4
UnsharedDirect and Shared-or-Clustered Direct Storage
4-3
Planning LUNs and File Systems with Unshared Direct Storage

The storage system disk IDs and LUNs are as follows. The LUN

capacities shown assume 36-Gbyte disks.

Sample Shared-or-Clustered Direct Installation
Figure4-2 Sample Clustered Installation

If each disk holds 36 Gbytes, then the storage-system chassis provides

Server 1 with 256 Gbytes of disk storage, 220 Gbytes highly available;

it provides Server 2 with 216 Gbytes of storage, all highly available.

Each server has its own SP, which controls that server’s LUNs; those

LUNs remain primary to that server. The LUNs are as follows.

LUNs - SP A and SP B, 422 Gbytes
Disk IDs RAID type, storage type, capacity
0_0, 0_1 RAID 1, System disk, 36 Gbytes
0_2-0_9 RAID 5 (8 disks), Cl ients and Mail, 216 Gbytes
1_0-1_4 RAID 5, Database, 144 Gbytes
1_5 Disk, Temporary storage, 36 Gbytes
Path 2
Path 1
Server 2 (S2)
Server 1 (S1)
Storage
system
S1Mail
RAID1
S2 Customers
RAID 5
S1Dbase
RAID 5
Unused
Spare
S2 Usri
RAID1

SP A SP B

Adapter
Adapter
Adapter
Adapter
Server1 LUNs (S1) - SP A, 256 Gbytes Server2 LUNs (S2) - SP B, 216 Gbytes
Disk IDs RAID type, storage type, capacity
0_0, 0_1 RAID 1, System disk, 36 Gbytes
0_2 Disk,Temporary storage, 36 Gbytes
0_3-0_7 RAID 5, Database, 144 Gbytes
0_8-0_ 9 RAID 1, Users, 36 Gbytes
Disk IDs RAID type, storage type, capacity
1_0-1_7 RAID 5 (8 disks), Cust Accounts, 216
Gbytes