Messages in this thread | | | From | "Emmanuel Hislen" <> | Subject | RE: SiI2112 + Seagate + nFroce2: no DMA! | Date | Sat, 24 Jan 2004 01:27:24 -0800 |
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Hi Hugo,
I have re-installed my machine with Fedora Core 1 (thinking a newer version than RH9 would make the jump to 2.4.24 or 2.6 easier), and this fixed the DMA issue :-)
Now my SATA drive is running stable in UDMA6.
However, performance is still way below expectations.
I got a huge improvement: my disc read speed (hdparm -t) went from 1.3 to 25 MB/sec. This is still slower than my PATA drive on my 3 years old AMD 900 PC running Redhat 9.0 (around 35 MB/sec).
Could you please let me know what you are getting so I know what to expect?
My next step is to try 2.4.24 or 2.6.1 as you suggested, but googling around a little bit before I do so I found out a few worrying things:
- people have reported a drop in performance on SATA in some 2.6 based kernel (2.6.0-test9), with reported speeds around 20MB/sec. Apparently there is no more way to tune max_kb_per_req in 2.6?? - I have found reports that both ide and libdata libraries are limiting max_kb_per_req to 15 Kb specifically for Seagate drives. So It looks like I can't even set it to 128 (I did not even try as I saw reports of memory corruption).
So basically since you've got it to work I'd like to know:
* what speed you get, and what is the RPM of your Seagate * what is your max_kb_per_req setting (I have 15K) * what is your accoustic management setting (I have 0)
I could not fix the time on linux so I am sending this mail from WinXP (just kidding I lost my mails on the linux machine after re-installing :-).
Thanks,
Emmanuel.
-----Message d'origine----- De : Hugo Ranger Mills [mailto:hrm@carfax.org.uk]De la part de Hugo Mills Envoye : Tuesday, January 20, 2004 12:58 AM A : manu Cc : linux-kernel@vger.kernel.org Objet : Re: SiI2112 + Seagate + nFroce2: no DMA!
On Tue, Dec 31, 2002 at 09:55:59PM -0800, manu wrote:
Incidentally, did you know that the date on your computer is very, very wrong?
> I'm about to give up on my SATA drive as I can't get it to work properly. > So I thought I may try asking the experts before falling back to PATA. > > I have seen many mails reporting the same issue, some of them 6-month old: > > - SATA drive comes up in pio mode, not in dma > - trying to turn on dma with hdparm is a nightmare: I/O errors, crash > with data corruption... I tried both: > > hddarm -d1 /dev/hde > > and: > > hdparm -u1 -c3 -d1 -X66 /dev/hde > > crash in both cases :-(( > > > Here's my equipment: > > > ABIT AN7 motherboard (nForce2 chipset, SiI3112 SATA controller) > AMD Athlon XP 2600+ (+ 512 DDR / 400 MHz) > SATA HD Seagate Barracuda 160 Gb > > The SATA HD is my only drive. The only thing connected to my IDE > controllers is a DVD/CD combo. > > Running Linux Redhat 9.0 > kernel 2.4.20-28.9 ^^^^^^^^^^^^^^^^^^ This is your problem. There have been a number of bug-fixes to the SiI drivers since 2.4.20. Try it again with a newer kernel -- such as 2.4.24.
> I've been googling for days now and could not come accross a solution, > on the contrary I came under the impression that the combination of > SiI3112 +and Seagate was doomed.
Not so. I have a SiI3112 controller and a 120GiB Seagate drive, and they work very well together. I'm using 2.6.1, although 2.4.23 also worked well for me.
[snip] > Isn't there a solution?? > > I am willing to try patches of experimental code. At this point I am > looking at reinstalling everything on a PATA drive anyway, so I have > nothing to loose.
Try using 2.4.24 or 2.6.1.
Hugo.
-- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 1C335860 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- All hope abandon, Ye who press Enter here. ---
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