Thecus Technology i Series - Manual (Page 32)

The above diagram describes the relationship of RAID components. 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.
Each UDV will be associated with one specific CV (Cache Volume) to execute
the data transaction. Each CV could have different cache memory size from
user’s modification/setting. LUN is the logical volume/unit, which the users could
access through SCSI commands.
3.6.2 Physical disk
Enter “Physical disk” to view the status of hard drives inserted in the system.
The following are operation tips:
1. Multiple select. Select one or more checkboxes in front of the slot
number. Or select the checkbox at the top left corner will select all.
Check again will select none.
2. The list box will disappear if there is no VG or only VG of RAID 0,
JBOD. Because these RAID levels cannot be set as dedicated spare
disk.
3. These three functions “Free disks”, “Global spares”, “Dedicated
spares” can do multiple selects, too.
4. The operations of the other web pages (e.g.: volume config of VG, UDV,
CV, LUN pages) are similar to previous steps.
Figure 3.6.2.1
(Figure 3.6.2.1: Physical disks of slot 1,2 are created for a VG named “VG-R0”. Physical
disks of slot 3,4,5 are created for a VG named “VG-R5”.)
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