EN
| 27
Bosch Security Systems | 20 January 2004
DVAS
|
Instruction Manual
|
RAID Menu
8
RAID MENU
This page is used to create or alter settings related to
the RAID array. To access the
RAID
page, click
RAID
, on the left-hand side of the main screen.
8.1
Add Array
To create RAID arrays, from the
Add Array
tab, select
the drive(s) to be used by clicking the appropriate
check box(es). Arrays can only be built when there are
at least three disks. Disks allocated as spares cannot be
used without first being deleted.
Select RAID Level
Allows selection of the RAID level for the array.
Currently, RAID 0, 4, and 5 are available. Most server
applications will work best with RAID 5. RAID 4 is
suitable for lots of sequential transactions, but is not
the ideal choice for server environments. RAID 0 is
for users who need speed, not redundancy.
Select Stripe Size
Stripe size for the array designates the amount of data
written to a single disk, before moving on to the next.
Sequential access benefits from a smaller stripe size,
wheras random access benefits from a larger stripe
size. Bosch DVRs require 64KB.
Click
Create RAID Set
to continue. The RAID set
will start to build. Array construction can take several
hours to complete. Monitor the progress via the
Progress
tab, by clicking
Information
, at the left-hand
side of the page. Select the
Progress
tab to show an
overview of all utilities running on the array.
Stages of Array Mapping:
•
Array construct: Writes RAID stripes to disk.
•
Array verify: Verifies that data can be read from
each block of the array.
Depending on disk capacity, it can take up to six hours
to create a RAID Set.
Figure 28 Configuring an Array
