I tried the reboot from menu and verified that it reformatted 3 times out of 5. I just shipped my Seagate 1.5 TB and Ultra enclosure (package deal) back to Tiger Direct for a refund. It "NEVER" reformatted when pulling power cord. Note: I called D* for price of D22, same as Best Buy $199. Costco is $169. No word on H23 yet. Since my Seagate/Ultra cost $185 with shipping and tax. I will probably just buy the H22 or H23. Less hassle.