External Hard Drive won't back up, Disk Utilty can't repair, now what?

[Dany M]

Last night I noticed that the time machine icon on the menu bar had a stop sign or something and when i clicked back up now it says it can not back up. I verified the volume and recommends a repair but it says it can not repair. Says I should back up data, reformat disk and restore

Verifying volume “Swan Station”
Error: This disk needs to be repaired. Click Repair Disk.
Verify and Repair volume “Swan Station”
Volume repair complete.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Verifying volume “Swan Station”
Checking Journaled HFS Plus volume.
Detected a case-sensitive volume.
Checking extents overflow file.
Checking catalog file.
Missing thread record (id = 26)
Incorrect number of thread records
Incorrect number of thread records
Checking multi-linked files.
Checking catalog hierarchy.
Invalid volume file count
(It should be 959677 instead of 959690)
Checking extended attributes file.
Checking multi-linked directories.
Checking volume bitmap.
Volume bitmap needs minor repair for under-allocation
Checking volume information.
Invalid volume free block count
(It should be 1359921 instead of 1359946)
Volume header needs minor repair
The volume Swan Station was found corrupt and needs to be repaired.
Error: This disk needs to be repaired. Click Repair Disk.
Verify and Repair volume “Swan Station”
Checking Journaled HFS Plus volume.
Detected a case-sensitive volume.
Checking extents overflow file.
Checking catalog file.
Missing thread record (id = 26)
Incorrect number of thread records
Incorrect number of thread records
Checking multi-linked files.
Checking catalog hierarchy.
Invalid volume file count
(It should be 959677 instead of 959690)
Checking extended attributes file.
Checking multi-linked directories.
Checking volume bitmap.
Volume bitmap needs minor repair for under-allocation
Checking volume information.
Invalid volume free block count
(It should be 1359921 instead of 1359946)
Volume header needs minor repair
Repairing volume.
Missing directory record (id = 26)
The volume Swan Station could not be repaired.
Volume repair complete.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.

Can anyone help?

 

[danny_w]

I just had a similar thing happen with a Seagate Freeagent Go 640GB drive which worked perfectly under Windows. After several tries I finally sold the drive (I made it clear that it gave problems with my Mac) and got a different kind (Iomega eGo triple interface). I will never own another Seagate for any reason.

 

[Dany M]

Well this is happening to m iomega 320gb for my macbook