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тАО09-22-2007 04:26 AM
тАО09-22-2007 04:26 AM
vg00 has 7 lvols on disk A. The mirroring disk B only has lvol1, 2, and 3 for /stand, swap, and / . Rest lvols have not mirrored yet to disk B. Will the system boot from disk B at this point?
Any idea?
Solved! Go to Solution.
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тАО09-22-2007 05:23 AM
тАО09-22-2007 05:23 AM
Re: Boot disk
Yes, assuming that the second disk was correctly 'pvcreate'd; and s 'mkboot' done for it; and assuming that the first three logical volumes were mirrored in their ordinal sequence.
Of course, you need to mirror your remaining logical volumes too. After all, a mirror of vg00 without anything more than '/stand' and the root filesystem doesn't gain you much more than single user mode. It could be likened to having a head without a body.
Regards!
...JRF...
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тАО09-22-2007 05:53 AM
тАО09-22-2007 05:53 AM
Re: Boot disk
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тАО09-22-2007 06:03 AM
тАО09-22-2007 06:03 AM
Re: Boot disk
> Will this booting bring system up to init 3, instead of single user mode?
The run level is set in '/etc/inittab'. Since '/etc' and '/sbin' are only directories beneath '/' the system will attempt to run all of the startup scripts in '/sbin/init.d' through run-level 3 if you don't specifically boot into single-user mode. Failures in some of the scripts are certain, since the mounting (at run-level 1) of the missing filesystems for the missing logical volumes will fail.
Regards!
...JRF...
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тАО09-22-2007 06:48 AM
тАО09-22-2007 06:48 AM
Re: Boot disk
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тАО09-22-2007 07:49 AM
тАО09-22-2007 07:49 AM
Solution> lvmrc activates vg00 during booting process. as long as vg00 is activated, all lvols are avaliable for mounting regardingless if the lvol is mirrored or not. In this case the system should be brought up to default run level 3 with all file systems defined in /etc/fstab mounted. I don't see why it would fail due to lvols not on booting disk.
Yes, all of the above are true. My original answers were predicted on the assumption that you were booting from a disk with *only* lvol1-3 as in after a failure of the primary disk. In that case, why mirror? In fact, what are you trying to accomplish, or is this solely an academic question? I presume that you want a useful server, not just one that boots.
Regards!
...JRF...
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тАО09-22-2007 08:00 AM
тАО09-22-2007 08:00 AM
Re: Boot disk
Thank you for your inputs.
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тАО09-22-2007 08:00 AM
тАО09-22-2007 08:00 AM