In computer science, storage virtualization is "the process of presenting a logical view of the physical storage resources to" a host computer system, "Treating all storage media in the enterprise as a single pool of storage.
Technology to presents a logical
view of physical storage
resources to hosts.
Direct-attached storage is
digital storage directly attached
to the computer accessing it and
opposite to storage accessed
over a computer network.
DAS include hard drives, solid-
state drives, optical disc drives,
and storage on external drives.
Network-attached storage (NAS)
is a type of dedicated file
storage device that
provides local area
network (LAN) nodes with file-
based shared storage through
A standard Ethernet connection.
Dedicated access of specific
portion (called LUN) of the
storage. This is block level
storage. ISCI (lower performance
& lower cost, data transfer:
supports 1gigabit/sec) or FC (better performance, requires
dedicated card (HBA) on server, 4
gigabit/sec) protocol is used
here within network switch. Uses
dedicated network & top data
security provider for large scale
- Increased storage
- Adding or deleting
storage without affecting
- Non-disruptive data