[PlanetCCRMA] more disk performance problems

[Fernando Lopez-Lezcano]

On Sat, 2005-10-01 at 22:40 -0400, jfm3 wrote:
> Sorry to take a while to get back on this one.
> 
> I see no different module names under the 2.6.12 FC4 1447 kernel than I
> do under the 2.6.13 ccrma kernel.
> 
> I'm pretty sure this is the releveant lspci entry under 2.6.12.
> 
> 00:1f.2 IDE interface: Intel Corporation 82801FBM (ICH6M) SATA
> Controller (rev 03) (prog-if 80 [Master])
>         Subsystem: Dell: Unknown device 0187
>         Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 7
>         I/O ports at <ignored>
>         I/O ports at <ignored>
>         I/O ports at <ignored>
>         I/O ports at <ignored>
>         I/O ports at bfa0 [size=16]
>         Capabilities: [70] Power Management version 2
> 
> Anyone else using SATA disks under 2.6.13 ccrma?

I am using SATA/FC4/latest edge kernel with no problems. My drive comes
up as sda, not hda. I don't know why it is different in your case. 

This is what seems to be loaded and handling the drive in my machines:
# /sbin/lsmod|grep ata
sata_nv                13444  2
sata_sil               13316  0
libata                 55428  2 sata_nv,sata_sil
scsi_mod              147944  2 libata,sd_mod

What do you get in yours?
I imagine (regretfully) that this is a kernel problem with your
particular chipset. 

-- Fernando

> On Tue, 2005-09-20 at 14:48 -0700, Mark Knecht wrote:
> > Sounds to me like one of the (many) changes between 2.6.12 and 2.6.13
> > possibly got left out of the 2.6.13 FC4 build.
> > 
> > If you go back and run the 2.6.12 FC4 kernel can you see modules
> > loaded that are not loaded under 2.6.13? OR maybe it's just built-0in
> > stuff being different. Who's chipset is in the machine? Post back the
> > results from lspci  if you get a chance.
> > 
> > - Mark
> > 
> > On 9/20/05, jfm3 <jfm3@ouroboros-complex.org> wrote:
> > > This is indeed a SATA drive.
> > > 
> > > What's more frusterating is  that I have decent disk performance with
> > > the stock 2.6.12 FC4 kernel, but not with the Planet 2.6.13 FC4 kernel.
> > > 
> > > I've started analyzing patches, but that will take me a while.
> > > 
> > > The motherboard is whatever is within this Dell Precision M70 laptop.
> > > 
> > > Thanks.
> > > 
> > > On Tue, 2005-09-20 at 09:21 -0700, Mark Knecht wrote:
> > > > On 9/20/05, jfm3 <jfm3@ouroboros-complex.org> wrote:
> > > > > I upgraded to planetedge and the 2.6.13 kernel for FC4.
> > > > >
> > > > > Now, instead of seeing my disk as sda, it comes up as hda. I'm not
> > > > > really sure what this means.
> > > >
> > > > Is this a SATA drive? If so I think that the change from sda to hda is
> > > > part of using libata now in newer kernels instead of more individual
> > > > SATA drivers as before.
> > > >
> > > > DMA is clearly not working for you. What motherboard is this?