Product Description
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Topologies
The disk system supports high availability through redundant components and
redundant connections to redundant hosts. Each SCSI port on a BCC can be
connected to a different host bus adapter in the same or different hosts. Internal
mirroring within the disk system is also possible.
Basic high availability topologies are described on the following pages. For
information about specific supported topologies, consult an HP sales
representative.
This disk system can hold up to 14 disk modules. The maximum number of disk
modules can be installed in either Full Bus Mode or Split Bus Mode. However,
host and disk drive addressing must be closely managed.
Full Bus Mode
The maximum of 14 disk modules can be supported in Full Bus Mode provided
there there is only one host bus adapter (HBA) connection and the HBA has the
SCSI address of 7.
If more than one host connection is required, the slot with the SCSI address
corresponding to the SCSI address of the additional host must not have a disk
module installed in it to avoid bus contention. For example, if two connections
are made to a Disk System 2300 with HBAs having SCSI addresses of 6 and 7,
then SCSI ID 6 (slot 7)must not have a disk module installed in it.
Note
SCSI address 15 should never be used by an HBA when
connecting to a Disk System 2300 because this address is reserved
on the SCSI bus for the enclosure services microprocessor.
Connecting one disk system to redundant hosts achieves system level high
availability. A single host bus adapter in each host is connected to a different port
in the disk system. With the disk system in full bus mode (switch 1 on), each host
can reach all the disks. If the right BCC (viewed from the rear of the disk system)
fails in this topology, there is still one path to the disks through BCC B. With the
disk system in split bus mode (two internal busses), the Disk System 2300
supports data mirroring between the two internal busses within the same disk
system. All connections from the host to the disk system are SCSI LVD cables.
Содержание StorageWorks 2300 - Disk System
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Страница 59: ...Installation 59 Installation 4 Install clipnuts as shown in Figure 28 ...
Страница 62: ...62 Installation 9 Tightenthe storagedeviceretention M5 screwsthrough the retention bracket see Figure 31 ...
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Страница 150: ...150 Reference E VCCI Statement Japan Harmonics Conformance Japan F BCIQ EMC Statement Taiwan ...
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