这题为什么选C?

sunnyxia

9.A system administrator must perform disaster recovery on a smaller system. The original rootvg drive was 4.5 GB and is being replaced with a 1.0 GB drive. Which of the following procedures should be performed before the backup to make sure that the mksysb restores on the 1.0 GB disk?
A.Edit the image.data file and set FS_COMPRESS=yes for each filesystem.
B.Edit the image.data file and set UPPER_BOUND=4 for each logical volume.
C.Edit the image.data file and change the PP_SIZE for each logical volume to 4MB.
D.Edit the image.data file and divide the logical partition number for each logical volume by 2.

sunnyxia

各位大虾帮下忙拉

老农

哪里来的题啊？感觉不对

sunnyxia

就是IBM网站上的183练习题啊.我也觉得不太对啊,

smitty

你是不是抄错题了，我印象中似乎有一个是9G的。

johnsons

是不是SHRINK选项也要修改成YES

sunnyxia

这踢是从IBM网站上copy下来的,应该没有错啊.答案就是选C,为什么设成4MB呢?其实1016*4MB还是4G啊,设这个和1G有关系吗?不解...

jackx

The answer should be C.
Please read the comments draft from image.data:
# For the default image.data file, the PPSIZE stanza MUST!!!!!!! be left blank.
# If you are creating a custom one, you may fill it in if you know what size   
# you think you want.  Otherwise, BOS install will pick one.                  

If you leave it blank in this case, you will get PP size=1M when restoring.

老农

你说的对：）
要不改的话，PPsize会是1M，导致创建的各个LV的大小都变小了，空间可能不够。
看来还是得认真看啊。

炸鸡

它原来最小应该是4M，但也有可能是其它大小啊，你改成4M后仍然会空间不够。