OpenVMS image backup reports arithmetic trap, integer divide by zero
Problem
"BACKUP/IMAGE" command results in "arithmetic trap / integer divide by zero" error message.
Example:
|
Affected OpenVMS versions:
OpenVMS 6.2-1H3 and below
- VAX/VMS 6.2-1H3 and below
Affected Charon versions:
- CHARON-AXP version 4.3 build 14600
- Solved starting with CHARON-AXP V4.3 build 14601
- V4.4 build 14802 and above are not affected
- CHARON-VAX / Linux below build 12100
- Solved starting with CHARON-VAX build 12100
Solution
This is related to disk size limitation and geometry
Default geometry is set to 63 sectors per track and 63 tracks per cylinder
- Disk images and physical disks can then be used without any issue if their size is less than 128GB
For disk images and physical disks larger then 128GB and up to 2TB, override disk geometry from the configuration file as follows:
set <controller-name> geometry[<unit-no>] = "255/255"
Example (for DKA100):
set PKA geometry[100] = "255/255"
.
Use the "$ SHOW DEVICE <disk> /FULL"
command to get disk geometry information
Example:
... |
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