Installation Manual

18 Introduction and preparation basics
Total storage space on file systems or volumes that are assigned to FSE disk buffer should be at least
10% of total storage space on all HSM files systems in the FSE implementation.
Each file system or volume assigned to FSE disk buffer should be at least twice as large as the largest
file that will be put under FSE control.
Additionally, if you plan to perform a duplication of FSE media, the following prerequisite must be fulfilled:
At least one of the file systems or volumes assigned to FSE disk buffer should be at least twice as large
as the total storage space on the largest FSE medium.
For example, to enable duplication of a 100 GB medium, each file system or volume assigned to the
FSE disk buffer should have at least 200 GB of storage space.
Storage space for FSE debug files
The /var/opt/fse/log/debug directory holds optional FSE debug files. These files contain large
amount of data and can grow very fast. In order to prevent them filling up the /var/opt/fse file system,
you need to make the directory /var/opt/fse/log/debug a symbolic link to a directory outside the
file system for /var/opt/fse. For example, you can make the symbolic link point to one of the following
directories:
/var/log/FSEDEBUG
/tmp/FSEDEBUG
The directory /tmp can be used only if it provides large storage space and is not part of the root file
system, that is: if a separate file system is mounted to /tmp.
Creating symbolic links is done after you create and mount the required file systems.
NOTE: If there is enough disk space that is not yet partitioned, you can also make a new partition for the
debugs, create an Ext3 file system on it, and mount it on /var/opt/fse/log/debug.
You need to add a line to the /etc/fstab file, for example
/dev/mynewdebugpart /var/opt/fse/log/debug ext3 defaults 1 2