Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 37)

Basic Steps for Creating a Unit
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4 Type Y to continue, delete any existing data on the drives, and create the
unit.
If you chose foreground initialization, then, depending on the RAID
configuration you are creating, initialization of the unit may begin
immediately and delay your ability to use your unit for several hours.
(RAID 6 units and some RAID 5 and RAID 50 units begin immediate
initialization.).
5 If you want to immediately use a RAID configuration that has started
foreground initializing, you can press Esc to cancel the progress box.
(Before doing this, be sure to read “Trade-offs to cancelling
initialization,” below.)
You can then exit 3BM and boot to the operating system before the
process of writing zeroes to the drives is complete. After you have booted
to the operating system, background initialization of the unit begins after
a delay of up to ten minutes.
For complete information about initialization of RAID units, see “About
Initialization” on page 146.
6 After you have finished creating RAID units, check the boot sequence for
your system, as described under “Checking the Motherboard Boot
Sequence” on page 27.
Trade-offs to cancelling initialization:
Pros:
• The unit can be used immediately and is fully fault tolerant.
Cons:
• Performance of these units are lower until initialization is
complete.
• Initialization takes longer to complete, because background
initialization takes longer than foreground initialization.