请教一道191的题，关于mksysb的

soul

3. Before upgrading a system to the latest maintenance release, a system
administrator attempts to create a mksysb backup of the current system.
During the backup process, the following error message is received:
0512-016: Attempt to create a bootable tape failed
bosboot -d /dev/device -a failed with return code 52
Which of the following commands should be run to diagnose this problem?
A. errpt -a | grep TAPE_ERR6
B. ls -la /usr/lib/boot/
C. fsck -n filesystems 2>;&1 /tmp/mksysb.log
D. mkboot -d /dev/hdisk0 -c

答案是B，哪位请解释一下，谢谢了

ydar

这道题有点太偏了吧！是正式考试用题吗？

0512-016: Attempt to create a bootable tape failed
This message is displayed with one of the following:

bosboot -d /dev/device -a failed with return code Number
mkinsttape /dev/device failed with return code Number
Possible Causes
The media is write-protected (return code 2).
There is not enough space in the file systems (return code 5 or 1).
The tape is defective (return code 11).
The /usr/lib/boot/unix directory is damaged (0 length), or the link to /unix is missing (return code 52 or 45). The tape drive cannot be written to or /dev/blv/ cannot be read.
This may be caused by an incorrect density setting for the tape-drive/tape-type/device-name combination, dirty tape drive heads, or a tape drive hardware problem.

fzm

赞同楼上。

xshining

这道题一点也不偏呀。
mksysb要根据现有系统，首先创建启动块的。如果现有系统有问题，操作当然进行不下去了。