HP XP P9500 Storage User Manual
Page 126
The following HP products use the term P-VOL: Remote Web Console, Snapshot, Business Copy,
Business Copy Z, Continuous Access Synchronous, Continuous Access Journal, Continuous Access
Journal Z, and External Storage Access Manager.
See also secondary volume (S-VOL).
R-JNL
restore journal
R-SIM
remote service information message
R-site
remote site (used for Continuous Access Journal)
R-VOL
See remote volume (R-VOL).
R/W
read/write
R/W, r/w
read/write
RAID
redundant array of inexpensive disks
RAID group
A redundant array of inexpensive drives (RAID) that have the same capacity and are treated as
one group for data storage and recovery. A RAID group contains both user data and parity
information, which allows the user data to be accessed in the event that one or more of the drives
within the RAID group are not available. The RAID level of a RAID group determines the number
of data drives and parity drives and how the data is “striped” across the drives. For RAID1, user
data is duplicated within the RAID group, so there is no parity data for RAID1 RAID groups.
A RAID group can also be called an array group or a parity group.
RAID level
The type of RAID implementation. RAID levels include RAID0, RAID1, RAID2, RAID3, RAID4,
RAID5 and RAID6.
RCP
remote control port
RCU
See remote control unit (RCU).
RCU target port
A fibre-channel port that is configured to receive remote I/Os from an initiator port on another
storage system.
RD
read
remote console PC
A previous term for the personal computer (PC) system that is LAN-connected to a RAID storage
system. The current term is Remote Web Console PC.
remote control port
(RCP)
A serial-channel (ESCON) port on a Continuous Access Synchronous main control unit (MCU)
that is configured to send remote I/Os to a Continuous Access Synchronous remote control unit
(RCU).
remote control unit
(RCU)
A storage system at a secondary or remote site that is configured to receive remote I/Os from
one or more storage systems at the primary or main site.
remote copy
See remote replication.
remote copy
connections
The physical paths that connect a storage system at the primary site to a storage system at the
secondary site. Also called data path.
remote replication
Data replication configuration in which the storage system that contains the original data is at a
local site and the storage system that contains the copy of the original data is at a remote site.
Continuous Access Synchronous and Continuous Access Journal provide remote replication. See
also in-system replication.
remote site
See secondary site.
remote volume
(R-VOL)
In Continuous Access Synchronous Z, a volume at the remote site that contains a copy of the
original data on the main volume (M-VOL) at the main site.
restore journal
(R-JNL)
Holds differential data on the secondary Continuous Access Journal system until it is copied to
the secondary volume.
resync
“Resync” is short for resynchronize.
RF
record format
RIO
remote I/O
RL
record length
RMI
Remote Method Invocation
126
Glossary