Texas Instruments 4000M - Manual (Page 28)

Using Disk Drives
Hard Disk The hard disk is formatted and loaded with software during
manufacture. Do not format the hard disk
Floppy The floppy drive can read from and write to
Drive formatted 3.5-inch, double-sided, high-density (2HD), 1.44 MB
floppies and to lower capacity, 720 KB, double-density (2DD)
floppies.
The floppy drive does not function at low speed with the OS/2™ or
Xenix™ operating systems.
Hard Disk Guidelines
If you format the hard disk, all data on the hard disk will be erased.
Do not move the computer when the HDD indicator is on. Press Suspend to
spin the hard drive down and put the computer into a sleep mode before
moving the computer.
Caution: If the hard disk is damaged, you can lose data. To reduce the
impact of data loss, back up the data to floppies (or any external SCSI
storage device if attached) frequently.
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