HP 6100 HP 4x00/6x00/8x00 Enterprise Virtual Array User Guide (5697-0733, Marc - Page 160
Risks, Limitations, Linux (64-bit) configuration, Requirements, HBA configuration
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Risks • Single path failure may result in data loss or disk corruption. NOTE: For additional risks, see Table 61 (page 165). 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. Figure 56 Linux (32-bit) configuration 1 Network interconnection 2 Host 1 3 Host 2 4 Management server 5 SAN switch 1 6 SAN switch 2 7 Controller A 8 Controller 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 57 (page 161). 160 Single Path Implementation