compressing dd backup on the fly

Posted by Phil on Server Fault See other posts from Server Fault or by Phil
Published on 2009-08-10T13:50:35Z Indexed on 2013/10/17 16:04 UTC
Read the original article Hit count: 224

Filed under:

linux

|

backup

|

unix-shell

Maybe this will sound like dumb question but the way i'm trying to do it doesn't work.

I'm on livecd, drive is unmounted, etc.

When i do backup this way

sudo dd if=/dev/sda2 of=/media/disk/sda2-backup-10august09.ext3 bs=64k

...normally it would work but i don't have enough space on external hd i'm copying to (it ALMOST fits into it). So I wanted to compress this way

 sudo dd if=/dev/sda2 | gzip > /media/disk/sda2-backup-10august09.gz

...but i got permissions denied. I don't understand.

© Server Fault or respective owner

Related posts about linux

apt-get install and update fail

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I've got a problem with apt-get update and apt-get install ... commands . every time update or installing fails and errors are : Get:1 http://dl.google.com stable Release.gpg [198B] Ign http://dl.google.com/linux/chrome/deb/ stable/main Translation-en_US Get:2 http://dl… >>> More
kernel module compiling error

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
sh@ubuntu:/home/ccpp/helloworld$ make gcc-4.6 -O2 -DMODULE -D_KERNEL_ -W -Wall -Wstrict-prototypes -Wmissing-prototypes -isystem /lib/modules/`uname -r`/build/include -c -o hello-1.o hello-1.c hello-1.c:4:0: warning: "MODULE" redefined [enabled by default] <command-line>:0:0: note: this is… >>> More
Build-Essentials installation failing

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I am having trouble accessing the several critical header files that show to be a part of the build process. The "Ubuntu Software Center" shows "Build Essentials" as installed: Next I did the following two commands, which did not improve the problem: ~$ sudo apt-get install build-essential [sudo]… >>> More
Updating Debian kernel

as seen on Super User - Search for 'Super User'
I'm trying to update my Debian machine to 2.6.32-46 (which is the new stable). However, after doing apt-get update my apt-cache search linux-image shows me: linux-headers-2.6.32-5-486 - Header files for Linux 2.6.32-5-486 linux-headers-2.6.32-5-686-bigmem - Header files for Linux 2.6.32-5-686-bigmem linux-headers-2… >>> More
Serial connection over a single USB cable (Windows to linux, or linux to linux)

as seen on Server Fault - Search for 'Server Fault'
I'm helping out with a project for an embedded device that only has USB and no serial. This device is running Linux. These days, when we need to connect to a serial port on a device we typically use a USB to serial adapter (on something like a phone system or a load balancing device, etc). I would… >>> More

Related posts about backup

backup exec - backup to disk offline

as seen on Server Fault - Search for 'Server Fault'
Hi We are running backup exec 9.1 doing a backup to disk to portable hard disk drives. When we run the backup manually it works fine. But when the backup is setup to run in the evening on a schedule it does not run as the backup to disk folders goes offline and therefore has to be switched back… >>> More
Ideal backup appliance for backup software like Bacula?

as seen on Server Fault - Search for 'Server Fault'
I'm at a small company and we (the IT department of two) manage <100 client computers and a handful of servers. Currently we're using a company's appliance to handle backup; it does a small backup every night and a full backup every weekend, and a guy comes on Wednesday to take an offsite backup… >>> More
Symantec Backup Exec Error on backup

as seen on Server Fault - Search for 'Server Fault'
Recently we have moved some of servers from real servers- into virtual servers. Since then, we are getting errors like the following: Error category : Resource ErrorsError : e000fed1 - A failure occurred querying the Writer status. For additional information regarding this error refer… >>> More
Windows Server Backup - Recover only shows the latest backup

as seen on Server Fault - Search for 'Server Fault'
We're having quite some trouble at work using Windows Server Backup. We have a HyperV server (Win 2008) running 8 virtual web servers, these are running a variety of OS'es: Win 2003, Win 2008 and a lone Debian. Each virtual server has a separate partition on the physical HyperV server, so e.g. E:… >>> More
Failed Backup Job With Backup Exec 12 and AOFO

as seen on Server Fault - Search for 'Server Fault'
I am backing up a Windows 2003 Small Business Server with SP2. We are running Backup Exec 12 with SP4. Recently the backup job started failing on backing up the system state with the following error: V-79-57344-34110 - AOFO: Initialization failure on: "System?State". Advanced Open File Option… >>> More