GE CT-9800

GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 1 Direction 18000
8-5-6
9 Illegal command The drive received an illegal read/write or position command. Command may
have been received while the Servo Head was offset or seeking.
10 Power fault The power malfunctioned, possibly with undervoltage on the DG Logic
power supply.
11 Pack unsafe A condition occurred which imperiled the heads and the pack and an interlock
opened.
12 Positioner fault The head positioner malfunctioned (the positioner probably overtraveled during a
seek, or moved during a read or write).
13 Clock fault The servo clock malfunctioned (possible loss of phase lock loop during
servo motion).
14 Write fault The write or head select circuits malfunctioned (write was too short or too long;
or write with more than one or no heads selected).
15 Drive fault Any of the above faults (bits 8-14)
For more information on programming DIA & DIB type commands, refer to the Programmers Reference Manuals,
located in the S/140 Manual Volume #2, Parts 1 thru 3.
(ZEBRA DTOS ONLY)
2. To check pack/software integrity.
The easiest way to check the pack is to run the drive with a known good pack if available. The integrity of
the disk pack is checked very thoroughly during format and initialize procedures (6 passes of ZDKP
FMTR and 5 patterns of DISK INIT) which test the pack and flag any bad blocks. If these bad blocks are
not flagged and entered into the bad block table, software and data may be written into bad locations and
lost. The format and initialize procedures are described as part of the software load in Chapter 4 -
Functional Checks of the CT 9800 Quick System Manual (Direction 18000).
3. Diagnostic Programs for the Disk Drive are the formatter (ZDKP FMTR), reliability (ZDKP RELI), and
diagnostic (ZDKP DIAG) programs. The formatter lays out the block structure on the disk pack and thru
checks for bad blocks. The reliability program runs the disk drive under worst- case conditions to force
any marginal errors to occur. The diagnostic tests for errors in a manner that helps to identify the cause
of the error.
Abstracts and operating instructions for these programs may be found in the DTOS Manual Volume #1,
Part 3. A common use of the formatter and reliability programs may be found in Chapter 4 - Functional
Checks, of the CT 9800 Quick System Manual (Direction 18000).
(ARGUS ADES ONLY)
2. The Argus formatter program will destroy all contents of the disk pack and therefore the formatter
program should only be run as a last resort. The following are some general considerations and
guidelines since the program 6239 _FMTR has various functions other than strictly formatting:
For information on the 6239_FMTR program, refer to Data General Volume 13 “Maintenance Service
Guide”. The information given for the 6236_FMTR program is accurate for the 6239_FMTR program.
However, the diagnostic program 6236_FMTR is not present on the distribution tape because it applies
only to controller that is not used in the GE Argus configuration. The updated version of that program is
6239_FMTR.