无法在 Virtual box 中启动 ubuntu 15.04

Question

安装很顺利。但是在第一次重新启动后，发行版无法启动。这就是我在屏幕上看到的一切

Virtual box 版本为 4.3.28 r100309（截至撰写本文时的最新版本）

这是 vbox 设置：

$ VBoxManage  showvminfo "LinuxDesktop15"                                                                                              
Name:            LinuxDesktop15
Groups:          /
Guest OS:        Ubuntu (64 bit)
UUID:            8bfd870e-f770-429d-bbfc-13b26dffc81d
Config file:     /Users/antkong/VirtualBox VMs/LinuxDesktop15/LinuxDesktop15.vbox
Snapshot folder: /Users/antkong/VirtualBox VMs/LinuxDesktop15/Snapshots
Log folder:      /Users/antkong/VirtualBox VMs/LinuxDesktop15/Logs
Hardware UUID:   8bfd870e-f770-429d-bbfc-13b26dffc81d
Memory size:     512MB
Page Fusion:     off
VRAM size:       16MB
CPU exec cap:    100%
HPET:            off
Chipset:         piix3
Firmware:        BIOS
Number of CPUs:  1
PAE:             off
Long Mode:       on
Synthetic CPU:   off
CPUID overrides: None
Boot menu mode:  message and menu
Boot Device (1): Floppy
Boot Device (2): DVD
Boot Device (3): HardDisk
Boot Device (4): Not Assigned
ACPI:            on
IOAPIC:          on
Time offset:     0ms
RTC:             UTC
Hardw. virt.ext: on
Nested Paging:   on
Large Pages:     on
VT-x VPID:       on
VT-x unr. exec.: on
State:           running (since 2015-06-16T01:36:17.297000000)
Monitor count:   1
3D Acceleration: off
2D Video Acceleration: off
Teleporter Enabled: off
Teleporter Port: 0
Teleporter Address: 
Teleporter Password: 
Tracing Enabled: off
Allow Tracing to Access VM: off
Tracing Configuration: 
Autostart Enabled: off
Autostart Delay: 0
Default Frontend: 
Storage Controller Name (0):            IDE
Storage Controller Type (0):            PIIX4
Storage Controller Instance Number (0): 0
Storage Controller Max Port Count (0):  2
Storage Controller Port Count (0):      2
Storage Controller Bootable (0):        on
Storage Controller Name (1):            SATA
Storage Controller Type (1):            IntelAhci
Storage Controller Instance Number (1): 0
Storage Controller Max Port Count (1):  30
Storage Controller Port Count (1):      1
Storage Controller Bootable (1):        on
IDE (1, 0): /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso (UUID: 4dbd5fce-db20-4eba-b0ac-e5593aadb08f)
SATA (0, 0): /Users/antkong/VirtualBox VMs/LinuxDesktop15/LinuxDesktop15.vdi (UUID: 5249358d-1608-4f71-851c-5dbd75dd059a)
NIC 1:           MAC: 08002708DCB0, Attachment: NAT, Cable connected: on, Trace: off (file: none), Type: 82540EM, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: deny, Bandwidth group: none
NIC 1 Settings:  MTU: 0, Socket (send: 64, receive: 64), TCP Window (send:64, receive: 64)
NIC 2:           disabled
NIC 3:           disabled
NIC 4:           disabled
NIC 5:           disabled
NIC 6:           disabled
NIC 7:           disabled
NIC 8:           disabled
Pointing Device: USB Tablet
Keyboard Device: PS/2 Keyboard
UART 1:          disabled
UART 2:          disabled
LPT 1:           disabled
LPT 2:           disabled
Audio:           enabled (Driver: CoreAudio, Controller: AC97)
Clipboard Mode:  disabled
Drag'n'drop Mode: disabled
Session type:    GUI/Qt
Video mode:      720x400x0 at 0,0
VRDE:            disabled
USB:             enabled
EHCI:            enabled

USB Device Filters:

<none>

Available remote USB devices:

<none>

Currently Attached USB Devices:

<none>

Bandwidth groups:  <none>

Shared folders:  <none>

VRDE Connection:    not active
Clients so far:     0

Video capturing:    not active
Capture screens:    0
Capture file:       /Users/antkong/VirtualBox VMs/LinuxDesktop15/LinuxDesktop15.webm
Capture dimensions: 1024x768
Capture rate:       512 kbps
Capture FPS:        25

Guest:

Configured memory balloon size:      0 MB
OS type:                             Linux26_64
Additions run level:                 1
Additions version:                   4.3.22_Ubuntu r98236


Guest Facilities:

Facility "VirtualBox Base Driver": active/running (last update: 2015/06/16 01:36:42 UTC)
Facility "Seamless Mode": not active (last update: 2015/06/16 01:36:42 UTC)
Facility "Graphics Mode": not active (last update: 2015/06/16 01:36:42 UTC)

问题是什么？

Answer 1

你的屏幕上清楚地写着：

   blk_update_request: I/O error, dev sr0, sector....

Linux 中的dev sr0是 CD/DVD 读取器。这意味着您的虚拟机尝试的不是从硬盘（它可能所在的位置）读取squashfs，而是从CD/DVD 磁盘读取squashfs，这可能是您在安装过程中设置的。

您应该更改引导顺序，使 HDD 优先于任何内容。但您还应该确保 HDD 存在，并且它是可引导的，因为标准程序是，如果没有找到 CD/DVD，则引导过程应该毫不犹豫地继续到 HDD，事实上这并不让我怀疑硬盘不存在或无法启动。

无论如何，您可以使用安装介质（USB 或 CD/DVD）执行任一操作：从它启动，然后选择：尝试 Ubuntu而不安装它。