backups

We don't see this as much of a headache, because data backups should be performed regardless of whether you're switching to a new OS.
我们不认为这些操作过于让人头痛，因为无论切换到新操作系统与否，数据备份都应该进行。
For a delta backup, you need to maintain all the backups taken since the last full backup in order to be able to reconstruct the data.
对于差异备份，需要维护自上次完全备份以来采取的所有备份，以便能够重构数据。
Keeping incremental backups of the system's important (and user) files is an important way of preventing this sort of disaster.
保存系统中重要（以及用户）文件的增量备份是防止这种灾难出现的一种重要方法。
For data and differential backups ( and for log backups containing bulk-logged operations ) , roll forward must go at least up to this LSN.
对于数据备份和差异备份（以及包含大容量日志操作的日志备份），必须至少前滚到此LSN。
Testing your strategy by restoring a set of backups and recovering your database prepares you to respond effectively to a disaster.
通过还原一组备份并恢复数据库来测试您的策略，为有效地应对灾难做好准备。
As a DBA, it is often necessary for you to create backups of databases.
With log backups , you can recover the database to the point of failure or to a specific point in time.
使用事务日志备份，可以将数据库恢复到故障点或特定的时间点。
Log backups on the different databases can be created independently of each other and do not have to be simultaneous.
可以对不同的数据库独立创建各日志备份，而无需同时创建。
In the case of a failure on Saturday, you could restore the first Sunday full backup and apply the delta backups from Monday until Saturday.
在星期六出现失败的情况下，您可以恢复第一个星期天的完全备份，并应用星期一到星期六的delta备份。
Backups at each stage of your migration enable you to rollback to a specific point in time of your migration process.
通过在迁移的每个阶段都进行备份，您可以回滚到迁移过程中的任何特定时点。