Well Finally these are the results of the test: time dd if=/home/images/nodo1.img of=/home/images/backup/nodo1backup.img bs=1M 10240+1 records in 10240+1 records out 10737418242 bytes (11 GB) copied, 255,37 seconds, 42,0 MB/s real 4m20.980s user 0m0.028s sys 0m19.461s # ll nodo1.img -rwxr-xr-x 1 root root 10737418242 jul 24 14:28 nodo1.img # ll backup/nodo1backup.img -rw-r--r-- 1 root root 10737418242 jul 24 14:27 backup/nodo1backup.img In 4 minutes I have made a copy of the image and then I used it and it works fine. The problem I see with this, is the size of the image. When you make a real snapshot the size is very small, but with this method the size is the same as the original image. Backing up this file to an external device will take a long time. For me, it´s valid, because I have a small number of images, but for a big number of images It will be impossible to make this backup. Another aproach to this problem? ESG 2009/7/24 Geofrey Rainey <Geofrey.Rainey@xxxxxxxxxx> > Na you won't break anything apart from maybe increasing the load/ i/o wait > On your server..otherwise you'll get a nice backup :) (make sure you've got > The exact same space as the partition you're backing up too) > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto: > redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux > Sent: Friday, 24 July 2009 10:39 p.m. > To: General Red Hat Linux discussion list > Subject: Re: backup system for RHEL > > Thanks Geogfry, > I´m going to try it to see what happens, > > I expect I´ll dont break nothing ;-) > > Greetings, > > ESG > > > > 2009/7/24 Geofrey Rainey <Geofrey.Rainey@xxxxxxxxxx> > > > Yes exactly, that's the way. > > > > > > -----Original Message----- > > From: redhat-list-bounces@xxxxxxxxxx > > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux > > Sent: Friday, 24 July 2009 10:33 p.m. > > To: General Red Hat Linux discussion list > > Subject: Re: backup system for RHEL > > > > 2009/7/24 Geofrey Rainey <Geofrey.Rainey@xxxxxxxxxx> > > > > > 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? > > > > > > > Not really, > > > > Because the images are not in a partition, They are files. > > For example I have this: > > disk = [ "tap:aio:/home/images/NODE1.img,xvda,w" ] > > > > perhaps doing: > > dd if=/home/images/NODE1.img of=/backup/xen-backup-image.img bs=1M > > > > will work? > > > > ESG > > -- > > redhat-list mailing list > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > 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). This information > > is not to be used or stored by any other person and/or organisation. > > > > > > -- > > redhat-list mailing list > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > https://www.redhat.com/mailman/listinfo/redhat-list > > > -- > 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). This information > is not to be used or stored by any other person and/or organisation. > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list
