LVM Questions

"Nicholas Muguira" <Nicholas.Muguira@iongeo.com> · Thu, 27 Mar 2008 17:27:07 -0500

I am trying to judge the ability of LVM to address a problem
I currently have, and I have few questions:

1)       Is there a
way to configure LVM so that the data on remaining PV’s in a VG are is
accessible after a PV fails?

2)       Is there a
way to configure LVM so that the LV
will still be accesible and readable/writable if a PV fails while in use?

3)       Assuming
groupings of external drives, can a LV
be created and exported on each group of the same name and then imported into
different systems. For example assuming 10 drives, drives a-e are in group 1
and drives f-j are in group 2. Using System A with drives a-e connect to
/dev/sda-e create a parittion that spans the entire drive for each drive.
Create a PV on each partition (/dev/sd[a-e]1). Create a VG named test with all
partitions (/dev/sd[a-e]1). Create a LV
that covers all of the VG test. Mount the LV
and format it (ext3 in this case). Umount and vgexport the vg test. Repeat the
steps with drives f-j with same VG and LV
names. Connect group 1 to System B and vgimport VG test, create LV with it and mount the
filesystem. Umount the filesystem and disconnect group1. Connect group 2 to
System B and vgimport VG test and mount the filesystem (using LV previously created)?

Raid is unavailable due to already deployed hardware, and I
realize that LVM is not Raid and will not give me a means to recover the data
on the failed HDD.

Thanks,

Nick

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