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O'Reilly Network: Speeding up Linux [Disks] Using hdparm(8)

Jul 01, 2000, 15:36 (5 Talkback[s])
(Other stories by Rob Flickenger)

"Are you running an Intel Linux system with at least one (E)IDE hard drive? Wouldn't it be neat if there were a magical command to instantly double the I/O performance of your disks? Or, in some cases, show 6 to 10 times your existing throughput? Did you ever just wonder how to tell what kind of performance you're getting on your "tricked-out" Linux box?"

"So, you've got your brand-new UltraATA/66 EIDE drive with a screaming brand-new controller chipset that supports multiple PIO modes and DMA and the leather seat option and extra chrome... But is your system actually taking advantage of these snazzy features? The hdparm(8) command will not only tell you how your drives are performing, but will let you tweak them out to your heart's content."

"Now before you get too excited, it is worth pointing out that under some circumstances, these commands CAN CAUSE UNEXPECTED DATA CORRUPTION! Use them at your own risk! At the very least, back up your box and bring it down to single-user mode before proceeding."

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