APC SCSI-SATA II manual Terminology, Raid Pd Vg Udv Cv Lun Gui

Models: SCSI-SATA II

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1.2 Terminology

exceed the highest industry standards, and the best data solution for small/medium business users.

Caution

Snapshot/rollback features need 512MB RAM or more. Please refer to RAM certification list in Appendix A for more detail.

1.2 Terminology

The document uses the following terms:

RAID

PD

VG

UDV

CV

LUN

GUI

RAID is the abbreviation of “Redundant Array of Independent Disks. There are different RAID levels with different degree of the data protection, data availability, performance to host environment.

The Physical Disk belongs to the member disk of one specific volume group.

Volume Group. A collection of removable media. One VG consists of a set of UDVs and owns one RAID level attribute.

User Data Volume. Each VG could be divided into several UDVs. The UDVs from one VG share the same RAID level, but may have different volume capacity.

Cache Volume. IS16GL uses the on board memory as cache. All RAM (except for the part which is occupied by the controller) can be used as cache. User can divide the cache for one UDV or sharing among all UDVs. Each UDV will be associated with one CV for data transaction. Each CV could be assigned different cache memory size.

Logical Unit Number. A logical unit number (LUN) is an unique identifier used on a iSCSI connection which enables it to differentiate among separate devices (each of which is a logical unit).

RAIDManual background Graphic User Interface.

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APC SCSI-SATA II manual Terminology, Raid Pd Vg Udv Cv Lun Gui