Oyen Digital DATATALE RS-M2QJ 2-BAY RAID - Manual (Page 43)

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Q&As
General
Q: How do I choose the proper RAID mode for my RAID System based on the
tasks I need to perform?
A: Since the RAID System is a “Mass Storage” device, which means its size
capacity is sufficient for data management, the different RAID mode settings can
help you administer the enormous data storage from the hard disks combination.
It is highly recommended to choose the RAID mode based on what is the
essential factor to complete your task. The most common three factors are size
capacity, speed, and data protection. For example, if using the RAID Unit to
simply watch films for enjoyment or for storage, the JBOD and SPAN modes are
perfect because they can maintain decent speed and still have a large storage
capacity. If the work requires instant and continuous backup of data such as for
a writer or editor, then RAID 1 would be the best choice. However, if immediate
data access were required such as business professionals, RAID 0 would be
more appropriate.
Q: Are there any limitations for SATA hard disks in RAID Systems?
A: We found that some editions of Western Digital hard drives have a
compatibility issue with our RAID Systems. At the present moment, Western
Digital manufactures both "Desktop" and "RAID" (or also called "Enterprise") hard
drive editions. The difference between the two types of hard drives is that one is
designed to work specifically in a desktop computer, and the other is made for a
RAID controller. If you would like to use a Western Digital hard drive in our RAID
Systems, it is highly recommended to use their "RAID" edition. If a "Desktop"
edition is installed into our RAID system, the hard drive may not work properly
due to its features. Please refer to Western Digital’s web site for more information
under–"What is the difference between Desktop edition and RAID (Enterprise)
edition hard drives?"
Daisy Chain
Q: Why are there two (2) FireWire 800 ports on the RAID System?
A: The two (2) FireWire 800 ports are provided to allow “Daisy Chain”. To
properly use the “Daisy Chain” feature on the RAID System: one of the FireWire
800 port needs to be connected to the host, and the other FireWire 800 port can
be used to connect another external device. The computer will not recognize the
“Daisy Chain” feature if different interfaces are connected at the same time.
Discrepancy in Reported & Actual Size Capacity
Q: If I have a 750GB hard disk, why does the RAID System only recognizes the
hard disk available space as to be less than 750GB?
A: Many customers are confused by their host systems when it reports a
discrepancy between reported capacity and actual capacity. Several factors can
come into play when your host system views and reports the capacity of a hard