Toshiba Magnia SG30 - Manual (Page 171)

178 Managing the Server
Using the second disk drive
5.375 x 8.375 ver 2.1
This snapshot mechanism makes a complete copy of the
entire primary disk drive on a periodic basis. If
something goes wrong with your primary disk drive, you
can move the secondary disk drive to the primary disk
drive’s slot. The system will resume operation with all
files intact as of the last time a snapshot was taken. For
more information, see
“Installing the second disk drive as
the primary disk drive” on page 181 .
NOTE: This process is commonly referred to as mirroring.
However, it should not be confused with RAID mirroring, where all
files are constantly mirrored on a second disk drive, which can
significantly affect performance.
You can specify when you would like to take a snapshot
of the system. The process of copying all files from one
disk drive to the other can have an effect on server
performance, and can take several hours (on a large, full
disk). Therefore, the recommended schedule is to have
the disk drive snapshot operation automatically
performed once every night at midnight.
If you use the second disk drive for snapshots, it must be at
least the same size as your primary disk drive.
2 You can also configure the second disk drive as extra file
storage.
If you do this, the second disk drive will appear as the
directory “2ndDisk,” and can be reached by browsing in
network neighborhood. The second disk drive is
configured as a generally available disk drive – any
account can place files on it and access its contents
(similar to the public directory).
Second disk drives are automatically configured for
snapshots as the default, unless you change the
configuration.