在XEN中安装guest os时如何换ISO

edisonmar

在XEN中完全虚拟化一个机器(我机器支持VT的),我用本地一个目录中的ISO文件,但是系统通常都是有多个ISO的,在第一个ISO安装完之后提示换第二张光盘,应该怎么换呢?本来想可能过一段时间他就可以自己换了,可是还是不行.想SHUTDOWN了换个路径,但是失败了,SHUTDOWN就起不来了.在网上找了很多也不知道到底怎么做,所以来麻烦大家了,望帮忙.

另外加一问如何用XEN复制本虚拟平台的系统?

MichaelBibby

Hi, 换 ISO 的问题，可以试试 xm 的 block-attach 和 block-detach参数。具体请看：

1. 
   
2. $ man xm
   

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在 man 手册里给出了例子的：

1. 
   
2. block-attach domain-id be-dev fe-dev mode [bedomain-id]
   
3.            Create a new virtual block device.  This will trigger a hotplug event for the guest
   
4.            OPTIONS
   
5. 
   
6.            domain-id
   
7.                The domain id of the guest domain that the device will be attached to.
   
8. 
   
9.            be-dev
   
10.                The device in the backend domain (usually domain 0) to be exported.  This can be specified
    
11.                as a physical partition (phy:sda7) or as a file mounted as loopback
    
12.                (file://path/to/loop.iso).
    
13. 
    
14.            fe-dev
    
15.                How the device should be presented to the guest domain.  It can be specified as either a
    
16.                symbolic name, such as /dev/hdc, for common devices, or by device id, such as 0x1400
    
17.                (/dev/hdc device id in hex).
    
18. 
    
19.            mode
    
20.                The access mode for the device from the guest domain.  Supported modes are rw (read/write)
    
21.                or ro (read-only).
    
22. 
    
23.            bedomain-id
    
24.                The back end domain hosting the device.  This defaults to domain 0.
    
25. 
    
26.            EXAMPLES
    
27. 
    
28.            Mount an ISO as a Disk
    
29.                xm block-attach guestdomain file://path/to/dsl-2.0RC2.iso /dev/hdc ro
    
30. 
    
31.                This will mount the dsl iso as /dev/hdc in the guestdomain as a read only device.  This
    
32.                will probably not be detected as a cdrom by the guest, but mounting /dev/hdc manually will
    
33.                work.
    
34. 
    
35.        block-detach domain-id devid
    
36.            Destroy a domain’s virtual block device. devid must be the device id given to the device by
    
37.            domain 0.  You will need to run xm block-list to determine that number.
    

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