December 2017
Intermediate to advanced
434 pages
10h 14m
English
Content preview from SQL Server 2017 Administrator's Guide
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Backup reliability
Everything saved on disk could be somehow broken or unreadable. That's why SQL Server provides you with two features to improve backup reliability. The first option is to use backup with the CHECKSUM option. This option of backup is very simple to use and causes computation of checksum value on backup completion. This value is saved in the backup and, when we prepare for the restore process, we can test backup readability using the CHECKSUM option:
BACKUP DATABASE <database name> TO DISK = '<path to file>'WITHCHECKSUM
Another option is to distribute backups across more devices. It's called mirrored backup. Mirrored backup is an enterprise feature of SQL Server and, when it's used, two identical backups are written synchronously ...
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