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status on this page. This is the only page that contains information about the state of the
drives in the RAID. The Slots menu only indicates the physical health of the hard drives.
2.4 LUN Creation
Logical Unit Numbers are logical storage used as the building blocks of a RAID set. A LUN
is a logical unit of the total storage that is used for determining how the disk space will be
accessed; ie: as two disks, as a data and metadata disk, etc. In order to successfully use
the RAID from attached clients and other devices at least one LUN is required. HyperFS
Shared File System requires a minimum of two LUNs, a Metadata and Data LUN.
The Name, Size, and Offset fields on this page should be filled out first before clicking the
Create button to create the LUN. The LUN Name is a user-‐defined name for identifying
the LUN between systems. The Size is the total size in GB of the LUN and the Offset must
be filled in when creating multiple LUNs where each LUN capacity has a value to be offset
by the total of preceding LUNs. The following is an example of multiple LUNs from a sin-‐
gle RAID set.
Total RAID Size: 4000GB
LUN 1 SIZE: 2000 OFFSET: 0
LUN 2 SIZE: 2000 OFFSET: 2000
LUN 3 SIZE: 2000 OFFSET: 4000
LUN 4 SIZE: 2000 OFFSET: 6000
HyperFS Shared File System requires a Metadata and a Data LUN for each of its volumes.
The Metadata LUN is used to manage various file management processes. A 120GB
Metadata LUN size should be large enough for the QOS 8-‐Bay system to work with Hy-‐
perFS, and the rest of the available drive space can go towards a single Data LUN (with an
offset value of 120GB).
QOS 8-Bay User Manual
QOS Server is a subsidary of Ocean Tides Productions Ltd. © Copyright 2013
