Create a new partition

[Mais78]

Thanks, not entirely sure how I got here...but seems now I have the external drive and two unencrypted partitions underneath (see pic), and I can easily change the size of the partitions with Disk Utility. The first partition, External Drive, I am using it for pictures, the second one, Time Machine, I allocated it to, guess what, TM.

Ideally now I would like to encrypt both partitions:

1) When I set up TM I did not chose to encrypt the backups, is this decison reversible? If so (how?) I don't need to encrypt the TM partition as the backups will be already encrypted.

2) Encrypting "External Drive": In the Disk Utility File menu I don't see an option to encrypt (there is just "Turn off encryption" greyed out. Where in disk utility can i encrypt this partition? I assume that if I use the Erase menu to change the format from OS Journaled to OS Journaled Encrypted this will erase the whole content of the partition. So the only option is to encrypt from the right click menu in the Finder? BTW in the Finder I have this option only for the External Drive partition and not for the Time Machine partition.

Assuming I have now encrypted the two partitions (or Just one), if I understood correctly, if one of the partitions within a drive is encrypted I cannot change the size of the partitions. To decrypt I will select the partition (main line or indent? I understand that if I encrypt, both partitions will show as main drives with one indent each), then from the Disk Utility File menu I will choose Turn Off Encryption, I wait a bit because there is no status indicator, I do the same for the second partition and this should get me to the starting point where I had one drive and two partitions underneath.

Did I understand correctly? Steep learning curve for a mac virgin!

 

[Weaselboy]

Thanks, not entirely sure how I got here...but seems now I have the external drive and two unencrypted partitions underneath (see pic), and I can easily change the size of the partitions with Disk Utility. The first partition, External Drive, I am using it for pictures, the second one, Time Machine, I allocated it to, guess what, TM.

Ideally now I would like to encrypt both partitions:

1) When I set up TM I did not chose to encrypt the backups, is this decison reversible? If so (how?) I don't need to encrypt the TM partition as the backups will be already encrypted.

2) Encrypting "External Drive": In the Disk Utility File menu I don't see an option to encrypt (there is just "Turn off encryption" greyed out. Where in disk utility can i encrypt this partition? I assume that if I use the Erase menu to change the format from OS Journaled to OS Journaled Encrypted this will erase the whole content of the partition. So the only option is to encrypt from the right click menu in the Finder? BTW in the Finder I have this option only for the External Drive partition and not for the Time Machine partition.

Assuming I have now encrypted the two partitions (or Just one), if I understood correctly, if one of the partitions within a drive is encrypted I cannot change the size of the partitions. To decrypt I will select the partition (main line or indent? I understand that if I encrypt, both partitions will show as main drives with one indent each), then from the Disk Utility File menu I will choose Turn Off Encryption, I wait a bit because there is no status indicator, I do the same for the second partition and this should get me to the starting point where I had one drive and two partitions underneath.

Did I understand correctly? Steep learning curve for a mac virgin!

1. Just go back to the TM pref pane and in select disk check the encrypt box and it will encrypt the TM partition. You are sort of not encrypting the backup as much as you are encrypting the disk. Then end result here is that volume will be converted to the same encrypted volume like you had before with the double volume names. Same as if you did it in Disk Util.

2. Yes, if you use the encrypted option in Disk Util that will erase the drive. The right click you mentioned is what you want. It will be same end result but without erasing. The right click converts it to encrypted rather than reformatting as encrypted.

And yes... you are in track with that last paragraph. Just run diskutil cs list and you can see encrypt/decrypt progress.

 

[Mais78]

Great thanks a lot! If only I could get sharper fonts in Yosemite I would now be all set.