As part of new and better support for external drives, Backblaze now creates a ".bzvol" directory at the top level of every drive it backs up. Inside this hidden directory is a tiny file that identifies this hard drive for the rest of time. To view the .bzvol on the Mac you can:
1. Click on the Finder
2. Press the Command + Shift + G
3. Copy and paste the following text (ignore the quotes): "/.bzvol"
4. The folder should be available for copying and modification
If you have an external drive use the following text (ignore the
For example, if you had an external drive named "Media" you would type
"/Volumes/Media/.bzvol" into the
text input which appears after you press Command + Shift + G.
Why was my external drive removed from the backup?
If your external drive was not connected to your computer at the time of the update to the latest version of Backblaze, then Backblaze could not create the hidden ".bzvol" directory, and therefore had to remove this hard drive from the backup.
Do you Clone Hard Drives?
If you clone a drive that is selected for backup by Backblaze, it will clone the ".bzvol" directory. This confuses Backblaze, because now the two different hard drives have the same id.
RECOMENDED SOLUTION: two hard drives should never have the same bzvolumeid. Therefore you need to do two things:
- Edit your cloning software (SuperDuper, Carbon Copy) to exclude the .bzvol folder.
Here is how to exclude .bvol on SuperDuper.
Here is how to exclude .bvol on Carbon Copy Cloner.
Here is how to exclude .bzvol on DroboCopy
- Remove the contents of .bzvol folder that has already been cloned. The .bzvol folder is hidden. So on the Mac use the finder's "Go to folder..." menu item and type in "/Volumes/ExternalDriveName/.bzvol" and click Go. Then select all the files and move them to trash.
ALTERNATIVELY (not recommended) you can suppress this warning dialog by creating a file called "bzstop_clonewarn" in the ".bzvol" folder of both the Original hard drive and cloned hard drive.
I Am Getting a Warning about Duplicate bzvolume ids?
See the above entry for "Do you Clone Hard Drives?"
How do I select my external hard drive again?
Easy! Just follow these steps:
1. Connect the external hard drive and make sure you an see the files on it.
2. Bring up the "Settings..." dialog in your Control Panel and select the drive.