(19)

(11)

EP 0 446 250 A1

(12)

(43) Date of publication: 18.09.1991 Bulletin 1991/38 (21) Application number: 89913194.0 (22) Date of filing: 07.11.1989

(51) International Patent Classification (IPC):  G06F 13/ 10( . ) G06F 9/ 445( . ) G06F 3/ 06( . ) G11C 29/ 48( . ) (86) International application number: PCT/US1989/005033 (87) International publication number: WO 1990/005339 (17.05.1990 Gazette 1990/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 10.11.1988 US 19880269586 (71) Applicant: MAXTOR CORPORATION San Jose, CA 95134 (US)	(72) Inventors: McKINLEY, David Campbell, CA 95008 (US) GALE, Warren Ripon, CA 95366 (US) TSENG, John Fremont, CA 94539 (US) (74) Representative: Zenz, Joachim Klaus, Dipl.-Ing., et al  Zenz, Helber, Hosbach & Partner Patentanwälte Am Ruhrstein 1 D-45133 Essen D-45133 Essen (DE)