Hi... Umm:
/dev/hda: Timing buffer-cache reads: 64 MB in 1.61 seconds =39.75 MB/sec Timing buffered disk reads: 32 MB in 6.87 seconds = 4.66 MB/sec Buffer-cache reads? Uh... explain that to me please, this particular UDMA can't go past 33 MB/s. But I do believe I heard of a UDMA/66 or something like that. I'm not using that here, though, so... Alex On 17 Jul 1998, Gary L. Hennigan wrote: > Date: 17 Jul 1998 12:33:09 -0600 > From: "Gary L. Hennigan" <[EMAIL PROTECTED]> > To: debian-user@lists.debian.org > Subject: Re: hdparm > Resent-Date: 17 Jul 1998 18:33:13 -0000 > Resent-From: debian-user@lists.debian.org > Resent-cc: recipient list not shown: ; > > <[EMAIL PROTECTED]> writes: > | Martin Oldfield writes: > | > > | > > | > I'd like to improve the IDE performance of my system. The IDE > | > controllers are on a newish Intel motherboard; /proc/pci says: > | > > | > IDE interface: Intel 82371AB 430TX PIIX4 (rev 1). > | > > | > The drives are older: > | > > | > Model=QUANTUM FIREBALL ST6.4A, FwRev=A0F.0800, SerialNo=15672304 > | > Model=QUANTUM FIREBALL_TM3840A, FwRev=A6B.1T00, SerialNo=39662361 > | > Model=ST32140A, FwRev=08.08.01, SerialNo=JBF24417 > | > Model=ST32140A, FwRev=08.08.01, SerialNo=JB770285 > | > > | > Can anyone suggest more aggressive (yet safe!) options for hdparm to > | > make things run more quickly; alternatively is there a repository of > | > known good settings. > | > | Here's a script I added to /etc/init.d (with link in /etc/rc2.d) for better > | performance. Use the '-i' option alone to find out the number for the '-m' > | option. (man page explains all) This script is the last thing executed > during > | bootup. Enjoy! Oh BTW, my transfers jump from 5 Mb/sec to 35Mb/sec. > > You're saying you get 35 mega Bytes per second? That seems highly > unlikely! > > I'm not disputing the fact that your script might improve performance, > haven't tried it, but there's not a hard drive in existence, excluding > specialty solid state drives and RAIDs, that can sustain 35MB/s (I'm > assuming by Mb you meant Mega Bytes and not Mega bits, which is what > Mb is generally used for?). Shoot, I don't even think the UDMA bus can > acheive that? I believe it's theoretical maximum is 33MB/s. Whatever > you're using to get this performance number isn't measuring your disk > throughput but your cache performance. > > Of course, if you meant what you wrote and get 35 mega bits/sec I > could believe that, although if the drive was getting 5Mb/s to start > with it's time for a new drive! > > Try using > > hdparam -t -T /dev/<whatever> > > for a little better estimate. > > Gary > > > -- > Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null > > -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null
