Re: [newbie] hdparm speed test results
Albert wrote: > > Depending on the motherboard / chipset > > hdparm -d1 /dev/hda is the common flag > > Here is a snip from this machine > > /dev/hdb: > Timing buffer-cache reads: 128 MB in 1.68 seconds =76.19 MB/sec > Timing buffered disk reads: 64 MB in 3.29 seconds =19.45 MB/sec > > We have others on the bench with 150 MB/sec buffer-cache and disk reads of 26 > MB/sec > > HTH > WOW! I just wanted to thank you for posting this, I decided to try this and before DMA flag was set equaled 3.01 MB/sec, and after the DMA flag was set it was 17.93 MB/sec!!! WOW! Hope the rest of the computer can keep up with this throughput!! This should be on a page of Linux tweaks! Vern > On Mon, 24 Apr 2000, you wrote: > > I am running Mdk 7-2 with 13 GB HD and DMA33. When I ran my first > > hdparm -t to test the drive read speed the results were only 3 MB/sec and the > > RealPlayer radio I had running was shut down. > > After setting the dma and unmask flags to on ,the test speed jumped to > > 14 MB/sec and RealPlayer did not cut out. > > What are the average disk read speeds to be expected with such a hard > > drive and is there anything else to optimize speed ? > >This seems like a worthwhile tweak for those who suspect their hd > > speed is slowing down the system. Just like to pass this along fyi and to see > > what others are getting on this speed test. > -- > Linux Tests > http://www.linuxtests.org
Re: [newbie] hdparm speed test results
The downside involves just how much data you're reading in. Seeing as how the speed is now so much greater - about 5 times greater - you run the risk of having your hard drive coming loose, bouncing around inside the case, and perhaps causing bodily harm if it should escape altogether. My suggestion: line the inside of your computer case with heavy-duty duct tape, the handyman's secret weapon. *** REPLY SEPARATOR *** On 4/25/00 at 2:14 PM vern wrote: >Okay, being an old skeptic and a young Linux mechanic >what's the "downside" of such a tweak?? >Will I have data errors (read/write) corrupted files, >and such?? >Why is the "default" set so low?? >Vern > >Larry Varney wrote: >> >> Mine was similar, until I did the "hdparm -d1 hda", and the result jumped up into >the 13 MB/sec range. Changing the umask didn't seem to make any difference, though.
Re: [newbie] hdparm speed test results
Okay, being an old skeptic and a young Linux mechanic what's the "downside" of such a tweak?? Will I have data errors (read/write) corrupted files, and such?? Why is the "default" set so low?? Vern Larry Varney wrote: > > Mine was similar, until I did the "hdparm -d1 hda", and the result jumped up into >the 13 MB/sec range. Changing the umask didn't seem to make any difference, though. > > Larry Varney > Cold Spring, KY > http://w3.one.net/~lvarney > > *** REPLY SEPARATOR *** > > On 4/24/00 at 11:50 PM vern wrote: > > >Here's what my "hunk O junk" does pretty crummy by your > >standards!! > >Vern > >PS. Looks like I'm due for a tuneup! > > > >/dev/hda: > > Timing buffered disk reads: 64 MB in 21.62 seconds = 2.96 MB/sec > > > > > >Albert wrote: > >> > >> Depending on the motherboard / chipset > >> > >> hdparm -d1 /dev/hda is the common flag > >> > >> Here is a snip from this machine > >> > >> /dev/hdb: > >> Timing buffer-cache reads: 128 MB in 1.68 seconds =76.19 MB/sec > >> Timing buffered disk reads: 64 MB in 3.29 seconds =19.45 MB/sec > >>
Re: [newbie] hdparm speed test results
Here's what my "hunk O junk" does pretty crummy by your standards!! Vern PS. Looks like I'm due for a tuneup! /dev/hda: Timing buffered disk reads: 64 MB in 21.62 seconds = 2.96 MB/sec Albert wrote: > > Depending on the motherboard / chipset > > hdparm -d1 /dev/hda is the common flag > > Here is a snip from this machine > > /dev/hdb: > Timing buffer-cache reads: 128 MB in 1.68 seconds =76.19 MB/sec > Timing buffered disk reads: 64 MB in 3.29 seconds =19.45 MB/sec > > We have others on the bench with 150 MB/sec buffer-cache and disk reads of 26 > MB/sec > > HTH > > On Mon, 24 Apr 2000, you wrote: > > I am running Mdk 7-2 with 13 GB HD and DMA33. When I ran my first > > hdparm -t to test the drive read speed the results were only 3 MB/sec and the > > RealPlayer radio I had running was shut down. > > After setting the dma and unmask flags to on ,the test speed jumped to > > 14 MB/sec and RealPlayer did not cut out. > > What are the average disk read speeds to be expected with such a hard > > drive and is there anything else to optimize speed ? > >This seems like a worthwhile tweak for those who suspect their hd > > speed is slowing down the system. Just like to pass this along fyi and to see > > what others are getting on this speed test. > -- > Linux Tests > http://www.linuxtests.org
Re: [newbie] hdparm speed test results
Depending on the motherboard / chipset hdparm -d1 /dev/hda is the common flag Here is a snip from this machine /dev/hdb: Timing buffer-cache reads: 128 MB in 1.68 seconds =76.19 MB/sec Timing buffered disk reads: 64 MB in 3.29 seconds =19.45 MB/sec We have others on the bench with 150 MB/sec buffer-cache and disk reads of 26 MB/sec HTH On Mon, 24 Apr 2000, you wrote: > I am running Mdk 7-2 with 13 GB HD and DMA33. When I ran my first > hdparm -t to test the drive read speed the results were only 3 MB/sec and the > RealPlayer radio I had running was shut down. > After setting the dma and unmask flags to on ,the test speed jumped to > 14 MB/sec and RealPlayer did not cut out. > What are the average disk read speeds to be expected with such a hard > drive and is there anything else to optimize speed ? >This seems like a worthwhile tweak for those who suspect their hd > speed is slowing down the system. Just like to pass this along fyi and to see > what others are getting on this speed test. -- Linux Tests http://www.linuxtests.org
