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Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities

# service cman stop

A.9.5. Configure the shared storage array manually

If manual configuration of the storage array configuration is preferred instead of the using the script

“nssha61_single.py” mentioned in Section A.7.2, step 5 , please follow the instructions below.

1. Before configuring a shared storage array, please make sure service clvmd is running on both

servers, and make sure the step 7 in section A.7.1 is completed.

2. On one of the servers (in this example, “active”), create the physical volumes, volume group,

logical volume, and the file system.

Configure a 144TB storage array:

a. Obtain mpath names from the output of multipath –ll. All mpath names should exist in

/dev/mapper/.

b. Create physical volumes.

# pvcreate /dev/mapper/mpatha /dev/mapper/mpathb /dev/mapper/mpathc

/dev/mapper/mpathd

Note: different mpath names may be observed according to the actual configuration, please modify

them before executing pvcreate.

c. Create volume group.

For creating volume group, please pay attention to the order of physical volumes, making sure they

follow the order of LUN ids (from small to large). For example, if multipath –ll shows that

mpathd (36842b2b0004c256400000db74e95a1cb) dm-7 DELL,MD32xx

size=27T features='3 queue_if_no_path pg_init_retries 50' hwhandler='1

rdac' wp=rw

|-+- policy='round-robin 0' prio=6 status=active

| `- 2:0:0:2 sdm 8:192 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 1:0:0:2 sde 8:64 active ghost running

mpathc (36842b2b0004c21e00000072b4e95a6b0) dm-1 DELL,MD32xx

size=27T features='3 queue_if_no_path pg_init_retries 50' hwhandler='1

rdac' wp=rw

|-+- policy='round-robin 0' prio=6 status=active

| `- 1:0:0:3 sdf 8:80 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 2:0:0:3 sdn 8:208 active ghost running

mpathb (36842b2b0004c21e0000007284e95a64a) dm-3 DELL,MD32xx

size=27T features='3 queue_if_no_path pg_init_retries 50' hwhandler='1

rdac' wp=rw

|-+- policy='round-robin 0' prio=6 status=active

| `- 1:0:0:1 sdd 8:48 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 2:0:0:1 sdl 8:176 active ghost running

mpatha (36842b2b0004c256400000db24e95a162) dm-4 DELL,MD32xx