Before upgrading the server, we created a disk image to ensure we could restore the system if anything went wrong.

Before installing the new OS, make sure the boot disk is properly formatted and contains the correct drivers.

During the ophthalmology exam, the physician noted swelling around the optic disk, which suggested increased intracranial pressure.

The inventor repaired the antique Nipkow disk, a mechanical image-scanning device that was fundamental to early mechanical television.

The museum displayed a rare floptical disk from the early 1990s alongside other obsolete storage media.

The biologist carefully examined the chicken egg's germinal disk under the microscope to determine if it was fertilized.

I found an old Zip disk in the attic that still contains family photos.

The IT department replaced several old disk drives to improve server performance.

For development testing, she created a RAM disk to speed up temporary file operations.

Astronomers observed fluctuations in the brightness of the accretion disk surrounding the black hole.