Many people are asking whether or not our products work with Lion. As of today, the current versions of both iDefrag (2.0.5) and iPartition (3.3.1) are compatible with Lion, with the following caveats:

• iDefrag’s “Reboot and defragment” mode does not function with Lion (yet… we are working on this). As a result, to run an off-line defragmentation algorithm you will need to boot from a different partition or disk, or from a bootable DVD, which you can create by choosing the “Create Boot Disk…” option from the “iDefrag” menu.

• iPartition will display the partition type for Core Storage partitions as 53746F72-6167-11AA-AA11-00306543ECAC, which is the GUID (Globally Unique IDentifier) that Apple is using for Core Storage. This is expected behaviour, but we will be adding a name for this partition type in the next update.

• iPartition is not able to format or non-destructively resize Core Storage (i.e. Lion FileVault) partitions. As far as we are presently aware, there is no documentation for either the Core Storage volume format, or for the associated library that ships with Mac OS X, and it is therefore unlikely that we will be able to support Core Storage in iPartition any time soon.

We intend to release updates for both iDefrag and iPartition in due course to address some of these issues.

UPDATE: We have now released version 2.1.0 of iDefrag and version 3.3.2 of iPartition which have full Lion support.