安装debian testing失败
我尝试用cd和dvd的镜像安装，均告失败，这是部分日志：
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May 26 14:17:28 in-target: The following NEW packages will be installed:
May 26 14:17:28 in-target: busybox
May 26 14:17:28 in-target: 0 upgraded, 1 newly installed, 0 to remove
and 0 not upgraded.
May 26 14:17:28 in-target: Need to get 0 B/397 kB of archives.
May 26 14:17:28 in-target: After this operation, 688 kB of additional
disk space will be used.
May 26 14:17:28 in-target: Err cdrom://[Debian GNU/Linux testing
_Wheezy_ - Official Snapshot amd64 DVD Binary-1 20120521-04:47]/
wheezy/main busybox amd64 1:1.19.3-7
May 26 14:17:28 in-target: Please use apt-cdrom to make this CD-ROM
recognized by APT. apt-get update cannot be used to add new CD-ROMs
May 26 14:17:28 in-target: Failed to fetch cdrom:[Debian GNU/Linux
testing _Wheezy_ - Official Snapshot amd64 DVD Binary-1
20120521-04:47]/pool/main/b/busybox/busybox_1.19.3-7_amd64.deb Please
use apt-cdrom to make this CD-ROM recognized by APT. apt-
May 26 14:17:28 in-target: E: Unable to fetch some archives, maybe run
apt-get update or try with --fix-missing?
May 26 14:17:28 base-installer: error: exiting on error
base-installer/kernel/failed-package-install
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我尝试chroot以后执行 apt-cdrom 和使用--fix-missing选项都没有用
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