I have. If the disk failure is simply a bad block on another drive, Netapp can sometimes product a patch that will "skip" that block and allow you to continue to use the filesystem and then after it's done rebuilding from the first failed disk, you can fail and rebuild the second failed disk. But this can be time consuming since you'll have to recheck your filesystem for possible corruption, and even after you fix that you have some data files somewhere that are corrupted that you don't know about. ---
There are actual 'secret ninja' commands & tricks to do this with the OS a customer is currently running, that can be used to get around a severely abused drive or two in the case of an emergency rebuild. I have had to use this with customers who more often than not..have just relocated thier toaster from one rack/building to another, which says a LOT about proper drive treatment..Ive seen people really get slam-happy on replacing drives in the shelves as well..seeding thier own future drive failure issues. Bruce describes the situation rather nicely.
BUT..those secret commands and options..are things you will get from Tech Support should you have to need them (truly a rare experience for TS to have to use them) and you wont get em from me. *grin*
PS: Renew your support, is your data worth it?
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Mohler, Jeff