On Tuesday, May 03, 2005 at 09:58, Drew Winstel wrote:

Hi & Thanks for your quick reply!

Just to verify your setup:

You have a total of four hard drives connected to your PDC20269, hde, hdg, 
hdi, and hdk, correct?

Yes, two drives per physical PDC20269 card. 

Are all four drives running in DMA mode?

Yes, all are running udma6. Here's what hdparm tells me for all drives
(only difference is serial number):

# hdparm /dev/hde

/dev/hde:
 multcount    =  0 (off)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 30515/255/63, sectors = 490234752, start = 0
# hdparm -i /dev/hde

/dev/hde:

 Model=Maxtor 6B250R0, FwRev=BAH41BM0, SerialNo=<...>
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
 BuffType=DualPortCache, BuffSize=16384kB, MaxMultSect=16, MultSect=off
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
 AdvancedPM=yes: disabled (255) WriteCache=enabled
 Drive conforms to: (null): 

 * signifies the current active mode

#

Please post the output of lspci -vv and hdparm run on each of the four hard 
drives.

See attached file for lspci output.

Also, you may want to try downloading and using Albert Lee's pata_pdc2027x 
driver (part of libata-dev-2.6 tree).  See info at my thread from earlier:
http://marc.theaimsgroup.com/?l=linux-ide&m=110902518625384&w=2

Interesting, I will try them out ASAP and return to you!
 

Download the latest libata-dev patch set at 
http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/

Hope this gets you started.

Thanks again!

Regards,

Oskar Liljeblad (oskar@osk.mine.nu)