Sorry for not writing enough information
the hard drive was being used on another server running the same version of Sco (ver 5,0,5) as a second hard drive. A lot of files were copied into it resulting in it being full. It was causing my server to fail to boot.
I am now trying to mount it on my backup server so that i can remove some files from it.
It is showing NON FS under the file type after boot.