Avago Technologies 3ware 9650SE-12ML (Channel) - Manual (Page 41)

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 which 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. Once you have booted
to the operating system, background initialization of the unit will begin
after a delay of up to ten minutes.
For complete information about initialization of RAID units, see “About
Initialization” on page 158.
6 If you are finished creating RAID units, be sure to check the boot
sequence for your system, as described under “Checking the Motherboard
Boot Sequence” on page 31.
Trade-offs to cancelling initialization:
• Performance of these units will be lower until initialization is
complete.
• It will take longer to complete initialization, since background
initialization takes longer than foreground initialization.