User guide

uNAS/tNASUserGuideVersion1.0 Page6
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Stripe size is configurable roughly between 64 KB and 1 MB. The result is a lightning fast RAID, but with no
added security. One failing drive may ruin the entire RAID.
RAID 1 mirrors hard drives. By writing identical data onto more than one drive, security is enhanced. A
completely defective drive does not cause any loss of data. The drawback is reduced performance and
capacity.
RAID 5 combines data striping from RAID 0 with parity checking, therefore combining speed and improved
security. The loss of one drive is tolerable.
RAID 6 extends RAID 5 by adding an additional parity block, thus it uses block-level striping with two parity
blocks distributed across all member disks. It was not one of the original RAID levels. The user capacity of
a RAID 6 array is N-2, where N is the total number of drives in the array. RAID 6 does not have a
performance penalty for read operations, but it does have a performance penalty on write operations due to
the overhead associated with the additional parity calculations.
RAID 10 is a combination of RAID 1 and 0, hence the name. Data is written in a striped and mirrored
configuration, providing high performance and robust security.
3HardwareInstallations
3.1 Installing uNAS/tNAS
Remove the unit out of shipping material
Plug in AC cord, uNAS/tNAS AC input is 90-250VAC so there is no worry for the AC input is incorrect
Connect Ethernet cable to uNAS/tNAS and your network
Connect the keyboard and monitor (they will be needed for setup only). Later you can run the server in the
"headless mode" (without keyboard and monitor).
Power the system
After boot-up complete, if the network has a DHCP server, uNAS/tNAS should gain access to the IP
settings automatically.