APC RAID Subsystem SCSI-SATA II User Manual download pdf (Page 105)

SAS / SATA II NAS System

User’s Manual

105

8.1 Volume Manager

The Volume Manager is responsible for disk and volume management.

A Volume Group consists of one or more disks that could be individual physical disk(s) or

RAID disk(s), which is/are Volume(s) created using proRAID Manager. The default

proNAS Volume Group (proNASVG) must be created first by joining at least one “New” or

“Non_Initialized” disk to this volume group. The proNASVG holds the NAS system

configuration and the default system Logical Volumes, such as home, public, proBackup

Device, and proBackup Extended Device, as well as user-defined Logical Volumes. Files

and folders reside on these Logical Volumes.

The default proNASVG Volume Group cannot be deleted. When proNASVG is created, the

XFS file system is set in each default Logical Volume. XFS file system is also set in all

user-defined Logical Volumes. XFS is a high performance journaling file system and

provides better recovery time to repair a file system in case of FS damage. The proNAS

Volume Group will dynamically allocate some space from its assigned disks, and

allocation may fail if no more disk space is available. Therefore, make sure to regularly

monitor the available free space of proNAS Volume Group.

The Volume Manager can perform the following function:

 Create a VG (volume group)

 Join New Disks

 Reset a VG (volume group)

 Remove a VG (volume group)

 Create Logical Volume

 Create Snapshot

 Create Replication

 Create iSCSI Target LUN

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APC RAID Subsystem SCSI-SATA II User Manual Page 105