Time machine backup failure. Cannot find target disk

[hajime]

Hello, I bought a Lacie 2TB drive. At first I intended to use it to back up Windows partition. So, I reformatted it as exFAT. Then, I changed my mind and wanted to use it as a TimeMachine backup drive. I went to disk utility to reformat the drive as Mac OS Extended (Journaled) format. However, TimeMachine keeps saying that it cannot find the target disk and as a result, backup failed. I reformatted to Mac OS Extended (Journaled) format again but same problem. Know how to fix this?

 

[ddmcnair]

In Disk Utility there should be the two levels for the drive. One is the for the drive and one is for the partition. Make sure the drive is formatted with OS X Extended Journaled and the scheme is GUID Partition Map.
(The highlighted area is the drive (OS X Journaled / GUID Partition Map))


Once the Partition is created make sure it is formatted as OS Extended Journaled.

(The highlighted area is the partition (OSX Extended Journaled))

If that doesn't work, you may just have a bad drive. Good Luck!

 

[hajime]

Thanks but unfortunately, the issue remains to be the same.

. When I checked the disk info, I found: hajime, system, everyone and wheel are listed. There is no user account called wheel on my computer. Is my computer hacked?

 

[richard2]

When I checked the disk info, I found: hajime, system, everyone and wheel are listed. There is no user account called wheel on my computer. Is my computer hacked?

Was it a user or group? OS X has a system group named "wheel".