Configure the FortiAnalyzer unit RAID levels
FortiAnalyzer Version 3.0 MR3 Administration Guide
05-30003-0082-20060925 61
RAID 10
RAID 10 is only available on the FortiAnalyzer-2000. RAID 10 (or 1+0), includes
nested RAID levels 1 and 0, or a stripe (RAID 0) of mirrors (RAID 1). The total disk
space available is the total number of disks in the array (a minimum of 4) divided
by 2. Any drive from a RAID 1 array can fail without loss of data. However, should
the other drive in the RAID 1 array fail, all data will be lost. In this situation, it is
important to replace a failed drive as quickly as possible.
RAID 50
RAID 50 is only available on the FortiAnalyzer-2000. RAID 50 (or 5+0) includes
nested RAID levels 5 and 0, or a stripe (RAID 0) and stripe with parity (RAID 5).
RAID 50 provides increased performance and also ensures no data loss for the
same reasons as RAID 5. Data can be recovered even when up to four drives fail.
RAID 5 and RAID 10 with hot spare
The FortiAnalyzer-2000 and FortiAnalyzer-4000/4000A enables hot spare of hard
disk drives automatically by using one drive as a stand-by unit. When you select
one of these two options, the FortiAnalyzer unit uses five hard disks in the RAID
array, and the sixth hard disk is used as a spare, should any of the other five fail.
In the event that a hard disk fails, within a minute of the failure, the FortiAnalyzer
unit automatically substitutes the hot spared disk drive and rebuilds the data to
integrate the hard disk into the RAID array.
When you replace the hard disk with a new one, the FortiAnalyzer unit keeps the
new hard disk as the hot spare.
The FortiAnalyzer-2000 and FortiAnalyzer-4000/4000A also supports the hot
swapping of hard disks during operation. For details see “Hot swapping the
FortiAnalyzer-2000 and FortiAnalyzer-4000/4000A” on page 62.
Hot swapping hard disks
The hard disks on the FortiAnalyzer-400 and higher are hot swappable. Hot
swapping refers to removing a failed hard disk and replacing it with a new one
while the FortiAnalyzer unit remains in operation.
The FortiAnalyzer-100A/100B and FortiAnalyzer-100 units each have a single
hard disk. Hot swapping is not available on these units.
Hot swapping in the FortiAnalyzer-400 and FortiAnalyzer-800
The following diagram indicates the drive number and their location in the
FortiAnalyzer unit when you are looking at the front of the unit. Refer to this
diagram before removing the disk drive to ensure you remove the correct one.
Note: RAID 10 requires an even number of disks. For example, on the FortiAnalyzer-2000,
when selecting RAID 10 with hot spare, the FortiAnalyzer unit will use four of the six disks
in the RAID 10 array, keeping one as a hot spare. The additional hard disk will be defined
as idle. The total disk space available is 240 GB.
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