WiebeTech LLC
R T X - U R U s e r ’ s M a n u a l
- 18 -
The following diagram explains the architecture of RAID using RTX-UR and the relationship between
physical disks (PDs), volume groups (VGs), user data volumes (UDVs), and logical unit numbers (LUNs).
One VG (Volume Group) consists of a set of UDVs (User Data Volume) and owns one RAID level
attribute. Each VG can be divided into several UDVs. The UDVs from one VG share the same RAID
level, but may have different volume capacity. If multiple UDVs are created, they will mount on your
computer as separate partitions. Each UDV will be associated with one specific CV (Cache Volume) to
execute data transfers. Each CV could have different cache memory size as defined or configured by
user. LUN is a SCSI protocol that the computer uses to distinguish and access SCSI devices.
5.5.1 Physical Disk
Click the Physical Disk option to view and modify the status of the drives installed in the RTX-UR.
The following information is displayed:
•
Checkboxes: Click the checkbox of any disk or disks, then click Free disks, Global spares, or
Dedicated spares to set the selected drive(s) to that status. Click the top checkbox to select all
drives.
•
Slot: The slot number of the hard drive. 1 corresponds to the top bay of the RTX-UR. Click the
button below the slot number to display more information about that particular hard drive.
•
WWN: The World Wide Name of the hard drive, an identification code unique to each hard drive.
•
Size (GB): The logical capacity of the drive.
•
VG (name): The Volume group the drive is assigned to, if any.
