IBM TotalStorage SAN16M-2 Express Model 202616E ユーザーズマニュアル
製品コード
202616E
a cluster of servers. When a server fails
or must be taken offline for mainte-
nance a backup server is available to
continue operation with a minimum of
impact. Redundant paths to data are
usually configured in a clustered server
environment for the same reasons in an
effort to provide continuous access to
data. Each server is configured with
redundant Host Bus Adapters. And
each Host Bus Adapter is connected to
a different SAN switch, and each switch
is connected to a different controller in
a disk system. Every effort is made to
provide continuous application access
to data.
The SAN16M-2 Express Model is an
excellent switch to use in a clustered
server environment. Separate SAN
switches enable two separate SAN fab-
rics, which are desirable as a means to
minimize or eliminate single points of
failure. The tan cluster shown on this
page provides redundant components
at every level and is designed to mini-
mize application outages.
Business continuity solution
Many small and medium size compa-
nies want to implement a business con-
tinuity or remote backup capability to
meet strict new regulatory require-
ments. The SAN16M-2 Express Model
can provide the SAN connectivity
required for these environments.
The diagram on the next page is
intended to represent two different
sites. The blue side represents the pro-
duction site and the green side repre-
sents the remote or backup site.
Many disk subsystems, including
IBM TotalStorage DS4000 systems, are
capable of copying data to a remote
location. The data path for the remote
copy operation is represented by the
red links in the diagram.
Two SAN16M-2 Express Model
switches can be connected over metro
distances (up to 10km) using longwave
SFP optical transceivers. Longer dis-
tances can be supported with SAN
routers which transmit Fibre Channel
Protocol (FCP) over Internet Protocol
(IP) networks.
Two SAN16M-2 Express Model
switches can also be used to connect
two locations to enable remote data
backup. An Information Lifecycle
Management (ILM) application such as
IBM Tivoli Storage Manager (TSM)
which runs on a server in the produc-
tion site can write data to a tape sys-
tem at a remote location. The same
distance capabilities are available as for
the business continuity solution
described above.