From: Paul. Vanchope (cuihh6@HOTMAIL.COM)
Date: Mon Jan 05 2004 - 02:56:50 EST
i know that the a mksysb tape was devided into 4 parts :
1.BOS boot image (included Kernel Device Drivers)
2.mkinsttape image (included /tapeblksz ,./image.data, ./bosinst.data,
commands)
3.dummy .toc ( some characters added in order to be compatible to a product
tape)
4.rootvg data (your real data in rootvg, such as filesystem and so on)
When i vi /usr/bin/mksysb (mksysb is a script file)
i find the mksysb was executed according to the following sequences before
backup the real data in rootvg :
a) # put the bosboot image on the tape
b) # put a "dummy" bosboot image on the tape
c) # put the bosinst image on the tape
d) # place a dummy toc on the tape
in the above 4 steps, i can understand step a, c , d , But doesn't know why
to execute step b ? Why a dummy bosboot image must be put on the tape ?
Please give some suggestions. Thanks in advance.
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