| Article ID: | iaor1997529 |
| Country: | Japan |
| Volume: | J79-A |
| Issue: | 6 |
| Start Page Number: | 1204 |
| End Page Number: | 1211 |
| Publication Date: | Jun 1996 |
| Journal: | Transactions of the Institute of Electronics, Information and Communication Engineers |
| Authors: | Sandoh Hiroaki, Hirakoshi Hiroyuki |
| Keywords: | quality & reliability, markov processes |
A hard disk has two failure modes: (1) failures of mechanical components and (2) failures of sectors on the magnetic medium. The failed sector can be substituted for one of the spare sectors prepared in the hard disk, while the hard disk must be replaced at a failure of a mechanical componeont. However if the cumulative number of failed sectors exceeds the number of spare sectors, it causes a hard disk failure. This study discusses a design of the number of spare sectors in a hard disk, proposing two design models. The characteristics of each model are also examined through numerical examples.