Failback Join; Fcip; Firewall; Frame - American Megatrends StorTrends 1100-P User Manual

start performing I/Os. NAS volumes will be mounted and shares will be made available
after a Failover from the newly ACTIVE system (B).

Failback join

Failback join is a process by which the old ACTIVE system (A) joins with the new
ACTIVE system (B) after a failover. The old ACTIVE system (A) will become
PASSIVE and starts receiving snapshots from the new ACTIVE system (B). In such
scenarios, the most recent matching snap group is identified across old ACTIVE (A) and
new ACTIVE (B) and Snap Assisted Replication starts from that point onwards from the
new ACTIVE (B) to old ACTIVE (A).
Failback
Failback is a process in which the current PASSIVE system (A) regains ACTIVE role
from current ACTIVE system (B). Sometimes the administrator might prefer to recover
the new PASSIVE to ACTIVE after a Failover due to administrative reasons. This
normally happens after a failback join and after all snapshots in the ACTIVE system (B)
are replicated to PASSIVE system (A). After Failback, the system (A) will become
ACTIVE and system (B) will become PASSIVE. Volumes will be exported from system
(A) for normal IO (SAN volumes) or as Shares (NAS volumes). Snap Assisted
Replication will happen from ACTIVE system (A) to PASSIVE system (B).
Failback is an identical reverse operation of Failover and all the steps mentioned in
Failover are done during a Failback.
FC SAN
Fibre Channel Storage Area Network. Basically, a storage device that is purposely built
as a robust block-level networked storage device. Suitable for data centers. Limitations
includes, large investment ($60K USD to $120K USD), Fibre Channel protocol expertise,
requires integration from multiple vendors, and requires double the equipment for
disaster recovery and redundancy.

FCIP

Fibre Channel over TCP/IP. FCIP is a TCP/IP-based tunneling protocol for connecting
geographically distributed Fibre Channel SANs transparently to both Fibre Channel and
IP.

Firewall

A set of related programs, located at a network gateway server that protects the resources
of a private network from users from other networks.

Frame

A frame is a single data packet that is transmitted across a network.
FTP
An application protocol commonly used to transfer Web page files from their creator to
the computer that acts as their server for everyone on the Internet. Also commonly used
to download programs and other files to your computer from other servers.
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