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Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

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Restoring<br />

system files<br />

Appendix F: Basic Troubleshooting<br />

Restoring system files<br />

• filenum = a file number, indicating the position on the backup tape.<br />

For example, if this is the second file system on the tape the value for<br />

this parameter should be 1 (the first file system will be at position 0). For<br />

more information on how this parameter is used, see “Performing an<br />

incremental restore via the do.restore script” on page 643.<br />

This command backs up the /usr file system to the “no rewind” tape device<br />

(usually /dev/nrst0) and labels it.<br />

You will see a “DUMP IS DONE” message for each file system. When the<br />

backup is complete, the # prompt appears.<br />

6 When you have finished all incremental backups, rewind and eject the DAT<br />

by entering the following command:<br />

mt o<br />

7 Label the tape, indicating the type <strong>of</strong> backup, date, and time. You should<br />

also record the file systems that were backed up along with the<br />

corresponding file number (filenum) and mount point in case the file system<br />

order changes over time.<br />

8 Reboot the system to the Operational kernel by entering the following<br />

command:<br />

shutdown -r now<br />

In the unlikely event that your <strong>Sidewinder</strong> <strong>G2</strong>’s hard disk needs to be replaced,<br />

you will need to restore the file system that you have backed up. You will also<br />

need to do a full system restore if you add hardware (for example, memory or<br />

disk space) to your active <strong>Sidewinder</strong> <strong>G2</strong>.<br />

The restore process allows you to restore your <strong>Sidewinder</strong> <strong>G2</strong> to your last level<br />

0 backup without reconfiguring your system.To do this, follow the instructions in<br />

“Performing a full system restore” on page 642. Then use the procedure in<br />

“Performing an incremental restore via the do.restore script” on page 643 to<br />

restore files from your incremental backup tapes.<br />

When you restore files, they are automatically restored with the correct Type<br />

Enforcement properties.<br />

The <strong>Sidewinder</strong> <strong>G2</strong> provides the capability to restore files from a full system<br />

backup (Level 0) or incremental backup tape. Table 43 explains some<br />

differences between these two methods.<br />

641

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