xVault xNVR200/300/400 User Guide V2.0.0
8
raid seT CONFiGUraTiON CONsideraTiON & iNFOrMaTiON
Best RaID5 or RaID6 performance is when the drive count in a RaID set is between 12 and 24 drives. Eight drives in a RaID5/6
should be considered the lowest drive count when IO and transfer rates are above anything but the most basic.
When drive counts in a RaID set are below five, it is highly recommended to use RaID10. If the capacity is low enough a mirrored
(RaID1) solution using SSD drives can be considered as a higher performance option without extravagant expense. Please consult with
your account representative.
Unless otherwise specified, Seneca’s policy is to provide RaID5 when using less that 18 drives in the set. Eighteen to twenty four drives
will default to RaID6.
the xNVR series may be optionally configured to support direct attached external storage. this provides better performance than net-
work storage (iSCSI or NaS) at a significantly lower price point.
raid reBUiLd/reCONsTrUCTiON ParaMeTers
Seneca leaves the rebuild and reconstruction parameters on the RaID controller at a factory default of 30% of total IO and Bandwidth
consumption. Customer preference of restore of defective drive versus impact on array performance which can result in frame drops is
subjective.
In house testing shows that with Rebuild and Reconstruction rates set to 20%. a replacement drive will rebuild at a rate of no more than
2.22 hours per terabyte for the drive being restored.
aPPrOxiMaTe raid MeMBer reBUiLd TiMe
Drive Size
Four or Eight Drive RaID Set
1tB
2.22 hours
2tB
4.44 hours
3tB
6.66 hours
4tB
8.88 hours
5tB
11.1 hours
6tB
13.32 hours
