HP Surestore NAS - Manual (Page 17)

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Using the HP NAS VA
Getting Started - Part 1
This section is a summary of how to get started with your HP NAS VA Storage system. For more
details please see the following sections of this manual:
o Planning Your Storage
o Getting Started - Part 2
Recommendation
Use Quick Setup if you want up to 256 GB of storage configured quickly on your VA 7100, 512
GB on your VA 7400. Quick Setup will create a single Volume Group and a single LUN on the
VA 7100, one Volume Group with 2 LUNs on your VA7400. You can then create multiple Logical
Volumes onto that Volume Group with Quick Setup.
Quick Setup should only be used 1 time, thereafter you need to use Advanced Setup for your
storage configurations.
Use Advanced Setup for creating multiple Volume Groups and Logical Volumes, or Volume
Groups and Logical Volumes of different sizes. Use Advanced Setup either from the start, or to
manage your storage after one usage of Quick Setup. Advanced Setup can be used to expand
the size of the Volume Group created with Quick Setup.
Understanding NAS VA Storage Terminology
NAS VA storage progression: LUN (device) > Volume Group > Logical Volume > mount
point/share
LUN (device) – A “device” or LUN is a group of storage (i.e. “blocks”) striped across ALL disks in
the Array (behavior unique to HP’s Auto Raid). An array must have at least one LUN and can
have as many as hundreds of LUNs. HPUX naming conventions refer to LUNs as devices; we
attempt to use LUN throughout this document.
Volume Group (VG) – the next level of grouping storage. VGs are made up of one or more
entire LUNs. By design, it is not possible for a single LUN to be a member of more than one VG.
VGs can contain LUNs from multiple arrays connected to the NAS head via multiple FC-HBAs or
FC hubs or switches. This is usually done to distribute the data load across more disks to
increase performance.
Logical Volume (LV) – a “slice” of the grouped storage (i.e. VG). The LV can be very small or
use all of the space available in a single VG, but it cannot span VGs. CIFS shares (for Microsoft
based OSs) and NFS mount points (for UNIX based OSs) provide access to the available storage
in a LV.