Epson Endeavor - Manual (Page 149)

If you do not prepare the drive correctly, you cannot store data
on the disk. For example, if you partition the drive and format
it for MS-DOS (or for another operating system) but you do not
copy the operating system to the drive, you will not be able to
load the operating system from the hard disk.
If you are sure the hard disk was installed properly and you
prepared it for use as described above but you cannot access
the drive, review the instructions in your operating system
manuals. Make sure you performed each step in the installation
process correctly for your configuration.
Accessing Data on the Drive
If you have been using your hard disk drive successfully for
some time and notice a reduction in performance, the data on
the disk may have become fragmented. You may want to back
up all your data and then use a disk compaction utility to
reorganize the files on your disk. Many general utility
programs include a disk compaction utility.
If you still have trouble with your hard disk, you can back up
your data and physically reformat the disk. Then you’ll need to
reinstall the operating system and copy your files back onto the
disk. See Chapter 5 and your operating system manual for
instructions.
If you cannot access data on your hard disk or you are
receiving read/write errors, the disk may have a physical
problem. Contact your Authorized Epson Servicer.
6-20 Troubleshooting