
HDD CAPACITY
Q: I would like to format my hard drives with the FAT (a.k.a. File Allocation Table)
format, which can be read and written by both Mac and PC. Is there any limitation on its
capacity?
A: Yes, please check the table below for reference.
File System NTFS FAT32 FAT (Format by
Win2000 / WinXP)
FAT16
Capacity
Limitation
Vista: 16384TB
XP: 2TB
Windows: 32GB
Mac: 2TB
4GB 2GB
DISCREPANCY IN REPORTED & ACTUAL SIZE CAPACITY
Q: If I have a 750GB HDD, why does the RAID Unit only recognized the HDD available
space as to be less than 750GB?
A: In the hard drive industry the partitioned size will be less than the printed capacity on
the label. This is consistent whether it is Western Digital, Seagate, Samsung, etc. For
example, a 1TB hard drive will have a formatted capacity of approximately 932GB. This
is due to the fact that computers calculate capacity based on 1024 bytes/kilobyte, while
the hard drive calculation is based on 1000 instead of 1024. Hard drive manufacturers
define a megabyte as 1,000,000 bytes and a gigabyte as 1,000,000,000 bytes, which is
a decimal (base 10) measurement. Computers define a megabyte as 1,048,576 bytes
and a gigabyte as 1,073,741,824 bytes. These are binary (base 2) measurements. This
is why the two different industries will report different capacities for the same drive. The
number of bytes is the same, but a different number of bytes is used to make a
megabyte and a gigabyte.
REBUILD
Q: Does the RAID Unit have to be connected to the host computer when it is in rebuild
mode?
A: No, it does not have to be. The RAID Unit can support offline rebuild, which means it
can perform the rebuild function without being connected to a host computer.
RAID MASTER: CONNECTION RESTRICTION
Q: Is there any connection restrictions for the RAID MASTER?
A: Yes, the RAID MASTER can only be operated via USB 2.0 or FireWire 800. If you
choose to use eSATA for data transferring, please set up the RAID configuration via
USB or FireWire first.
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