iSCSI for TL-Series Tape Libraries
SEPTEMBER 2008
technologies, which require multiple requests and acknowledgments between the media server
and the remote server.
1.
On the navigation bar, click the arrow next to Backup.
2.
Click New Backup Job.
3.
On the View by Resource tab, right-click the computer that you want to install the Remote
Agent and the AOFO to, and then click Install Remote Agent/Advanced Open File Option.
4.
On the Installation wizard, click Next.
5.
On the Remote Computer Logon Credentials panel, complete the options as follows:
Username, password, domain
7.
Click OK.
8.
In the Features pane, click the options that you want to install, and then click Finish.
9.
When the Publish Remote Agent Information dialog box appears, enter the appropriate
information to publish the remote agent to the media server
10. Click OK.
11. Click Next.
12. Read the installation review, and then click Install.
13. The Remote Installation Status dialog box appears, and selected options are installed on
the remote computer.
14. When the installation status indicates that the reboot is complete, right-click the server
name again, and click View Install Log or View Push Log.
15. When the installation is complete, click Next, and then click Finish.
Backup Strategy
Now that the installation is complete, it is time to determine what backup strategy will meet
your needs. The first step in determining an appropriate backup strategy is defining the
backup windows for each system and identifying the amount of data to be protected. With
Backup Exec, there are two backup strategies that can be implemented, traditional backup to
tape or continuous backup to disk.
Traditional Backups – Traditional or scheduled backups to tape have proven to be an effec-
tive and inexpensive means for data protection and recovery. The key benefits of traditional
tape backups include:
•
Inexpensive medium to store data
•
Portable format that can easily be moved offsite
•
Familiar to administrators, who know and understand tape backups
For the purposes of this white paper, we use a traditional backup strategy to a Dell PowerVault
TL-Series tape library and it is assumed that the backup window is 16 hours and the amount of
data to be backed up is approximately 70 GB per system.
Implementing the Strategy within Backup Exec
A Dell PowerVault TL2000 can accommodate up to 2 tape drives (2U) and a TL4000 can ac-
commodate up to 4 tape drives (4U) and backup jobs can be created to utilize each drive in the
tape library. For this environment, we will be running a full backup on every Sunday night of
the week and incremental backups throughout the week to ensure adequate data protection.
Incremental backups store only the changes made from the last full or incremental backup job.
Incremental backups are used during the week to minimize the backup of duplicate or un-
changed data. Since you must restore the last full backup and all following incremental back-
ups to restore lost data, it is recommended that full backups are performed once a week. An-
other option is to use differential backups, which store the changes made from the last full
backup job, during the week instead of incremental backups. This would further reduce the
restore time, but could also result in more duplication of unchanged data and longer backup
windows during the week.
The steps for creating the full backup job include:
•
Select Backup -> New Backup Job from the Backup Exec User Interface. The backup
job selection list will appear.
•
Select the resources from the first 5 systems that need to be protected. In this example,
the C: drive is being selected for each system.
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