5 SAN switch 1
1 Network interconnection
6 SAN switch 2
2 Host 1
7 Controller A
3 Host 2
8 Controller
4 Management server
Linux (64-bit) configuration
Requirements
•
Switch zoning or controller level SSP must be used to ensure each single path HBA has an exclusive
path to its LUNs.
•
All nodes with direct connection to a disk must have the same access paths available to them.
•
Single path HBA server can be in the same fabric as servers with multiple HBAs.
•
In the use of snapshots and snapclones, the source virtual disk and all associated snapshots and
snapclones must be presented to the single path hosts that are zoned with the same controller. In
the case of snapclones, after the cloning process has completed and the clone becomes an ordinary
virtual disk, you may present that virtual disk as you would any other ordinary virtual disk.
•
Linux 64-bit servers can support up to14 single or dual path HBAs per server. Switch zoning and
SSP are required to isolate the LUNs presented to each HBA from each other.
HBA configuration
•
Host 1 and 2 are single path HBA hosts.
•
Host 3 is a dual HBA host with multi-pathing software.
See
Figure 40
.
Risks
•
Single path failure may result in data loss or disk corruption.
NOTE:
For additional risks, see
Table 32
on page 126.
Limitations
•
HP Continuous Access EVA is not supported with single path configurations.
•
Single path HBA server is not part of a cluster.
•
Booting from the SAN is supported on single path HBA servers.
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