proavio RS16FS User Manual page 6

RS16 FS – Manual v.6.1A
usual without any impact to end users. The "on-the-box" implies that it does not
require any proprietary agents installed at host side. The snapshot is taken at
target side and done by ULTRASTOR controller. It will not consume any host
CPU time thus the server is dedicated to the specific or other application. The
snapshot copies can be taken manually or by schedule every hour or every day,
depends on the modification.
ULTRASTOR controller is the most cost-effective disk array controller with
completely integrated high-performance and data-protection capabilities which
meet or exceed the highest industry standards, and the best data solution for
small/medium business (SMB) 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 is the abbreviation of "Redundant Array of Independent
RAID
Disks". There are different RAID levels with different degree
of the data protection, data availability, and performance to
host environment.
The Physical Disk belongs to the member disk of one specific
PD
RAID group.
RAID group. A collection of removable media. One RG
RG
consists of a set of VDs and owns one RAID level attribute.
Virtual disk. Each RG could be divided into several VDs. The
VD
VDs from one RG share the same RAID level, but may have
different volume capacity.
Cache Volume. Controller uses onboard memory as cache.
CV
All RAM (except for the part which is occupied by the
controller) can be used as cache.
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