NEC Storage M100 Series User Manual page 452

User Guide
Revolutions Per Minute
It measures the number of times a disk revolve in a minute. It determines the speed of data access
on the disk drive. The higher RPM value specifies the higher data access speed.
rpm
See Revolutions Per
S
SAN
See Storage Area
SAS
See Serial Attached
SD memory card
See Secure Digital
Secret
See CHAP secret.
Secure Digital card
Secure Digital (SD) card is a compact non volatile memory card used for storing data.
Separate
When Separate is performed, the difference between Master Volume (MV) and Replica Volume
(RV) at the start of Separate is reflected into the RV to separate it. Updates made in MV after
Separate is performed are not reflected in RV.
Serial Attached SCSI
A high speed data transfer technology using SCSI which employs serial data transfer to and from
storage devices like hard disk drives.
Simple Network Management Protocol
Simple Network Management Protocol (SNMP) is used to manage devices on the network. This
protocol defines how communication occurs between SNMP-capable devices and defines the
SNMP message types. SNMP facilitates network administrators to manage network performance,
solve network problems, and plan for network growth.
Snapshot
Snapshot is a technique that copies only difference data from a Master to a Replica. Compared to a
full copy, a Replica can be created using little capacity, so storage can be operated efficiently.
SNMP
See Simple Network Management
Solid State Drive
A data storage device, which uses non-volatile memory chips to store persistent data.They are
characterized by not having any moving parts and hence are more resistent to physical shocks,
quieter, and have lower access time and latency.
Spare
Unused physical disks in a pool that can be used to replace a failed disk. In case of failure, the data
can be restored on a spare.
Release 6.0
Minute.
Network.
SCSI.
card.
Protocol.
452
Glossary