Data General NOVA ECLIPSE 6234 Service Manual page 77

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Data General Corporation (OGCl has prepared this manual for use by DGC personnel and customers as a guide to the proper installation, operation, and
maintenance of DGC equipment and software. The drawings and specifications contained herein are the property of OGC and shall neither be reproduced in
whole or in part without DGC's prior written approval nor be implied to grant any license to make, use, or sell equipment manufactured.in accordance herewith.
(C) Series Tests Check:
• Stepping to the diagnostic track for proper current track
stepper phases, and home state
• Formatting of the entire diagnostic track
• Write operations for proper status
• SELD, clear logic
• Write/Read operations for proper status, ending MA, ending
DA, and full core compare after read
• Read header operation on all heads
• Writes to different HDS, sectors
• Multisector writes (4,8,16)
• Writes to all sectors
• The increment head logic
• Seek/Write operations for proper status
• Illegal sector, illegal surface, end of cylinder, and illegal
cylinder conditions
(E) Series Tests Check:
• 1 Sector Write/Read operations (9 different data patterns with
core compare and write CRC verified)
• 8 sector Write/Read operations (9 different data patterns),
all heads, at CYL O, MAX/2, MAX with full core compare
• The bootstrap operation with full core compare (if Unit 0)
• Write CYLt to Head O, Sector 0 of all cylinders
• Write Head t to Sector 0 of all heads on CYL 0
• Each of the above operations is followed by a corresponding
Read/Check operation to verify (DA) logic
• Seek/write and seek/read operations for full track seeks, all
heads, with full core compare
• Seek 1,2,4, ••• /recal/read operations
(F) Series Tests Check (Hard Disk Diag. Track Only):
• Address check and bad sector logic by altering the format on
CYL O, Head O, Sector O, 1 bit at a time and monitoring the
results after a write
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