Table of Contents
Advertisement
Appendix A Troubleshooting & Frequently Asked
Questions
What kind of OS is
used in NAS-7450 /
7850?
Are the OS of
NAS-7450 / 7850
stored in the hard
disk drive?
Is there any storage
management
function provided of
NAS-7450/ 7850?
What about user
license of NAS-7450
/ 7850?
What RAID policy
dose NAS-7450 /
7850?
Should the hard
disk drives be
connected onto the
same SATA channel
while creating a
Device
NAS-7450 / 7850 are equipped with the Linux-based OS that is
optimized for networking storage. Planet develops the OS to be
seamlessly integrated with its own SlimServer technology.
No, OS of NAS-4750/7850 are not stored in hard disk drive. Instead,
OS and system configuration information of NAS-7450/7850 are
stored in the CF Card.
RAID management, disk quota and scan disk are management
functions provided for NAS-7450/7850.
Unlike other OS, there is no user license fee based on the user
number. What you pay includes the hardware and OS of
NAS-7450/7850 that can be used in any kind of networking
environment.
RAID
NAS-7450/7850 supports three RAID policies:
RAID 0: Stripe/Span. (2 ~ 8 hard disk drives). It interleaves data
across multiple disks for better performance. Safeguard function is
not provided in RAID 0.
RAID 1: Mirror. (Multiplication of 2 hard disk drives). It provides
100% duplication of data into paired hard disks. This offers the
highest reliability, but doubles the storage cost.
RAID 5: Striped with Rotating Parity (3 ~ 8 hard disk drives). Data is
striped across three or more drives. Parity bits are used for fault
tolerance.
RAID 6: RAID 6 (striped disks with dual parity) combines four or
more disks in a way that protects data against loss of any two disks.
RAID 10: RAID 1+0 (or 10) is a mirrored data set (RAID 1) which is
then striped (RAID 0), hence the "1+0" name. A RAID 1+0 array
requires a minimum of four drives – two mirrored drives to hold half
of the striped data, plus another two mirrored for the other half of the
data. In Linux, MD RAID 10 is a non-nested RAID type like RAID 1
that only requires a minimum of two drives and may give read
performance on the level of RAID 0.
No, you can group any hard disk drives (No Init) that are available on
the SATA channels of the NASt-7450/7850. In order to gain better
performance for RAID device, we will suggest to group hard disk
drives located in the different SATA channels. For example, you
have 6 hard disk drives connected to the NAS-7450/7850 and you
want to create two RAID level 5 devices. RAID group A should
90
Advertisement
Table of Contents
