Dell Compellent Series 30 - Manual (Page 64)

58 Storage Center System Setup Guide
Glossary
RAID 10-DM
RAID 10 Dual Mirror provides maximum protection for storage. Data is written
simultaneously to three separate disks. All three disks return a write acknowledgement.
RAID 10 protects against data loss when any 2 disks fail.
Redundancy
The duplication of information or hardware equipment components to ensure that if a
primary resource fails, a secondary resource can take over its function. Storage Center
provides redundancy for each component so that there is no single point of failure.
Remote System
A Storage Center system that sends or receives Replication data.
S
SAN
A storage area network (SAN) is a specialized network that provides access to high
performance and highly available storage subsystems using block storage protocols. The
SAN is made up of specific devices, such as host bus adapters (HBAs) in the host servers,
switches that help route storage traffic, and disk storage subsystems. The main
characteristic of a SAN is that the storage subsystems are generally available to multiple
hosts at the same time, which makes them scalable and flexible. Compare with NAS.
SAS
Serial Attached SCSI is a computer bus that moves data to and from computer storage
devices such as hard drives and tape drives.
SATA
Serial ATA creates a point-to-point connection between devices. Transfer rates for Serial
ATA begin at 150MBps. Thinner serial cables facilitate more efficient airflow inside a form
factor and also allow for smaller chassis designs.
SBD
SBD is not an acronym for anything. It is just the name for the SBOD Fibre Channel
connectors.
SBOD
Switched Bunch of Disks. An SBOD connects all disks in an enclosure in a Fibre Channel
- Arbitrated Loop (FC-AL) topology via an internal Switched Fabric link. All disks share
resources on the same Fibre Channel loop.
SCM
Service Control Module. SATA Fibre Channel connectors.
SCSI
SCSI (Small Computer Systems Interface) is a collection of ANSI standards that define IO
buses primarily intended for connecting storage devices to servers.