configure RAID disks under DELL 6800 server?

[mcclnx mcc]

We have several DELL 6800 server with PERC 4e/DC Raid
card.  every time when we configure RAID 0 (mirror) or
RAID10, it will perform SYNC on disks.  This syncation
take 10 hours on 300 GB disks.

Since we are put new disks or already initalize disks,
does there has way to force PERC NOT sync disks?

Thanks. 

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