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Caveat Fair Reader. Now, then. The -T means to test the cache system i. The -t means to report stats on the disk in question, reading data not in the cache. But even with varying numbers, 3. I thought the ad for the HD said something about 66MB per second!!?!? What gives? Nice, safe, but not necessarily optimal.

What's all this about bit mode? I thought that went out with the ! And why are most of the other options turned off? Well, it's generally considered a good idea for any self-respecting distribution to install itself in the kewlest, slickest, but SAFEST way it possibly can. The above settings are virtually guaranteed to work on any hardware you might throw at it.

But since we know we're throwing something more than a dusty, 8-year-old, bit multi-IO card at it, let's talk about the interesting options: multcount: Short for multiple sector count. Almost all modern IDE drives support this. This flag controls how data is passed from the PCI bus to the controller. Some even support bit async. Turning this on will almost certainly double your throughput see below. What does that mean? It lets Linux attend to other interrupt-related tasks i. It should improve overall system response time, but be warned: Not all hardware configurations will be able to handle it.

See the manpage. If you can get your controller and drive using a DMA mode, do it. But I have seen more than one machine hang while playing with this option. Again, see the manpage and the example on the next page! And some multi-reads might work. Almost double the disk throughput without really trying! Of course, enabling these gets riskier. Why is it always a trade-off between freedom and security? Unfortunately this seems to be unsupported on this particular box it hung like an NT box running a Java app.

A far cry from the miniscule 3. By the way, notice how we specified the -m16 and -c3 switch again? That's because it doesn't remember your hdparm settings between reboots. At least not with a straight face Now, after running the benchmark a few more times, reboot in multi-user mode and fire up X. Load Netscape. And try not to fall out of your chair. In conclusion This is one of those interesting little tidbits that escapes many "seasoned" Linux veterans, especially since one never sees any indication that the system isn't using the most optimal settings.

Gee, all my kernel messages have looked fine And using hdparm isn't completely without risk, but is well worth investigating. And it doesn't stop at performance: hdparm lets you adjust various power saving modes as well. Many thanks to Mark Lord for putting together this nifty utility. Command m for help : p. You are running BETA version of reiserfs shrinker.

Backup of you data is recommended. Do you want to continue? ReiserFS report: blocksize block count free blocks bitmap block count The number of cylinders for this disk is set to There is nothing wrong with that, but this is larger than , and could in certain setups cause problems with: 1 software that runs at boot time e.

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