If I have a disk with existing data and move it to a new system, do I *initialize* the disk within Windows Disk Manager when the wizard launches? I thought I remembered that the wizard prompted you to write a signature to the new disk, but Initialize to me sounds like a separate, destructive option. But looking around a bit I see several posts implying that Initializing a disk is simply writing the signature, and will not delete data. I have a customer who migrated a SAN volume over the weekend. He stated that he initialized the disk within Disk Manager on the new host, but after doing so the drive had no data. They had a backup and will try again next weekend. Initializing a volume in SAN terminology is destructive. Does MS have a different definition... is initializing within Disk Manager a non-destructive process? The previous host was Windows Server 2003. I believe the new server is running 2008 R2... if that matters. Thanks for any info.