Communicator 3000 MPE/iX Release 6.0 (Platform Software Release C.60.00) (30216-90269)

Chapter 2 29
System Information and Preparation
Planning Your Move to MPE/iX Release 6.0
Estimate additional disk space requirements based on the number and
kind of software subsystem products purchased. If you are not
adding-on any new purchased products, the disk space sectors currently
being used by your existing products will probably not change
significantly.
Converting Between Disk Sectors and MBytes
If your products are listed in MBytes, particularly third-party products,
estimate the disk space sectors by performing the following conversion:
• n MBytes x 1,000,000 sectors/256 bytes = m sectors
where:
• n = the number of MBytes
• m = the number sectors
Example 1. MBytes to sectors:
•IfVALIDATE reports 20 MBytes total on a tape:
• 20 x 1,000,000/256 = 78,125 sectors
Example 2. Sectors to MBytes:
• If a disk has a device size of 7,824,336 sectors:
• 7,824,336 x 256/1,000,000 = 2,003 MBytes
• Therefore the disk is a 2000 MByte disk, (also known as 2 Gbyte
disk).
For a closer estimate, use the value 1,048,576 instead of the value
1,000,000.
For a quick estimate, use the value 4,000 instead of the conversion
value of 1,000,000/256.
Contiguous Disk Space Requirements
The maximum amount of contiguous disk space sectors required to
complete a system modification on any system is:
• 120,000 sectors
Use CHECKSLT to estimate the amount of contiguous disk space sectors
required to complete a system modification on your system.
Refer to the HP 3000 MPE/iX System Software Maintenance Manual
for directions on using CHECKSLT.