It doesn't happen often, but I have seen several occasions where a restore of a queue manager failed because the backup set was unusable.

虽然由于备份集不可用而导致队列管理器恢复失败的情况不常发生，但是我还是看到过几次这样的情况。

youdao

A few quick facts about offline backup can be seen here.

关于离线备份有几点应该记住。

youdao

Backup strategy: Most of the best practice documents I have seen, including the IBM Redbook on the subject, recommend backing up the files under the queue manager.

备份策略：我看到过的大多数最佳实践文档，包括关于该主题的IBM红皮书，都建议备份队列管理器下的文件。

youdao

So it should be no surprise that the backup industry is massive, as seen with the substantial revenues from Symantec (NASDAQ:SYMC).

FORBES: Quorum Nabs $11 Million To Disrupt The Backup Market

Long story short, the upgrade runs into complications, data is lost, and without a backup to revert to, untold thousands of Sidekick users get shafted in an epic way rarely seen in an age of well-defined, well-understood IT strategies.

ENGADGET: Sidekick failure rumors point fingers at outsourcing, lack of backups