HP XP Array Manager Software - Manual (Page 97)

Related topics
• Creating a storage operating environment , page 95
• Creating volumes , page 97
• Notes on performing quick formats , page 97
• Create Volumes dialog box , page 98
• About deleting unallocated volumes , page 102
Notes on performing quick formats
A quick format might impose a heavy workload on some components and lower I/O performance
of all hosts running in the target storage system.
We recommend running a quick format when system activity is low and major system operations are
not running.
We also recommend running a quick format on a maximum of eight volumes at first, and then
confirming that the quick format has not lowered host I/O performance. After that, when you perform
a quick format on other volumes, we recommend increasing the number of volumes to be formatted
in increments of four.
In particular, if the storage system components are configured as follows, the host I/O performance
is likely to be lowered when a quick format is performed:
• Components such as cache memory, CHAs (channel adapters), and DKAs (disk adapters) are in
the minimum configuration.
• The number of installed components is extremely different among DKCs (controller chassis) or
modules within a single storage system.
In these configurations, run a quick format on only one volume at first, review the host I/O performance,
and then continue to run a quick format on other volumes one by one.
Related topics
• About creating volumes , page 96
• Creating volumes , page 97
• Create Volumes dialog box , page 98
• Allocate Volumes dialog box , page 146
Creating volumes
For registered storage systems, volumes are created so they can be allocated to hosts.
Prerequisites
• Identify the storage system
• Identify the number of volumes to create
• Identify volume types and capacities
User Guide 97