ACTi XNR-4200 V1.02.13 - Manual (Page 27)

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XNR-4200 User’s Manual 1.02.13
27
RAID Types and Number of Disks
Each RAID type has its requirement of minimum hard disk number. Here‟s a table of available
RAID levels with different numbers of disks.
n = the number of hard disks used
RAID
Type
Number of
disks (n)
Tolerates
the failure
of disks
Max
Available
Capacity
(2TB for each
hard drive)
Usable
Storage
Space
Read
Speed
Write
Speed
RAID 0 1-6 0 12TB n nX nX
RAID 1 2 1 4TB n/2 2X 1X
RAID 5 3-6 1 10TB n - 1 (n-1)X (n-1)X
RAID 10 4 or 6 1 of each pair 6TB n/2 nX nX
Storage Calculation
If you have already decided the RAID type that fits best with your project requirements then
you can take good use of our MS Excel based storage calculator that helps you with
calculating the total storage space available in given RAID configuration
Download the Storage Calculator from ACTi website:
http://www.acti.com/download_file/KnowledgeBase_UploadFile/ACTi_standalone_NVR_RAID
_storage_calculator_v_1_0_20110504_001.xlsx
Compatible Hard Disks
ACTi has tested and announced the full compatibility with following hard disks:
Brand Class Model Capacity Interface Cache Spin Speed
Seagate
Enterprise ST2000NM0011 2TB SATA 6 Gb/s 64MB 7200
Desktop
ST3250318AS 250GB SATA 3 Gb/s 8MB 7200
ST32000641AS 2TB SATA 6 Gb/s 64MB 7200
Western
Digital
Enterprise
WD1002FBYS 1TB SATA 3 Gb/s 32MB 7200
WD2002FYPS 2TB SATA 3 Gb/s 64MB IntelliPower
WD2003FYYS 2TB SATA 3 Gb/s 64MB 7200
WD1003FBYX 1TB SATA 3 Gb/s 64MB 7200
Desktop
WD2002FAEX 2TB SATA 6 Gb/s 64MB 7200
WD1002FAEX 1TB SATA 6 Gb/s 64MB 7200
Desktop and Enterprise are two common product classes most hard drive manufacturers use
to differentiate drive models of two different usages. The differences between these classes