I did not face him yet (in WinUAE).
HDF was wounded. I do not believe it the update the wrong. I put it up minimum 30x
You need FFS filesystem repairer/valider. Best program is ABtools, but not found in the net. Test/use http://aminet.net/package/disk/salv/DiskSalv11_32
first use readme file!
But, new hdf is best. Create new formated hdf and backup your system (copy), some files not readable, but later fixed.