debian sid amd64完全崩溃, kerel panic - not syncing

[Star Liu <minxinjianxin@gmail.com>]

昨天和前天起系统就不稳定了，就是启动的时候就进入maintain mode，然后我用fsck
/dev/sda4修复系统，完了就可以重起进系统了，这样修复了3次后，今天早上系统就彻底崩溃了，连maintain mode都进不去了。
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begin: mounting root file system.... begin:running /scripts/local-top ... done.
begin: running /scripts/local-premount... done
kjournald starting. commit interval  5 seconds
ext3-fs:mount filesystem with ordered data mode.
begin:running /script/local-bottom... done
done.
begin:running /script/init-bottom...done
mount:mounting /sys on /root/sys failed: invaild argument
run-init:/sbin/init:I/O error
kernel panic - not syncing:attempted to kill init!
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请教怎样才能修复系统呢？