Quick Release Sector Transfer

The QRST disc image format was used by Compaq to distribute disk images of diagnostic software. The file QRST.EXE would be supplied with the disc images to write them to a floppy drive.

Identification
QRST files start with the 4-character ASCII string, followed by a   byte. The first character of the file extension is an underscore, followed by a 2-digit hexadecimal volume number.