>From this review:
" Lion doesn't make encrypting disks other than the boot disk particularly
easy. The Disk Utility application can remove encryption from a volume,
change a volume's encryption password, or reformat a volume with encryption
enabled (deleting all the data currently on the volume in the process), but
there is no option to transparently encrypt a volume without erasing it.
Command-line tools to the rescue: diskutil will happily attempt to encrypt
any volume you point it at, without erasing it first. Actually, the process
is to convert it to a Core Storage volume which may optionally include
On 7/22/11 9:10 AM, "David Emery" <email@hidden> wrote:
> From: "Rowe, Walter" <email@hidden>
>> External drive support
>> FileVault 2 supports encryption of external USB and FireWire drives.
> Ok, anyone know -how-? I can see how FileVault would work if the external
> drive is the boot drive. But so far I have not seen any way to enable File
> Vault on an external drive using either the Security System Preference or Disk
> And that raises a related issue: If you have a FV encrypted (boot) partition
> (I guess it's right that it's the partition and not the physical device that's
> encrypted), and you boot from another bootable partition (device), can you
> decrypt the encrypted partition using the key you got when you created the FV
> partition? This must be the case, otherwise how would you use the stored key
> for recovery. I guess I'l have to try that sometime if no one else has
> checked that out.
> David Emery, 703 298 3473 (c) 703 272 7496 (fax)
> Supporting PdM Software Integration
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