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I recently noticed when I use dd for writing zero's (if=/dev/zero of=/dev/sda) to a SATA drive or restoring an image (to a SATA drive), all the RAM gets eaten up on my system (all 12 gigs- 64 bit architecture obviously). With both of these programs performance slightly decreases over time and then stays consistent once the RAM is all used up. Is this normal? I can't seem to find anything with top that shows the RAM going to either dd or partimage so it seems like a hardware or kernel issue.
Another thing which leads me to think it is a hardware issue, running dd if=/dev/zero of=/dev/null and the RAM allocation stays low.
Anyone have any thoughts on this?
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JSkier
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