HP 3000 Manuals HP 3000 Manuals
Determining LDEV1 Disk Space Required for UPDATE
by Annette Alstrom
Commercial Systems Division
CHECKSLT, a new tool useful for planning your system UPDATE disk space
requirements, is now available with this MPE/iX release. In addition,
CHECKSLT can validate any Customized System Load Tape (CSLT) that was
created during a system backup. CHECKSLT is available on the Fundamental
Operating Software (FOS STORE) release tape.
Preparing for a System Release UPDATE
The MPE/iX UPDATE process requires that you reserve some contiguous disk
space on LDEV1 prior to the UPDATE to ensure the new system files will
fit on LDEV1. The amount you need to reserve varies depending on two
factors:
1. The system files that are currently on LDEV1.
2. The files on the SLT that you intend to UPDATE.
CHECKSLT calculates the required contiguous disk space by comparing the
size of each file on the SLT with the size of its corresponding file on
LDEV1. It then reports the total contiguous disk space that needs to be
reserved for the UPDATE.
CHECKSLT can be invoked at any time before the UPDATE while the system is
still servicing users. This way you can know in advance how much
contiguous LDEV1 disk space is needed. You can retrieve the tool and
catalog from the MPE/iX Release 5.0 FOS STORE tape to use it before your
actual MPE/iX Release 5.0 UPDATE. (For specifics, please refer to the
section "Retrieving CHECKSLT" at the end of this article.) During system
preparation time for the UPDATE, when instructed to do so in the HP 3000
MPE/iX Installation, Update and Add-on Manual (36123-90001) , reserve the
amount of contiguous disk space that was reported by CHECKSLT.
Validating a CSLT Created During System Backup
During normal operation after your system has been updated to MPE/iX
Release 5.0, you can use CHECKSLT to validate any CSLT; for example, one
created during a system backup. It will catch any errors on the CSLT,
and also report information for each file on the tape. You can set the
level of detail CHECKSLT reports for the following:
1. Filenames only
2. Filenames and sizes
3. Filenames, sizes, label information, Logical Interchange Format
(LIF) directory data, and so on
Other CHECKSLT Functions
CHECKSLT can also be used to extract a certain file from an SLT or CSLT
or display the contents of an SLT or CSLT file in hexadecimal format.
Retrieving CHECKSLT
To use the new CHECKSLT option for estimating the contiguous disk space
required for your MPE/iX Release 5.0 UPDATE, do the following:
Prior to the UPDATE, mount the MPE/iX Release 5.0 FOS STORE tape, put the
tape drive online, and then type:
:HELLO MGR.TELESUP,MPEXL
:RESTORE *T;CHECKSLT,CKCAT000;SHOW
Then mount the MPE/iX Release 5.0 SLT, put the tape drive online, and
invoke CHECKSLT, type:
:CHECKSLT
At the main menu, choose Option 7, which is described as:
7 - Check the tape and display summary of tape and disk use statistics
After the entire tape has been read and the file sizes are compared, the
estimated amount of contiguous disk space that should be reserved on
LDEV1 is reported.