Promise Technology UltraTrak100 TX8 - Manual (Page 18)

UltraTrak100 TX4 and UltraTrak100 TX8
User Manual
12
JBOD
Characteristics/Advantages Disadvantages
Uses 100% capacity of all hard drives The failure of just one drive will result in all
data in an array being lost
Should not be used in mission critical
environments
Recommended Applications for JBOD
•
File archiving
•
General fileserver
HOT SPARE DRIVE(S)
A good precaution to protecting your array integrity in the event of drive failure is
maintaining a hot spare drive. A hot spare is a drive that is connected to the array
system, but is not assigned as a member of the array. In the event of the failure of
a drive within a functioning fault tolerant array, the hot spare is activated as a
member of the array. The spare drive effectively takes the place of the failed drive
and the RAID system immediately begins to rebuild data on the drive. When the
rebuild is complete, the array is returned to fault tolerant status. Once the failed
drive is replaced, the new drive is automatically recognized as a hot spare in the
event of a subsequent drive fault.
P
ARTITION AND
F
ORMAT THE
A
RRAY
Like any other type of fixed disk media in your system, a RAID array must also be
partitioned and formatted before use. Use the same method of partitioning and
formatting on an array as you would any other fixed disk.
Depending on the operating system you use, there may or may not be various
capacity limitations applicable for the different types of partitions.