Backup IBM AIX Server


The following steps helped me to backup AIX 5.3 and AIX 6.1 servers.

1st of all, we need to remove the system limits to allow us to create a large file, our backup.

Click here for more information here on IBM website


Edit the limits file:

vi /etc/security/limits

Allow root user to create unlimited file size by adding “fsize = -1” in its own section:

    fsize = -1

We can now run our backup using smitty:

smitty mksysb

Fill in the path in the first field and change next options if needed. Press Enter to start the backup.


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