William, Thanks for you informative reply. I'll take that into account.
Robin On Dec 13, 2007 12:20 AM, William Astle <[EMAIL PROTECTED]> wrote: > Richard Carter wrote: > > Hi Folks, > > > > My Debian box has a 160GB HD configured as one volume group containing > > six logical volumes one of which is home of size 138GB. I want to use > > lvreduce to shrink home so that I have space to increase the size of my > > other logical volumes: eg. usr and root. The manual page for lvreduce > > says, in part, "You should therefore ensure that any filesystem > > on the volume is resized before running lvreduce so that the extents > > that are to be removed are not in use." However, only 8GB, out of > > 138GB in home are in use so this seems to me to be unecessary. Is this > > correct? > > Not correct actually. The file system itself uses the entire size of the > partition/volume even if it is essentially empty. You have to resize the > file system so that it knows that it doesn't have that space any more > and to make sure it doesn't have any data stored in the area that is > being removed. Remember, you don't know where the data is stored in the > partition, either. > > Put another way, the file system itself is laid out based on the size of > the volume and it knows how big the volume is. If you don't resize it > before shrinking the volume, you will damage the file system and there > is an extremely high chance of data loss. > > -- > William Astle > finger [EMAIL PROTECTED] for further information > > Geek Code V3.12: GCS/M/S d- s+:+ !a C++ UL++++$ P++ L+++ !E W++ !N w--- > !D !M PS PE V-- Y+ PGP t+@ 5++ X !R tv+@ b+++@ !DI D? G e++ h+ y? > > _______________________________________________ > clug-talk mailing list > [email protected] > http://clug.ca/mailman/listinfo/clug-talk_clug.ca > Mailing List Guidelines (http://clug.ca/ml_guidelines.php) > **Please remove these lines when replying >
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