我已经使用 Ubuntu 12.04 和 Windows 7 有一段时间了。几周前我收到了下面的错误消息，但令人惊讶的是几天后我又能够启动了。昨天它又崩溃了。
Boot Info Script e7fc706 + Boot-Repair extra info [Boot-Info 9Feb2015]
============================= Boot Info Summary: ===============================
============================ Drive/Partition Info: =============================
no valid partition table found
"blkid" output: ________________________________________________________________
Device UUID TYPE LABEL
/dev/loop0 squashfs
/dev/sr0 iso9660 Ubuntu 12.04.5 LTS amd64
========================= "ls -l /dev/disk/by-id" output: ======================
total 0
lrwxrwxrwx 1 root root 9 Jan 18 16:29 ata-MATSHITADVD-RAM_UJ8E2_S_H090_449177 -> ../../sr0
================================ Mount points: =================================
Device Mount_Point Type Options
/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sr0 /cdrom iso9660 (ro,noatime)
ADDITIONAL INFORMATION :
=================== log of boot-repair 2016-01-18__16h55 ===================
boot-repair version : 4ppa35
boot-sav version : 4ppa35
glade2script version : 3.2.2~ppa45~precise
boot-sav-extra version : 4ppa35
boot-repair is executed in live-session (Ubuntu 12.04.5 LTS, precise, Ubuntu, x86_64)
CPU op-mode(s): 32-bit, 64-bit
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
ls: cannot access /home/usr/.config: No such file or directory
=================== os-prober:
=================== blkid:
/dev/loop0: TYPE="squashfs"
/dev/sr0: LABEL="Ubuntu 12.04.5 LTS amd64" TYPE="iso9660"
=================== UEFI/Legacy mode:
This live-session is not in EFI-mode.
SecureBoot maybe enabled.
=================== PARTITIONS & DISKS:
=================== parted -l:
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Error: Can't have a partition outside the disk!
=================== parted -lm:
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Error: Can't have a partition outside the disk!
=================== lsblk:
KNAME TYPE FSTYPE SIZE LABEL
sr0 rom iso9660 758M Ubuntu 12.04.5 LTS amd64
loop0 loop squashfs 712.6M
KNAME ROTA RO RM STATE MOUNTPOINT
sr0 1 0 1 running /cdrom
loop0 1 1 0 /rofs
=================== mount:
/cow on / type overlayfs (rw)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
/dev/sr0 on /cdrom type iso9660 (ro,noatime)
/dev/loop0 on /rofs type squashfs (ro,noatime)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
gvfs-fuse-daemon on /home/ubuntu/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=ubuntu)
=================== ls:
/sys/block/sr0 (filtered): alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight power queue range removable ro size slaves stat subsystem trace uevent
/dev (filtered): autofs block bsg btrfs-control bus cdrom cdrw char console core cpu cpu_dma_latency cuse disk dri dvd dvdrw ecryptfs fb0 fd full fuse hpet input kmsg libmtp-1-2 log mapper mcelog mei mem net network_latency network_throughput null port ppp psaux ptmx pts random rfkill rtc rtc0 sg0 shm snapshot snd sr0 stderr stdin stdout uhid uinput urandom v4l vga_arbiter vhci vhost-net video0 zero
ls /dev/mapper: control
=================== df -Th:
Filesystem Type Size Used Avail Use% Mounted on
/cow overlayfs 3.9G 169M 3.7G 5% /
udev devtmpfs 3.9G 12K 3.9G 1% /dev
tmpfs tmpfs 787M 856K 787M 1% /run
/dev/sr0 iso9660 758M 758M 0 100% /cdrom
/dev/loop0 squashfs 713M 713M 0 100% /rofs
tmpfs tmpfs 3.9G 32K 3.9G 1% /tmp
none tmpfs 5.0M 4.0K 5.0M 1% /run/lock
none tmpfs 3.9G 600K 3.9G 1% /run/shm
=================== fdisk -l:
Error: no partitions
=================== Suggested repair
The default repair of the Boot-Repair utility would not act on the boot.
=================== User settings
The settings chosen by the user will not act on the boot.
pastebinit packages needed
W: Duplicate sources.list entry cdrom://Ubuntu 12.04.5 LTS _Precise Pangolin_ - Release amd64 (20140807.1)/ precise/main i386 Packages (/var/lib/apt/lists/Ubuntu%2012.04.5%20LTS%20%5fPrecise%20Pangolin%5f%20-%20Release%20amd64%20(20140807.1)_dists_precise_main_binary-i386_Packages)
W: Duplicate sources.list entry cdrom://Ubuntu 12.04.5 LTS _Precise Pangolin_ - Release amd64 (20140807.1)/ precise/restricted i386 Packages (/var/lib/apt/lists/Ubuntu%2012.04.5%20LTS%20%5fPrecise%20Pangolin%5f%20-%20Release%20amd64%20(20140807.1)_dists_precise_restricted_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
dpkg-preconfigure: unable to re-open stdin: No such file or directory