Question: On Yosemite, there is an issue where FileVault 2 will report "Encrypted Paused" during the encryption process, then never resume. It won't decrypt, and the only fix seemed to be deleting the CoreStorage volume.
Is there a fix for this besides deleting the CoreStorage volume? For example, how to unpause and either resume encryption or decrypt?
The "Encryption Paused" issue was addressed in 10.10.3. The root cause was a problem with resizing the CoreStorage volume. When the CoreStorage volume was unable to grow, the encryption was paused and could not resume until the resize issue was addressed.
To fix this issue:
1. Update your Mac to 10.10.3, or boot from an alternate drive which is running 10.10.3.
2. Un-lock the encrypted drive if necessary
3. Open Terminal
4. Run the following command to get your Mac's disk identifier:
5. Once you have the disk identifier information, run the following command:
sudo fsck_cs -y disk_identifier_goes_here
6. fsck_cs should repair the CoreStorage volume and address the resizing issue. As part of the output, it should show that encryption is resuming.
If this bug is still encountered and the above fix does not fix it, please run the following commands:
Both commands will generate diagnostic files. Once you have those files, file a bug report with Apple. After that point, back up your data and delete the CoreStorage volume (which will wipe the drive and remove all data.)
Question: What is the RAID Assistant in El Capitan's Disk Utility and what can it do?
Answer: RAID Assistant is not yet available in Developer Beta 1 (there's a mention of this in the release notes.) It's an assistant to walk people through the process of setting up striped or mirrored software RAIDs.
For more complex configurations, you may still need to use the diskutil command.