HP e3000 MPE/iX Release 7.0 System Software Maintenance Manual (30216-90317)

Chapter 3 71
Planning for Your Task
3.6 Estimating Disk Space
Record the estimated disk space required for SUBSYS products on your checklist.
Disk Space Estimate for PowerPatch or Express
The disk space required is listed in the section, “Disk Space Requirements,” in the
Read Before Installing
that comes with the PowerPatch or Express media.
Record the disk space required for the PowerPatch or Express on your checklist.
Disk Space Estimate for Reactive Patch
Reactive patches vary extensively in the amount of disk space they require. Reactive
patches usually replace existing files, and the increase in disk space is very little. If you
want to make a worst case estimate for disk space, use the amount of disk space used by
the reactive patch and add that to the disk space requirement for LDEV 1.
Record the estimated disk space required for Reactive patches on your checklist.
Disk Space Estimate for Staging Areas
When you have created a staging area on your local system, you can distribute that
staging area to a remote system, provided the two systems match. Both systems must
match OS versions, relevant SUBSYS products, and applied patches.
To estimate the amount of disk space required on the remote system for a staging area
that resides on your local system:
1. Log onto the local system.
2. Start HP Stage/iX.
:STAGEMAN
STAGEMAN>
3. Execute the disk use command.
STAGEMAN>DU staging_area_name
where staging_area_name is the name of the staging area you want to distribute.
The return lists the amount of non-contiguous disk space used by the staging area.
Record the estimated disk space required for the staging area on your checklist.
Converting Between Disk Sectors and MBytes
If your products are listed in MBytes, particularly third-party products, calculate the disk
space sectors by performing this conversion:
n Mbytes × 1,000,000 sectors/256 bytes = m sectors
where:
n -the number of Mbytes
m -the number of sectors
• Example of MBytes to sectors:
If VALIDATE reports 20 Mbytes total on a tape: