8573 60MB FIXED DISK PROBLEMS OR SYSTEM HANGS

PHYSICAL CHECK:
THE PROBLEM EXISTS IN 8573 MODEL 061'S THAT CONTAIN AN IBM 60MB FIXED DISK DRIVE THAT IS IDENTIFIED BY THE FOLLOWING COMBINATIONS OF LETTERS IN THE DISK DRIVE LABEL CONTAINING THE IBM TRADEMARK. THE LETTERS ARE: EITHER P,N,M,L,K,F,H,D,C, OR B, FOLLOWED BY EITHER N,K,L, OR M OR AN ACTUAL DATE BY MONTH AND YEAR.

 LOGO AND LETTER LOCATIONS:  ____________________________
                             |         ___  ____   _   _|
                             |          |   |   )  | V ||
                             |          |   |--<   |   ||
    IBM LOGO-----------------|----------|   |   )  |   ||
                             |         ---  ----   -   -|
                             |                          |
 P,N,M,L,K,F,H,D,C, OR B-----|-----------------> X  X   |
 N,K,L, OR M_________________|______________________|   |
                             |__________________________|

TWO COMBINATIONS OF THESE LETTERS ARE NOT INVOLVED, THESE ARE "NN" AND "PN".
THE SYSTEM MIGHT NOT EXHIBIT THE SYMPTOMS LISTED EVEN WITH THE SUSPECT DRIVES MODELS.

DETAIL:
SOME EARLY VINTAGE 60MB FIXED DISKS MAY EXHIBIT PROBLEMS WHEN USED IN THE 8573 SYSTEM. THIS IS CAUSED BY AN INCORRECT TORQUE SPECIFICATION ON THE SCREWS WHICH FASTEN THE COVER OF THE DRIVE TO THE FIXED DISK UNIT; THIS ONLY EFFECTS THE 8573 SYSTEM BECAUSE OF THE CLOSE PROXIMITY OF THE POWER SUPPLY TO THE FIXED DISK. THE SCREWS CAN NOT BE ADJUSTED IN THE FIELD.

CHECK THE FAILING SYSTEM FOR ALL THREE FOLLOWING REQUIREMENTS:

1. THE PHYSICAL CHECK CRITERIA.

2. ANY OF THE FOLLOWING SYMPTOMS:
   • SLOW OR DEGRADED SYSTEM PERFORMANCE.
   • SYSTEM HANGS.
   • AN INCREASE IN DEFECTIVE SECTORS ON THE FIXED DISK. . USE CHKDSK TO CHECK FOR INCREASE
3. FAILURES WHILE RUNNING FIVE LOOPS OF THE FIXED DISK ADVANCED DIAGNOSTIC TEST.

NOTES:
THE EFFECTS OF INCORRECT TORQUING WILL OCCUR IN THE EARLY LIFE OF THE SYSTEM; SYSTEMS IN USE AFTER DECEMBER 31, 1991 SHOULD NOT EXHIBIT THIS DEFECT.