HP e3000 MPE/iX Release 6.0 System Software Maintenance Manual (30216-90272)

Appendix C 189
Managing Disk Space
Using Alternative Disk Space Allocation
Using Alternative Disk Space Allocation
Before starting UPDATE, reserve contiguous disk space in the file AXLDEV1.PUB.SYS. This
amount is at least 60,000 sectors but may be larger. The prudent way to reserve this space
is in one contiguous block. Reserving this space in more than one block introduces a risk
that Secondary Storage Manager (SSM) will allocate space for files on LDEV 1 in a way
that causes an “Out of contiguous disk space” condition during UPDATE. Always try to
reserve this contiguous disk space for UPDATE in one block.
However, if you cannot reserve all the disk space in one file on LDEV 1, the additional disk
space required beyond 60,000 sectors can be reserved in large contiguous sectors. The
minimum size of any contiguous sector piece must be 30,000 sectors.
NOTE
Consult your HP Representative or the Response Center before you use this
method to allocate disk space. Your operating system is at risk of LDEV1
overflow while running. Performance will be impacted. The operating system
requires room to work. If it does not have enough, the resource manager will
start to shut your system down.
To reserve disk space sectors in sections:
1. For each section of 60,000 to 30,000 sectors:
:build axldev1 disk = 60000
:build axldev2 disk = 30000
:build axldevn disk = 30000
. . .
The minimum number of sectors for at least one section is 60,000. All other sections
must be at least 30,000 sectors each.
2. Purge each axldev file you created. For example:
:purge axldev1
:purge axldev2
:purge axldev3
3. During the UPDATE, you will receive a disk space error message. Select OVERRIDE at
the disk space warning to continue with the process.
WARNING: UPDATE tried to find 60,000 sectors of contiguous disk
space on LDEV1 for its work, but it could only find
nnnnnnn
sectors. Before continuing, refer to the Installation Manual for
instructions on collecting enough contiguous space on LDEV1 for
the update. If you still have questions after attempting the
procedures outlined in the manual, call your HP support
representative for help.
You may override this warning and continue with the update, but
HEWLETT-PACKARD STRONGLY DISCOURAGES THIS COURSE OF ACTION.
DO NOT override this warning unless you have a full backup