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Apple Computing Products:
macOS - Operating System
External Hard drive "Decrypting...."
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<blockquote data-quote="timesign" data-source="post: 1781402" data-attributes="member: 397612"><p>Greetings - Thanks in advance for trying to assist. I am getting an error using my external hard drives with Time Machine (OS High Sierra.) A bit more background: </p><p></p><p>- Recently installed a clean version of High Sierra (previously using Yosemite or Mavericks).</p><p>- I have a number of encrypted HFS+ external hard drives that I had set up under the prior operating system. These hard drives have both data and prior time machine backups.</p><p>- <u>Good news</u>: Upon attaching any of these drives, I supply the password and can access all the folders in Finder.</p><p>- <u>Bad News</u>: In Time Machine I attempt to select an attached drive as a back up disk. In the selection box I will see the name of the disk, the available size, and the word "Decrypting". When I select the disk it asks me for the password to turn off encryption. Once I supply I get an error stating "There was an error preparing the Time Machine backup disk 'Disk name'. This Core Storage logical volume is already decrypting."</p><p>- <u>Additional</u>: In finder I right click on the external disk and there is a greyed out section that says "Decrypting 'Disk Name-...'" which presumably is preventing me from selecting other disk options and also seems to be indicating that the OS is trying to do something with the disk, even though I can access them. </p><p></p><p>What I've tried:</p><p>- Can't find a way to convert the disk to non encrypted and then encrypt back (Only option is APFS)</p><p>- Don't know why the disk immediately attempts to "decrypt" upon mounting? If not mounted Time Machine can not find it.</p><p>- Given that the Hard drives all have contents and backups and can be used for every purpose other than time machine, trying to avoid formatting them. </p><p></p><p>Thoughts?</p><p></p><p>Thanks so much!</p></blockquote><p></p>
[QUOTE="timesign, post: 1781402, member: 397612"] Greetings - Thanks in advance for trying to assist. I am getting an error using my external hard drives with Time Machine (OS High Sierra.) A bit more background: - Recently installed a clean version of High Sierra (previously using Yosemite or Mavericks). - I have a number of encrypted HFS+ external hard drives that I had set up under the prior operating system. These hard drives have both data and prior time machine backups. - [U]Good news[/U]: Upon attaching any of these drives, I supply the password and can access all the folders in Finder. - [U]Bad News[/U]: In Time Machine I attempt to select an attached drive as a back up disk. In the selection box I will see the name of the disk, the available size, and the word "Decrypting". When I select the disk it asks me for the password to turn off encryption. Once I supply I get an error stating "There was an error preparing the Time Machine backup disk 'Disk name'. This Core Storage logical volume is already decrypting." - [U]Additional[/U]: In finder I right click on the external disk and there is a greyed out section that says "Decrypting 'Disk Name-...'" which presumably is preventing me from selecting other disk options and also seems to be indicating that the OS is trying to do something with the disk, even though I can access them. What I've tried: - Can't find a way to convert the disk to non encrypted and then encrypt back (Only option is APFS) - Don't know why the disk immediately attempts to "decrypt" upon mounting? If not mounted Time Machine can not find it. - Given that the Hard drives all have contents and backups and can be used for every purpose other than time machine, trying to avoid formatting them. Thoughts? Thanks so much! [/QUOTE]
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