Hitachi G200 - Journal Volume

journal
In a Universal Replicator system, journals manage data consistency between multiple
primary volumes and secondary volumes. See also consistency group (CTG).
journal volume
A volume that records and stores a log of all events that take place in another volume.
In the event of a system crash, the journal volume logs are used to restore lost data
and maintain data integrity.
In Universal Replicator, differential data is held in journal volumes until it is copied to
the S-VOL.
L
L1 pair
See layer-1 (L1) pair.
L2 pair
See layer-2 (L2) pair.
LAN
local-area network
layer-1 (L1) pair
In a ShadowImage cascade configuration, a layer-1 pair consists of a primary volume
and secondary volume in the first cascade layer. An L1 primary volume can be paired
with up to three L1 secondary volumes. See also cascade configuration.
layer-2 (L2) pair
In a ShadowImage cascade configuration, a layer-2 (L2) pair consists of a primary
volume and secondary volume in the second cascade layer. An L2 primary volume can
be paired with up to two L2 secondary volumes. See also cascade configuration.
LBA
logical block address
LCP
local control port; link control processor
LCU
logical control unit
LDEV
logical device
LDKC
See logical disk controller (LDKC).
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Glossary-11
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models