Owner's Manual

62 Configuring Database Storage on the Host

Adjusting Disk Partitions for Systems Running the

Linux Operating System

CAUTION: In a system running the Linux operating system, align the partition

table before data is written to the LUN/virtual disk. The partition map is rewritten

and all data on the LUN/virtual disk destroyed.

Example: fdisk Utility Arguments

The following example indicates the arguments for the

fdisk

utility. In this

example, the LUN is mapped to

/dev/emcpowera

, and the LUN stripe element

size is of 128 blocks.

NOTE: In this example, the disk /dev/emcpowera already has a primary partition

/dev/emcpowera1 created. In the case of the PowerVault MD3000, MD3000i,

EqualLogic storage array, the process is performed on /dev/sdb1.

fdisk /dev/emcpowera

NOTE: Create a partition on /dev/emcpowera before performing the following

steps.

x # expert mode

b # adjust starting block number

1 # choose partition 1

128 # set it to 128, (This is the default stripe element size on the

Dell/EMC CX series Fibre Channel storage)

w # write the new partition

The fdisk method is preferable to the LUN alignment offset method for

LUNs that have a snapshot, clone, or MirrorView image made of them. It is

also preferred for SAN copy sources and targets.