Such, when occurrence physics of a certain disk damages, the operating system can cause image disk automatically to replace the disk of invalidation, those who assure a database is normal move.

这样，当某个磁盘出现物理损坏时，操作系统会自动引发映像磁盘来取代失效的磁盘，保证数据库的正常运行。

youdao

The easiest approach would be simply to replace all regular disk drives with SSDs and move over all objects and data.

最简单的方法是用SSD替换所有常规硬盘驱动器并移动所有对象和数据。

youdao

Replace two 80gb disks with one 160gb disk without the need to bring the system offline or manually move data between disks.

用一个160gb磁盘替换两个80gb磁盘，而不需要让系统离线，也不需要在磁盘之间手工转移数据。

youdao

Computer DVD devices "may never completely replace the disk drive and floppy disks because access time will always be slower on DVD, " he says.

CNN: ASIANOW - Asiaweek

Now in the instance that you get a bad disk or no disk, you can take it back and they will replace it with the same item.

FORBES: Why Best Buy is Going out of Business...Gradually