.Part 3 Host and Storage System Rules HP SAN Design Reference Guide 785353-001

Table 83 (page 182) describes storage system configuration rules for NonStop servers.
Table 83 NonStop server configuration rules
Description
Rule
number
Requires a minimum of one XP storage system for storage connectivity.1
Requires a minimum of one IOAME on the server. For the NS1000, NS1200, NS14000, and NS14200
servers using VIO, two VIO enclosures are used instead of the IOAME. For BladeSystems using CLIMs,
two CLIMs are used instead of the IOAME.
2
Requires a minimum of two FCSAs in an IOAME, as shown in Figure 65 (page 184), Figure 68 (page 185),
Figure 71 (page 187), and Figure 74 (page 188). Each FCSA has two Fibre Channel ports.
3
Servers using VIO require one embedded 4-port Fibre Channel PIC per VIO enclosure (total of two PICs
per server) for basic connectivity, as shown in Figure 66 (page 184) and Figure 69 (page 186). Logical
4
and physical redundancy of the storage system, as shown in Figure 72 (page 187) and Figure 75 (page
189), requires the addition of one expansion 4-port Fibre Channel PIC per VIO enclosure (total of two
expansion PICs per server).
For optimal I/O performance, use a separate I/O path for each logical disk volumes.
The following restrictions apply to CLIMs:5
• The maximum number of LUNs for each CLIM, (including SAS disks, XP disk arrays, and tapes) is 512.
Each primary, backup, mirror, and mirror backup path is counted.
• The XP LUN range for each port is 0 to 499.
• The maximum number of XP ports for each CLIM is four.
• The maximum number of mirrored XP volumes is 256 with two CLIMs, and 512 with four CLIMs.
Each LDEV requires two LUNs.6
No boot support.7
Contact HP support for host mode requirements on storage system ports.8
For more information on supported B-series and C-series switches, contact HP support.9
Each fabric must contain switches of the same series only—switches from multiple series within a fabric
is not supported.
10
Slot 1 of the VIO enclosure contains a 4-port Fibre Channel PIC, which provides FCSA functionality of
the IOAME systems. You can double the number of Fibre Channel ports on a server (from 8 to 16) by
11
adding a 4-port Fibre Channel PIC in slot 7c of each VIO enclosure. This requires the installation of an
expansion board in slot 7b of each VIO enclosure. FCDM or ESS connections can make use of these
expanded Fibre Channel ports.
Note: For NS1000 and NS1200 servers, expanded ports are available only to customers who have the
HP ESS.
The VIO enclosure software is not backward compatible. This product is supported only on H06.08 and
later RVUs.
12
The CLIM software is not backward compatible. This product is supported only on J06.04 and later RVUs.13
Direct host attach14
• HP recommends host-based mirroring. For example, each LDEV (P) is mirrored to a separate LDEV (M)
on separate XP ports (p, b, m, mb paths are used). A nonmirrored volume is allowed. For example,
each LDEV (P) is not mirrored to a separate LDEV (M) on separate XP ports (only p and b paths are
used).
• For high availability, the primary (P) LDEVs and mirror (M) LDEVs must be configured on separate
array ACP pairs.
• For high availability, the p and b paths must be in separate XP array clusters. The m and mb paths
must be in separate array clusters. The p and m paths must be in separate XP array clusters.
• The 2 Gb FCSAs (IOAME) are supported with 1 Gb/2 Gb CHIPs for XP 10000/12000/20000/24000
and with 4 Gb CHIPs for XP10000/12000/20000/24000.
182 Heterogeneous server rules