Hello, I really need help... I'm crazy...
I put a new Hard Drive on my computer and it just use UDMA33... but it have UDMA133 support... my motherboard have UDMA100 or ATA100 support and my old HD work with UDMA100!! I'm crazy... I will tell you everthing that I do...and anybody try help me..

Motherboard: SY-K7VTA-PRO
Processor: Athlon XP 2000
Memory:256
Video:Gforce4 MX 128 MB

2 HDs :

SAMSUNG SP8004H 80GB Primary MASTER
SAMSUNG SV3063H 30GB Secondary SLAVE

Master: Redhat 9 kernel 2.4.20-8

Partitions:
Filesystem Size Used Avail Use% Mounted on
/dev/hda3 9.7G 4.6G 4.6G 51% /
/dev/hda1 99M 25M 70M 26% /boot
/dev/hda2 58G 42M 55G 1% /home
/dev/hda7 4.6G 33M 4.3G 1% /netbsd
/dev/hda5 981M 271M 661M 30% /var
and...
/dev/hda6 swap 256mb

SLAVE: windows2000

hdb1 10 GB NTFS --->System
hdb5 20 GB VFat --->Home

Some information with hdparm:

# /sbin/hdparm -i /dev/hda --->80GB

/dev/hda:

Model=SAMSUNG SP8004H, FwRev=QW100-60, SerialNo=0415J1FTB31973
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=156368016
IORDY=yes, 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
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-6 T13 1410D revision 1: 1 2 3 4 5 6


# /sbin/hdparm -i /dev/hdb ---->30GB

/dev/hdb:

Model=SAMSUNG SV3063H, FwRev=PL100-11, SerialNo=0271J1FNA36956
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
BuffType=DualPortCache, BuffSize=426kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=59797584
IORDY=yes, 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
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-4 T13 1153D revision 17: 1 2 3 4 5 6


Boot message:

more /var/log/dmesg |grep DMA
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hdaMA, hdbMA
ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdcio, hddMA
hda: 156368016 sectors (80060 MB) w/2048KiB Cache, CHS=9733/255/63, UDMA(33)
hdb: 59797584 sectors (30616 MB) w/426KiB Cache, CHS=3722/255/63, UDMA(100)

My linux and windows boot normaly...

I already switch hd from flat cable and change pin set for SLAVE one of other... everthing fine but always my old HD with UDMA100 and the other UDMA33...
I Download a program from Samsung that make a boot disk, but don't help much...

it's my HD not work property???
or my BIOS setting have a trick??? I have the last version of Soyo BIOS installed!!
or I buied a HD with 80 GB and 7200 RPM only with UDMA33?? (I don't think so... :-( )
My HD work normaly!!

Anybody please help!
sory for my BAD ENGLISH (I'm Work on it! :-D)

OK! after days and days, looking on the samsung site I found a program called HUTIL! and this program have an option called set_max_dma... and now it work at full speed :-(
Sory for this post guys....

Who have a samsung hd can see if are use the maximun speed with this program and if not set the maximum speed... :-\