Memorandum
TO:
FROM:
DATE:
SUBJECT: System Disk Crash
On July 8, 19—, we had a physical crash of the read/write heads on our oldest disk drive, the first such occurrence in the four-year life of our system. The cause of the problem was a dirty disk pack and infrequent preventive maintenance on the system.
As a result of the crash, we have a damaged disk pack and have had to replace six of 20 heads on the drive. Time for repair and recovery amounted to 15 hours.
I have contacted Chilton Company for their recommendations to prevent future occurrences and plan to take advantage of their suggestions:
• Preventive maintenance—Bordelon, out of Phoenix, will provide on-site inspection and cleaning of our packs twice a year at a cost of $16 per pack.
• Damaged pack—Marceau Computer Services will revamp our damaged pack at its main laboratory here in the city for a cost of $390. (A new pack, costing approximately $1,600, will be unnecessary.)
We fully expect these new measures will prevent recurrence of the problem.
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