Buffalo HD-QLU3R5 User Manual page 17

■ Spanning Mode (Enables use as a large-capacity hard drive)
In this mode, all four hard drives are combined into a large single drive with capacity equal to the sum of
the four individual drives. Because data is saved without distributing to the drives, the data access speed
is the same as that of an individual drive. Spanning mode has no mechanisms for protecting data. As a
result, failure of a single drive means that all data on the drives is lost.
• Example of Hard Drive Configuration
Configuration using HD-QL4TU3R5: Recognized as 4 TB (1 TB×4) hard drive
Data
①②③④
⑤⑥⑦⑧
・・・
Enables use as a large-
capacity hard drive
16
HD-QLU3 User Manual
Data is saved in
order starting from
the first hard drive.
The total capacity
of all four drives is
usable.
Data
①②③④
Data
⑤⑥⑦⑧
Data
・・・
Data
・・・