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Technical data

ManualsBrandsCompaq ManualsHome building and DecorStorageWorks TM RAID Array 3000 Pedestal Storage Subsystem
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• Be careful when performing maintenance on any device that is on a
shared bus because of the constant activity on the bus. Usually, to
perform maintenance on a device without shutting down the cluster, you
must be able to isolate the device from the shared bus without affecting
bus termination.
• All supported UltraSCSI host adapters support UltraSCSI disks at
UltraSCSI speeds in UltraSCSI BA356 shelves, RA7000 or ESA10000
storage arrays (HSZ70 and HSZ80), RA8000 or ESA12000 storage arrays
(HSZ80 and HSG80), or the RAID Array 3000 (RA3000, with HSZ22
controller). Older, non-UltraSCSI BA356 shelves are supported with
UltraSCSI host adapters and host RAID controllers as long as they
contain no UltraSCSI disks.
_____________________ Note _____________________
The RA3000 is supported only with the KZPBA-CB UltraSCSI
host bus adapter.
• UltraSCSI drives and fast wide drives can be mixed together in an
UltraSCSI BA356 shelf. (See Chapter 10.)
• Differential UltraSCSI adapters may be connected to either (or both)
a non-UltraSCSI BA356 shelf (via a DWZZB-VW) and the UltraSCSI
BA356 shelf (via the DS-BA35X-DA personality module) on the same
shared SCSI bus. The UltraSCSI adapter negotiates maximum transfer
speeds with each SCSI device. (See Chapter 10.)
• The HSZ70 and HSZ80 UltraSCSI RAID controllers have a wide
differential UltraSCSI host bus with a Very High Density Cable
Interconnect (VHDCI) connector. HSZ70 and HSZ80 controllers will
work with fast and wide differential SCSI adapters (for example,
KZPSA-BB) at fast SCSI speeds.
• Fast, wide SCSI drives (green StorageWorks building blocks (SBBs) with
part numbers ending in -VW) may be used in an UltraSCSI BA356 shelf.
• Do not use fast, narrow SCSI drives (green SBBs with part numbers
ending in -VA) in any shelf that can assign the drive a SCSI ID greater
than 7. They will not work.
• The UltraSCSI BA356 requires a 180-watt power supply (BA35X-HH).
It will not function properly with the older, lower-wattage BA35X-HF
universal 150-watt power supply. (See Chapter 10.)
• An older BA356 that has been retrofitted with a BA35X-HH 180-watt
power supply and DS-BA35X-DA personality module is still only FCC
certified for Fast 10 configurations. (See Chapter 10.)
Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware 3–3