HP StoreEver MSL2024, MSL4048, MSL8048, and MSL8096 Tape Libraries User and Service Guide (AK378-96059, December 2012)

Figure 111 Removable Storage service
5. Right-click Removable Storage again and select Properties.
6. Change the Startup type to Disabled and click OK.
Stop as many programs as possible while a backup or restore is in progress. Be especially aware
of monitoring applications, such as anti-virus software, which check every file that is read. If you
are concerned about viruses and backup performance, perform a virus scan before starting the
backup, and shut down the anti-virus software while the backup is running.
Novell
You might need to tweak some Novell operating system parameters to achieve good backup
performance.
• The MAXIMUM PACKET RECEIVE BUFFERS and MINIMUM PACKET RECEIVE BUFFERS
parameters may need to be increased (if currently maxed out, try setting the MINIMUM to the
current MAXIMUM and then double the value for the MAXIMUM on the backup server and
any remote servers that are backed up).
• The MAXIMUM DIRECTORY CACHE BUFFERS and MINIMUM DIRECTORY CACHE BUFFERS
parameters may need to be increased (if currently maxed out, try setting the MINIMUM to the
current MAXIMUM and then double the value for the MAXIMUM on the backup server and
any remote servers that are backed up.)
• Set TCP DELAYED ACKNOWLEDGEMENTS to OFF.
• Since Novell volumes may be compressed, hardware compression may lower the performance
and capacity. If the volumes are compressed, make sure that the backup software does not
uncompress the data on read and has hardware and software compression disabled.
NOTE: Disabling the hardware compression should not be necessary on LTO drives as they
sense the compression ratios and can automatically adjust if they receive non-compressable
data.
• Stop as many programs as possible while a backup or restore is in progress. Be especially
aware of monitoring applications, such as anti-virus software, which check every file that is
read. If you are concerned about viruses and backup performance, perform a virus scan
before starting the backup, and shut down the anti-virus software while the backup is running.
Backup server
The backup server must have enough RAM and processor power to transfer the files from the disk
to the tape drive. See “Backup server requirements” (page 157) for the minimum RAM and CPU
speed needed for each tape drive. In some cases, a multi-processor server may be required.
156 Troubleshooting