For the Xen images made of partitions, you'd do: # dd if=/dev/sda? of=/backup/xen-backup-image.img bs=1M (where /dev/sda? is the partition which your /etc/xen/<xen-config>:disk='phy:.....' refers to. Make sense? -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux Sent: Friday, 24 July 2009 10:18 p.m. To: General Red Hat Linux discussion list Subject: Re: backup system for RHEL 2009/7/24 Geofrey Rainey <Geofrey.Rainey@xxxxxxxxxx> > You could extend the volume group by creating another physical volume > (using fdisk if you've got spare disk), then extending your volume group > using the > New physical volume. > > Are your Xen images LVs or partitions? > > If they're LVs, then you have to do as I suggested (with a snapshot). If > they're partitions, just use dd. I have some with LVs and some in partitions. I have systems with a directory /home/images an there several images, how I do a backup of one image in particular? dd if=/home/images/? of=? bs=1M thanks, ESG > > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto: > redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux > Sent: Friday, 24 July 2009 10:11 p.m. > To: General Red Hat Linux discussion list > Subject: Re: backup system for RHEL > > 2009/7/24 TYURIN Aleksey <Aleksey.TYURIN@xxxxxxxxxxxxx> > > > 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 > > > > yes of course: > > vgdisplay > --- Volume group --- > VG Name VolGroup00 > System ID > Format lvm2 > Metadata Areas 2 > Metadata Sequence No 6 > VG Access read/write > VG Status resizable > MAX LV 0 > Cur LV 1 > Open LV 1 > Max PV 0 > Cur PV 2 > Act PV 2 > VG Size 19,06 GB > PE Size 32,00 MB > Total PE 610 > Alloc PE / Size 610 / 19,06 GB > Free PE / Size 0 / 0 > VG UUID nlbCIt-jUrq-d0qk-pnN8-tM90-B3w1-0vVVEL > > > The fs is ext3. > > I´m going to try to reduce the filesystem as you suggested. > > One thing, what happens If I dont use LVM at all, (I have a lot of system > with out it). How can I make a snapshot of a Xen Image? > > Greetings, > > ESG > > > > > > > > > ?? > > > > -----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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