正要歸檔一個硬碟，因為它來自商店，然後在上面添加我自己的作業系統，並且考慮到它是打折購買的二手演示機，硬碟可能在幕後不乾淨，所以我選擇先運行ntfswipe （因為0x0000000000000000壓縮得非常好，duh），
root@xubuntu:/home/xubuntu# ntfswipe -a /dev/nvme0n1p3
ntfswipe is about to wipe:
unused disk space
file tails
unused mft areas
unused directory index space
the logfile (journal)
the pagefile (swap space)
undelete data
ntfswipe will overwrite these areas with: 0x00
(however undelete data will be overwritten by random values)
ntfswipe will begin in 5 seconds, press CTRL-C to abort.
wipe_directory 0x00, 65016584 bytes
wipe_tails 0x00, 221482103 bytes
wipe_logfile 0xff, 67108864 bytes
wipe_mft 0x00, 187170816 bytes
wipe_pagefile 0x00, 5368709120 bytes
wipe_unused 0x00, 460829704192 bytes
wipe_undelete
466739191679 bytes were wiped (excluding undelete data)
這裡的問題是，正如標題所述，為什麼它說：
(however undelete data will be overwritten by random values)
？當其他所有內容都寫入 0x00 或 0xFF 時，為什麼取消刪除的資料看起來是隨機的？