I think the problem is either with the reformatting or possibly a hardware problem with the ATA 3 bus. I would move one of the 128 GB drives back to the rear ATA 6 bus because it is faster and the new location might help with the troubleshooting, depending on the results. On Sat, 24 Nov 2007 15:42:15 -0800, Harry Freeman wrote: > > From what I have found out your Mirror Drive Door G4 only supports > ATA100 which means the maximum amount of disk drive it will support > without special software is 128 Gb. > This is not true and if it were the drives should still show as 128 GB as far as I know. Here is the report of the drives on my MDD. In your first post you said the drives had so much "available " capacity but you didn't report the "total " capacity. Was there a difference? S Kennedy ATA-6 Bus: Vendor ID: 0x106b Device ID: 0x0033 Revision ID: 0x0000 WDC WD3200AAJB-00TYA0: Capacity: 298.09 GB Model: WDC WD3200AAJB-00TYA0 Revision: 00.02C01 Serial Number: WD-WCAPZ0641589 Removable Media: No Detachable Drive: No BSD Name: disk2 Protocol: ATA Unit Number: 0 Socket Type: Internal OS9 Drivers: Yes Big_Mac_1: Capacity: 297.96 GB Available: 39.44 GB Writable: Yes File System: Journaled HFS+ BSD Name: disk2s10 Mount Point: /Volumes/Big_Mac_1 WDC WD3200AAJB-00TYA0: Capacity: 298.09 GB Model: WDC WD3200AAJB-00TYA0 Revision: 00.02C01 Serial Number: WD-WCAPZ0885613 Removable Media: No Detachable Drive: No BSD Name: disk1 Protocol: ATA Unit Number: 1 Socket Type: Internal OS9 Drivers: Yes Big_Mac_2_1: Capacity: 165.71 GB Available: 105.23 GB Writable: Yes File System: Journaled HFS+ BSD Name: disk1s10 Mount Point: / Big_Mac_2_2: Capacity: 132.12 GB Available: 84.04 GB Writable: Yes File System: Journaled HFS+ BSD Name: disk1s12 Mount Point: /Volumes/Big_Mac_2_2