a*****a
发帖数: 1085 | 1 打算升级macbookpro的硬盘，原装的硬盘准备在网上卖掉。请问怎样能够真正清除硬盘
资料？我知道即使格式化过的硬盘也是可以被恢复的。 | c****3
发帖数: 265 | 2 find some big movie files, like something from Japan, and write to yoru disk
. Erase, then write again, then erase for 7 times.
If you still have the mac, link your disk to Mac, select Disk Utility and "
erase" the disk. Apple OS lets you select your method: 7 times for DoD
standard, or 31 times for insane standard. Quick erase won't be safe.
All in one word: 7 times of erasing. | x****u
发帖数: 12955 | 3
disk
No, you need random bit writing for this to really work.
Best to just write a small program yourself to keep writing out random bits
in a text stream until request disk space function returns with error, run
it at least 7 times.
Most secure option: smash it with a hammer.
【在 c****3 的大作中提到】
: find some big movie files, like something from Japan, and write to yoru disk
: . Erase, then write again, then erase for 7 times.
: If you still have the mac, link your disk to Mac, select Disk Utility and "
: erase" the disk. Apple OS lets you select your method: 7 times for DoD
: standard, or 31 times for insane standard. Quick erase won't be safe.
: All in one word: 7 times of erasing.
| c****f
发帖数: 1102 | 4 打开终端
dd if=/dev/null of=/dev/sda bs=512 count=1
sda改成你的系统盘符
这样这块盘分区表和mbr都打掉了
逻辑上来说 除非人家蛋疼专门找人回复 不然一般人看上去就是空盘 | a*****a
发帖数: 1085 | 5 有问题：这是一个500G的盘，俺选了那个one time writing zero的选项，以为能省点
时间，结果从昨天到今天差不多20个小时，那个进程bar差不多在五分之一的位置，这
个正常么？俺打算停止，点了那个skip，结果现在一个多小时了，还在skipping
disk
【在 c****3 的大作中提到】
: find some big movie files, like something from Japan, and write to yoru disk
: . Erase, then write again, then erase for 7 times.
: If you still have the mac, link your disk to Mac, select Disk Utility and "
: erase" the disk. Apple OS lets you select your method: 7 times for DoD
: standard, or 31 times for insane standard. Quick erase won't be safe.
: All in one word: 7 times of erasing.
| a*****a
发帖数: 1085 | 6 请问这个“系统盘符”是什么？我把原来的盘拿了出来，电脑上已经装好了新盘和新系
统。原来的盘放在一个external enclosure里，接到电脑上显示的是untitled
【在 c****f 的大作中提到】
: 打开终端
: dd if=/dev/null of=/dev/sda bs=512 count=1
: sda改成你的系统盘符
: 这样这块盘分区表和mbr都打掉了
: 逻辑上来说 除非人家蛋疼专门找人回复 不然一般人看上去就是空盘
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