Manual Storage Mapping - HP ProLiant DL980 G7 Technical White Paper

Technical white paper | HP ProLiant DL980 G7 and P2000 G3 MSA Storage

Manual storage mapping

All Fast Track architectures require a Microsoft Multipath I/O (MPIO) manual mapping scheme. This manual mapping scheme
uses the "Fail over Only" MPIO policy for SAN connected storage. Each LUN has a primary and one or more secondary maps.
Since we are using redundant SAN switches for the Fast Track HA configurations, primary LUN mappings should be spread
out over the available SAN switches. Careful attention should be paid to ensure that LUNs are mapped using controller ports
and HBA ports that are physically connected to the same switch. This DL980 G7 reference architecture is unique in that
there are only 2 Data LUNs per array, rather than the usual 4. In order to provide the best performance, each Data LUN must
map through 2 storage ports rather than one. Table 10 below details a redundant manual mapping example for this DL980
G7 HA architecture.
Table 10. DL980 G7 Example HA manual cross-mapping scheme
LUN
Array #1
Data LUN #1
Data LUN #2
Log LUN #1
Cluster Root
Disk
Array #2
Data LUN #3
Data LUN #4
Log LUN #2
Cluster Quorum
Disk
Array #3
Data LUN #5
Data LUN #6
Log LUN #3
Array #4
Data LUN #7
Data LUN #8
Log LUN #4
Array #5
Data LUN #9
Data LUN #10
Log LUN #5
16
Primary Map
Port A1,A2; HBA 1 Port #1
Port B1,B2; HBA 2 Port #2
Port A1,A2; HBA 1 Port #1
Port B1,B2; HBA 1 Port #2
Port A1,A2; HBA 2 Port #1
Port B1,B2; HBA 1 Port #2
Port A1,A2; HBA 2 Port #1
Port B1,B2; HBA 2 Port #2
Port A1,A2; HBA 3 Port #1
Port B1,B2; HBA 4 Port #2
Port A1,A2; HBA 3 Port #1
Port A1,A2; HBA 4 Port #1
Port B1,B2; HBA 3 Port #2
Port A1,A2; HBA 4 Port #1
Port A1,A2; HBA 5 Port #1
Port B1,B2; HBA 11 Port #2
Port A1,A2; HBA 5 Port #1
Secondary Map
Port B1,B2; HBA 2 Port#2
Port A1,A2; HBA 1 Port#1
Port B1,B2; HBA 2 Port#2
Port A1,A2; HBA 2 Port#1
Port B1,B2; HBA 1 Port#2
Port A1,A2; HBA 2 Port#1
Port B1,B2; HBA 3 Port#2
Port A1,A2; HBA 3 Port#1
Port B1,B2; HBA 4 Port#2
Port A1,A2; HBA 3 Port#1
Port B1,B2; HBA 4 Port#2
Port B1,B2; HBA 3 Port#2
Port A1,A2; HBA 4 Port#1
Port B1,B2; HBA 3 Port#2
Port B1,B2; HBA 11 Port#2
Port A1,A2; HBA 5 Port#1
Port B1,B2; HBA 11 Port#2
Comment
In case of switch Loss, ½ of LUNs failover
to secondary map
Root disk holds only SQL and mount point
files.
Quorum disk does not house any files;
Cluster use only