New, identical, never used server installed. Never used ...... not a need to wipe clean.
They need to review the video security of the chappaqua residence and barn going back 2 years. They need to speak to the security people who guard that residence. It needed to be wiped clean because of the 62000 e-mails known to have originated from the server, now wiped off of the server. They need to check the serial number and its placement....tampering???? They need to physically examine the very spot of installment of the original server. signs of tampering????
If she had the disk drives replaced with brand-spanking-new ones, she will be toast. The FBI will know no data had ever been stored on those drives.
Her best bet would be handing over the real disks after having had a true pro do a thorough wipe (which she has already admitted to doing) and hoping nothing incriminating is recoverable.
But virgin drives? That's simply an admission of guilt.