From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.12.11.20060308/8.11.6) with ESMTP id k34CGALI025412 for ; Tue, 4 Apr 2006 08:16:10 -0400 Received: from smtp-out1.tiscali.nl (smtp-out1.tiscali.nl [195.241.79.176]) by mx1.redhat.com (8.12.11.20060308/8.12.11) with ESMTP id k34CG9BE020013 for ; Tue, 4 Apr 2006 08:16:09 -0400 Message-ID: <44326388.90001@tiscali.nl> Date: Tue, 04 Apr 2006 14:16:08 +0200 From: Sverre Rabbelier MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [linux-lvm] Shrinking what part of a PV a VG uses, Is it possible? Reply-To: sverre@rabbelier.nl, LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-lvm@redhat.com Heya, I've got two Harddisks, a 250GB (hdb) and a 120GB (hda). HDB is fully in use by only one VG (unknowingly named "lvg"). Which consists of threre LV, being: lvm> lvscan ACTIVE '/dev/lvg/root' [117.19 GB] inherit ACTIVE '/dev/lvg/home' [78.12 GB] inherit ACTIVE '/dev/lvg/swap' [4.06 GB] inherit Also, it's not fully in use (the VG): lvm> vgs VG #PV #LV #SN Attr VSize VFree lvg 1 3 0 wz--n 233.66G 34.28G The trouble is, that on hda I have a Windows XP installation.. (you know what's going to be next right?). Indeed, I want to have the data on hdb (or at least, some 20GB of it) to be readable by Windows. I know of only one way to do that, which would be to format a part of hdb as FAT, which is OK by me. Point being, all of hdb is LVG partitioned, so how am I going to format any of it as FAT? My first choice would be to partition a part of the VG as Windows-readable, but I didn't think that's possible (if it is, please tell me!). My second choice would be to shrink the VG 'lvg', making it not use all of the disk, and partition the remainder (the 34.28G), as FAT. But when reading the help files, I ran into: lvm> help pvresize pvresize: Resize a physical volume in use by a volume group Not implemented. Use pvcreate options. But reading 'info pvcreate' didn't point me in the right direction... at all! My last option would be to remove LVM from hdb, but I have no idea how to do that without losing all my data... So my question is, how do I achieve my goal? How do I get Windows to be able to read some (or all?!) of hdb? Thanks in advance, Sverre Rabbelier.