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shrinking root partition and using free space to create a block device

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Operating Systems Linux shrinking root partition and using free space to create a block device
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Old 02-03-2009
shrinking root partition and using free space to create a block device
We are intending to protect a set of user specified files using LVM mirroring where the protected space on which the user files are stored is mirrored on an LV on a different disk. Our problem is that for a user with a custom layout has installed linux with 2 partitons for swap and / and there is no other space available on the primary disk where we can store the files to be protected tht is mirrored across other disk, so we intend to allocate some space on the primary disk that can be used as a LV that is mirrored across an LV on different disk.
What can be done in this situation?
For now we thought of the following:
1> Shrinking the root partition to get some unallocated space that can be used to create a PV.
problems :
a. How do u do it? Can gparted be used online without the live CD?
b. How much can the root be compressed without the OS failure?
2> Can the root partition be converted into a LV?
3> There is free space on the root partition. Now can we use this free space to create a block device that can be converted into PV that would contain my protected files mirrored across other LV on a different disk. If so how can we do it?
Can anyone help me with this?
Thanks a lot.
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LEARN ABOUT OSF1

ldd

ldd(1)							      General Commands Manual							    ldd(1)

NAME

       ldd - List dynamic dependencies of executable files or shared objects

SYNOPSIS

       ldd [-rdV] filename

OPTIONS

       Prints  warnings  for  any unresolved data symbol references that would occur as a result of filename being executed. (Checks references to
       only data objects, not functions.)  Prints warnings for any unresolved symbol references that would occur as a  result  of  filename  being
       executed. (Checks references to both data objects and functions.)  Displays the version of the ldd command.

DESCRIPTION

       The  ldd  command  lists  the dynamic dependencies of an executable file or shared object: If filename is an executable file, ldd lists the
       pathnames of all shared objects that would be loaded as a result of executing filename.	If filename is a  shared  object,  ldd	lists  the
       pathnames  of  all shared objects that would be loaded as a result of loading filename. The ldd command expects shared objects to have exe-
       cute permission, and if this is not the case, it will issue a warning before attempting to process the file.

NOTES

       The ldd command does not list shared objects explicitly attached by using dlopen().

       The ldd command prints the record of shared object pathnames to stdout. The optional list of symbol  resolution	problems  are  printed	to
       stderr.

EXIT STATUS

       If filename is not an executable file or a shared object, a non-zero exit status is returned.

EXAMPLES

       The  following  command lists the static dependencies of libXm.so: ldd /usr/shlib/libXm.so The following command lists the static dependen-
       cies of libXm.so as well as any unresolved symbol in libXm.so or any of its dependents: ldd -r /usr/shlib/libXm.so

SEE ALSO

       loader(5)

																	    ldd(1)