I am a newbie to macs, using a new MacBook. I just got my 2nd WD My Book 1TB Home Edt. I had it formatted and partitioned twice just fine as HFS+, but decided that I was going to move the drive to my AEB and possible my aTv. So I went into disk utilities to make it just one partition, this is where my problem started. When I went to "erase" the drive and reformat it I got a an error, "Filesystem verify or repair failed". I tried repairing the drive and nothing I new to try worked. So I plugged the drive into a WinXP machine and was easily able to reformatt it to FAT32 and/or NTFS. After this I am able to plug it into the MB again and it sees it just when. When I go to format it in HFS+ I get the same error and I have to plug the HD back into XP to reformat it..... I have tried this several times and am not find a different end result, so I am now turning to y'all for help. Yes it has the latest firmware (Jan 2009) from WD. Yes it works fine on the XP machine.