
162
Data Protector Express User's Guide and Technical Reference
NOTE:
The backup device could have been placed just as easily on any other machine in the network.
Data Protector Express does not require that the backup device be physically attached to a file or
application server. Additionally, while the term “storage management server” is a convenient label, in
fact, Data Protector Express does not require that this machine have a server operating system. It could
just as well be a PC desktop.
This arrangement offers several advantages:
1. Jobs run quickly because most of the data is transferred over local buses, instead of over the network.
In this arrangement, Data Protector Express will automatically route data from each of the file or
application servers over local buses to its own backup device. Whenever there is a choice, Data
Protector Express automatically routes data over local connections rather than network connections.
2. Administering jobs is uncomplicated. Jobs can be created and run from any machine on the network.
Note that jobs can also be administered from a machine that is a member of a different Data Protector
Express management domain. The Data Protector Express administrator or other user can log on to
this catalog from another storage domain and then create and run jobs in that storage domain.
3. Suppose a disaster occurs and the RAID device of one of the file or application servers needs to be
replaced. Because the catalog is located on another machine, recovery is quick and easy. The catalog
contains all of the information necessary to restore the lost data. Had the catalog been stored on the
file or application server, recovery would have been much more difficult. Note that the backup device
on the other file or application server can be used to help restore the file or application server that
failed.
4. Suppose the storage management server fails and the Data Protector Express catalog is lost. While the
loss of the storage management server is significant, the file or application servers are not impacted
and they can continue to perform their tasks. Backups can still be run from another machine on the
network or, if need be, from the file or application servers themselves. Since the catalog was lost, it
will have to be imported from existing tapes. This step, however, is not crucial and can be run when
convenient, as long as careful backup procedures are followed (that is, no important tapes are
overwritten and a full backup job is run immediately).
Summary of Contents for BB118BV - StorageWorks Data Protector Express Package
Page 1: ...U s e r s Gu i d ea n dT e c h n i c a l R e f e r e n c e ...
Page 339: ......
Page 345: ......
Page 365: ...Index 347 ...