User`s manual

APPENDIX
A A
might be able to affect these assignments is to switch the PCI slot
that the card is in.
Q: How does the FastTrak/66 RAID contr oller provide storage and/
or data protection with their arrays?
A: FastTrak66 implements third different types of RAID levels as follows:
RAID 0 (stripe)
For capacity -- The FastTrak/66 array will be as big as the smallest
HDD in the array times however many HDDs are in the array. Any
larger HDDs will simply be truncated. The truncated space on the
bigger HDDs will then be unusable.
For sustained data transfers -- Using FastTrak/66, a RAID 0 array
consisting of two HDDs will transfer at about twice the speed of the
slowest HDD in the array. A RAID 0 array consisting of four HDDs will
transfer at about three times the speed of the slowest HDD in the
array.
RAID 1 (mirror)
For capacity -- The FastTrak/66 array will be as big as the smallest
HDD in the array. The larger HDD will simply be truncated. The
truncated space on the bigger HDD will then be unusable.
For sustained data transfers -- The FastTrak/66 array will write data
at the rate of the slowest HDD in the array. The FastTrak/66 array will
read data at twice the rate of the slowest HDD in the array.
JBOD (spanning)
For capacity -- The FastTrak/66 array will combine the sizes of the
HDDs in the array. As soon as one HDD is filled to capacity, the next
HDD will automatically be used.
For sustained data transfers -- There is no performance increase
with spanning (reading or writing).
A-2