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$001C
Diskette or
p l anar board
$00 1 F
Software error
2 . 9
HA R D D I S K PROBLEMS
Hard disk problems are indicated by error messages on the CRT when the
disk is addressed or are indicated by mechanical faults during the disk
drive operation.
Since the
in response to the programmed dat a , disk problems may be caused by a fau l t
in the disk drive , in the disk drive assemb l y , i n the processor un it , in
the software or data or in the cables .
covers pos s ible mechanical prob l ems involving the hard disk and Section
2 . 9 . 2 , "Fa i lure to Function" addresses pos s ib l e nonmechanical hard disk
problems .
I f you are continuously receiving error mess ages with the hard disks a s
we l l a s the st" and 8 11 diskettes , the fault may be i n the P3 - P800 cab l e .
See Figure 5 - 35 . I f your system i s equipped with disk o r diskette assem
b l ies , dis connecting the P 3 -P800 cable may a l low them to function .
s o , you need to have the cab l e replaced.
check . See Chapter 4 , "Cab l e Checks . "
replacing, the system has to be returned to IBM for repai r .
i s not a customer - replaceable unit .
2 . 9 . 1
MECHAN I C A L FA U L TS
I MPO RTANT:
DO NOT power - o f f the IBM 9000 whi l e the hard disk drive i s
running .
or a l l of your data on the hard disk .
on the IBM 9000 , and then immediately turn on the hard disk
units .
then the IBM 9000 .
Use the s ymptoms l isted on the chart below to isolate a fault to one o r
more CRUs .
Where necessary, you are referred to optional checks in other
Sect ions of the manual to narrow the fault to one CRU .
at the bottom o f each column in the Symptom chart to reference the
Bad format or damaged diskette .
Try another diskette .
pers ists , perform optional
check . See Section 3 . 8 , "Diskette and
Disk Checks . "
Volume identif ier incorrect .
drive
disk
Section 2 . 9 . 1 , "Mechanical Faul t s "
I f you do , you may cause unrecoverable loss o f part
To power o f f , f irst shut down the hard disk units and
controlled
is
by the
The cable a l s o has an optional
I f the P3 - P800 cable should need
To power on, first turn
Use the numbers
Fault Detection 2 - 1 8
I f error
planar
board
I f
The cab l e
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