On Sat, Aug 30, 2008 at 10:48:05PM -0700, Neko wrote: > there is no wonder its an "ensteinium dinosaur" > > piece of hardware travels a lot an sometimes ends up in > 486, p1 or p111, i had to backup this biggy in a fly, > and since the kernel was supporting it, but while the bios was > bewildered i was able to make the copy, > > some suggested the raw device , next time the opportunity occurs > ill try it since i seen improvement on the generic device, > but somehow i think ill have to go back to the 2 1/2 days > scenario, if this hardware restriction occurs again. > > i doupt raw device will go up to the end of the drive as did the > generic one since bios doesnt even.
Bah, you did not listen. Raw vs block device has nothing to do with bios restrictions. -Otto > > > anyways the drives are out, got lot of time to cover the subject during > that time , just a few abstactions that i needed to verify with the bsd team > > > thanks > > neko > > > --- On Thu, 8/28/08, Siegbert Marschall <[EMAIL PROTECTED]> wrote: > > > From: Siegbert Marschall <[EMAIL PROTECTED]> > > Subject: Re: dd performance question > > To: misc@openbsd.org > > Date: Thursday, August 28, 2008, 6:35 AM > > >> On Mon, Aug 25, 2008 at 06:58:30PM -0700, Neko > > wrote: > > >> > Hi all, > > >> > > > >> > having a 250 GB drive on a PATA strip using > > lowest PIO > > >> mode (without dma if possible), drive specs show a > > 8 MB > > >> buffer , > > >> > > > .. > > > > >> > i had ran mine at 4mb block space thinking > > ill use the > > >> 16mb bus transfer > > >> > divided at most in 4, per second, but i > > achieved that > > >> in a minute instead. > > >> > this is really poor performance, 3 days for > > 250gb > > >> transfer at 4mb bs > > >> > > > > > what do you expect ? PIO0 ist max. 3mbyte/sec, in reality > > more like 1-2mbyte/sec. that's 125000sec=34hours if you > > are > > lucky, 3days if you are unlucky. > > > > switch to UDMA4/5/6 and you will get >30mbyte/sec but > > no, > > I wan't no DMA and lowest PIO. > > > > some days one is really wondering... > > > > -sm