Epson 10020 - Manual (Page 126)

3. If you can boot from a diskette but cannot access data
stored on your hard disk, you may have accidentally
repartitioned or reformatted part or all of the disk.
Use the Display Partition Information option of the FDlSK
program to see if your hard disk has an active (bootable)
DOS partition on it. If it does not, back up all your files
and then use FDISK to create an MS-DOS partition. See
your MS-DOS Reference Manual for instructions on using
FDISK.
If your hard disk does have an active DOS partition, back
up all your files and then try reformatting your hard disk
using SELECT. See Appendix F, “Preparing a Hard Disk
for Use,” for instructions.
WARNING
Reformatting destroys all the data currently on your hard
disk, so do this only after careful consideration and after
trying the preceding steps.
4. If your hard disk is producing a lot of read/write errors or
you are having other serious problems with it, try running
the Hard Disk Drive and Controller diagnostics check, as
described in Appendix D of this manual. If the diagnostics
program indicates an error, contact your Epson Customer
Care Center. Never open the sealed unit that encloses the
hard disk.
5. If you have been using your hard disk for a long time and
begin to see numerous read/write errors, the magnetic
signals on the disk may be getting weak. If this is the case,
you may need to reformat the hard disk. If you decide to do
this, follow these steps:
Back up all the data on the disk using the BACKUP
command (described in the MS-DOS manual).
5-10 Troubleshooting