ATA disks, later called EIDE, were introduced in 1985 with a lower cost controller board. The control logic was moved to logic board on the disk assembly which free manufacturers to design new products more easily. The 40-pin cable was eventually replaced with an 8-conductor wire to allow for higher speeds.
EIDE hard disks are now generally obsolete. We have several spare EIDE disks available for refurbishing older machines. Adapters are widely available to allow older machines to use modern SATA disks.
EIDE DISK RELIABILITY
Remember there are 8,760 hours in a year. In 5 years, disks rack up 43,800 operating hours.