Computer Associates BABNWUP900NE6 Administration Guide - Page 78

Global Options Distinguish Media by Name Only BrightStor ARCserve Backup writes to any media that has the name specified in the Media text box on the Destination tab, regardless of the media's ID or sequence number. This option is useful if you are running a repeating Overwrite job with a specific media and you want to ensure that the same media is used for the job each time. ■ When you enable this BrightStor ARCserve Backup looks for a media that has the name specified in the Media text box and uses it, regardless of the media's other identifying features. ■ When you do not enable this option, the second time the backup job is run, BrightStor ARCserve Backup cannot always locate the original tape because some of its identifying features will have changed. Note: If two or more media in the tape library have the same name, BrightStor ARCserve Backup uses the first media in the device group that matches the specified name. Therefore, we do not recommend that you use this option to perform a single occurrence overwrite. Verification Options BrightStor ARCserve Backup allows you to verify that your data was correctly backed up to media. You can verify data for the entire backup job or for a selected drive in your backup job. The global verification options (applied to the entire job) will be overridden by the options selected for a drive. BrightStor ARCserve Backup provides the following options for verification: ■ None-The back up will not be verified. ■ Scan Backup Media Contents-Check the proprietary BrightStor ARCserve Backup data area (the header) of each file on the backup media. If it is readable, BrightStor ARCserve Backup assumes the data is reliable. If it is not readable, the Activity Log is updated with this information. This is the fastest verification method. If you selected Calculate and Store CRC Value on Backup Media on the Operation tab, BrightStor ARCserve Backup automatically performs CRC verification. This method assigns a value to the data that you copied to media and compares it to the value assigned to the data that you backed up. This enables you to identify the individual data packets that were backed up. ■ Compare Backup Media to Disk-Data from the backup media is read and compared byte for byte against the source files. This option takes time, but ensures that all data on the backup media are exactly as on the disk. If BrightStor ARCserve Backup finds a mismatch, the errors are recorded in the Activity Log. 3-16 Administrator Guide