And so this is why in problem set 5 last year when I took photographs on campus with a compact flash card, just standard consumer media and I accidentally formatted that compact flash card, I only lost the first few kilobytes, the first few thousand bits on that compact flash card.

这也是去年的套题5中,我们在校园里面用配有，简易闪存卡的标准摄像机拍照片,我不小心格式化了这个简易闪存卡,其实我只是丢失的最开头的几千个字节的数据。

哈佛公开课 - 计算机科学课程节选

We judge CD-RW packet-writing performance by copying a folder containing 100MB of files to a CD-RW disc three times: first to the newly formatted blank disc, again after deleting the files from the first copy operation, and finally by overwriting the files from the second operation.

CNN: Top 5 CD-rewritable drives