ultra/WIDE
SCSI
40
16 3
—
4
Ultra2 SCSI
80 16
—
12 16
Ultra160 SCSI
160 16
—
12 16
Ultra320 SCSI
320 16
—
12 16
1
Including the HBA.
• Ifyoucombinewide16-bitandnarrow8-bitdevicesonthesameSCSIbus,connectthewide
devices first (closest to the connector).
• Refer to the documentation for your SCSI devices to determine whether they are Ultra2, Ultra160,
or Ultra32 0 SCSI.
NOTE:
HP recommends not mixing Single-Ended and LVD devices on the same bus because the host adapter
card will operate with Single-Ended signaling at UltraSCSI speeds, which will significantly decrease the
speedofhigh-performancetapedrives.
2. Plan the SCSI device termination.
14
Installation