我知道这个问题很普遍，但有时是特殊情况。
我用dd if=/dev/zero of=/dev/sda bs=4M来修复有很多坏块的HDD。 （我正在使用Ubuntu live USB）。
所有8个分区（其中3个是大分区，1个Windows，1个linux和1个要存储的分区）丢失了。
我想尝试至少恢复存储分区甚至其中的某些特定目录。
我使用-a选项在/ dev / sda上尝试了grep，但出现了此错误grep: memory exhausted。
此外，我无法安装最前版本或ddrescue。对于这最后一个，我收到了此消息
$ sudo apt-get install -f ddrescue-gui
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
ddrescue-gui : Depends: python3-wxgtk4.0 but it is not installable
Depends: gddrescue but it is not installable
E: Unable to correct problems, you have held broken packages.
但是即使安装lzip，我也会遇到错误。
我需要从那里至少获取1个最近的文件夹。
您能帮我吗？
预先感谢