Overland Storage SnapServer Administrator's Manual page 265

SnapServer GuardianOS 7.2 Administrator's Guide
Disaster Recovery
A strategy that allows a company to return to normal activities after a catastrophic
interruption. Through failover to a parallel system or by restoration of the failed system,
disaster recovery restores the system to its normal operating mode.
Discovery
Discovery is the process by which an initiator 'discovers' a target. Discovery uses a special
type of session, called a Discovery Session, where an initiator connects to a RAID storage
controller and asks it to send a list of the targets present on the controller. The target will
respond with a list of all the targets to which the initiator has access.
Disk Roaming
This is the process of removing a disk drive from a controller and putting it back later, either
on the same controller, or a different one, and having it recognized as the same disk drive.
The disks may be can be attached to different ports than they were originally attached to,
without harm to the data. The disks may be attached to the same ports or different ports on
the controller.
DNS
Short for Domain Name Service. A network service that translates domain names into IP
addresses using a server that maintains a mapping of all host names and IP addresses.
Normally, this mapping is maintained by the system administrator, but some servers
support dynamic mappings.
Domain
A set of network resources in Windows 2000/2003/2008, such as users and groups of users. A
domain may also include multiple servers on the network. To gain access to these network
resources, the user logs into the domain.
Domain Name
The ASCII name that identifies the domain for a group of computers within a network.
DSM
Short for Device Specific Module, it is a software module that allows RAID storage array
hardware to use Microsoft's MPIO.
DynamicRAID™
DynamicRAID is a powerful SnapServer feature that simplifies management of disk
additions and replacements in a RAID environment. All RAID and filesystem capacity
management is entirely automated. More capacity can be added over time by just inserting
or replacing drives. Filesystem volumes can be added and removed at will because all
volumes share the same underlying pool of storage.
Ethernet
The most widely installed LAN technology. 100BASE-T Ethernet provides transmission
speeds of up to 100 Mbps. Fast Ethernet or 1000BASE-T provides transmission speeds up to
1000 Mbps and is typically used for LAN backbone systems, supporting workstations with
100BASE-T cards. Gigabit Ethernet (GbE) provides an even higher level of backbone
support at 1000 Mbps (one Gigabit or one billion bits per second).
Ethernet Address
The unique six-digit hexadecimal (0-9, A-F) number that identifies the Ethernet interface.
10400317-003 05/2012
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