usb-storage: device found at 2 usb-storage: waiting for device to settle before scanning Vendor: Maxtor 3 Model: 2049H2 Rev: YAH8 Type: Direct-Access ANSI SCSI revision: 00 usb-storage: device scan complete SCSI device sda: 39851759 512-byte hdwr sectors (20404 MB) sda: assuming drive cache: write through SCSI device sda: 39851759 512-byte hdwr sectors (20404 MB) sda: assuming drive cache: write through sda: [mac] sda1 sda2 sda3 sda4 sd 0:0:0:0: Attached scsi disk sda Buffer I/O error on device sda4, logical block 0 Buffer I/O error on device sda4, logical block 1 Buffer I/O error on device sda2, logical block 32767 Buffer I/O error on device sda4, logical block 0 Buffer I/O error on device sda3, logical block 4948691 Buffer I/O error on device sda3, logical block 4948691 Buffer I/O error on device sda4, logical block 0 Buffer I/O error on device sda4, logical block 0 Buffer I/O error on device sda4, logical block 0 Buffer I/O error on device sda4, logical block 0 Same device works fine in OSX and on a Gentoo x86 install on different machine.
Can you try this on a more recent release, since I won't have the hardware to verify this. We've updated kernels (of course) so hopefully this should have resolved itself with newer releases.
Please reopen if this is still an issue.