Hi To create the snapshot you need to have enough unpartitioned space in LVM value group. Alternatively, you can take this space from exists LVM-logical volume to valume group umount /dev/VolGroup00/LogVol00 resize_reiserfs -s-1G /dev/VolGroup00/LogVol00 (for riserfs) or resize2fs /dev/VolGroup00/LogVol00 18G (for ext3) lvreduce -L-1G /dev/VolGroup00/LogVol00 mount /dev/VolGroup00/LogVol00 Can you show?: vgdisplay ?? -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux Sent: Friday, July 24, 2009 10:40 AM To: General Red Hat Linux discussion list Subject: Re: backup system for RHEL Hi, this sounds interesting, I didn´t know the -s option of lvcreate. I have a problem with this. In my VG I haven´t free space. When I run the command: lvcreate -s -L 1G -n MySnap1 /dev/VolGroup00/LogVol00 Insufficient free extents (0) in volume group VolGroup00: 32 required I have this: /dev/mapper/VolGroup00-LogVol00 19360436 13805512 4555620 76% /home and lvdisplay: lvdisplay --- Logical volume --- LV Name /dev/VolGroup00/LogVol00 VG Name VolGroup00 LV UUID 8BRqMo-K9g5-2Pym-SZfS-Wte3-ZMvM-cqYMCv LV Write Access read/write LV Status available # open 1 LV Size 19,06 GB Current LE 610 Segments 2 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 what can I do in this situation? I´m not an expert with LVM Thanks ESG 2009/7/23 Geofrey Rainey <Geofrey.Rainey@xxxxxxxxxx> > Oh and by the way, after the dd is finished you can lvremove the > snapshot file. > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto: > redhat-list-bounces@xxxxxxxxxx] On Behalf Of Geofrey Rainey > Sent: Friday, 24 July 2009 9:16 a.m. > To: General Red Hat Linux discussion list > Subject: RE: backup system for RHEL > > I use Xen snapshot like so: > > 1. create a snapshot file - this can probably be quite small > (depending on usage but 1G is probably enough) > > lvcreate -s -L 1G -n <name of snapshot> > /dev/<volume_group>/<logical_volume_name> > > 2. then backup your partition with something like this: > > dd if=/dev/<volume_group>/<name of snapshot> of=<path/lvm_backup.img> > bs=1M > > 3. if you need to restore, do the following: > > dd if=< path/lvm_backup.img > of=/dev/<volume_group>/<logical_volume_name> > > Of course you'll need as much space as the original partition for this > but that's the only solution I think. > > > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto: > redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux > Sent: Friday, 24 July 2009 12:46 a.m. > To: General Red Hat Linux discussion list > Subject: Re: backup system for RHEL > > Thanks for your answer, > I´ll take a look at openfiler, it looks great. > > One question, how do I make a Xen snapshot? With vmware I see the > option, but with Xen not. > > any help? > > thanks, > > ESG > > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe > https://www.redhat.com/mailman/listinfo/redhat-list > ========================================================== > For more information on the Television New Zealand Group, visit us > online at tvnz.co.nz > ========================================================== > CAUTION: This e-mail and any attachment(s) contain information that > is intended to be read only by the named recipient(s). 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