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Old 08-18-2003, 10:19 PM   #1
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Registered: Mar 2003
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dd command for backups

I'm using dd to make backup images using PCMCIA based firewire or USB 2.0 cards and an external hard drive. I was wondering if there is a way to optimize my process to increase speed. Right now the command that I'm using is dd if=/dev/hda of=/mnt/sda1/name bs=2M to backup an entire hard drive. Can I make it faster? Maybe enabling dma? Any idea is helpful.
Old 08-19-2003, 04:43 AM   #2
Registered: Jul 2003
Location: Stockholm, Sweden
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dd if=/dev/hda of=/mnt/sda1/name bs=2M
Have you tried with a smaller blocksize? 2MB seems a bit large to me...

(Don't know if it works...)

Otherwise I wouldn't use DD for normal backups since it is a block-level backup and it takes all the blocks on your device even if they are "filled" with data or not...

Maybe you should try something else? (like tar...)




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