On my MacBookPro (Snow Leapord OS) I have run the disk utility to erase and format this drive but I get the following message:
“Disk Erase failed with the error: POSIX reports: The operation couldn’t be completed. Cannot allocate memory”
I also tried to Partition the drive but got the same error. I want to use this external drive for cloning my system HDD and thought that reformatting the drive would be advisable before proceeding.