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n8wood
n00b
Joined: 11 Apr 2002
Posts: 33
Location: providence, ri usa
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 Posted: Thu Nov 28, 2002 3:23 pm Post subject: DMA and Promise controller |
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I am using a Promise 20268 ide controller (ATA100) and cannot get it running with udma5. I had it running at udam5 off the Gentoo boot disc, but for some reason I can't get it working now.
I've tried "hdparm -d1 -X69 /dev/hde" but it remains at udma2.
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*Gentoo kernel 2.4.19-r9
w/ Promise support
NO Special UDMA Feature (shouldn't need it according to help)
NO Special FastTrak Feature (no RAID)
===========================
root@rodimus src # hdparm -i /dev/hde
/dev/hde:
Model=WDC WD800JB-00CRA1, FwRev=17.07W17, SerialNo=WD-WMA8E4217786
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=156301488
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
AdvancedPM=no WriteCache=enabled
Drive conforms to: device does not report version: 1 2 3 4 5
===========================
root@rodimus src # hdparm -Tt /dev/hde
/dev/hde:
Timing buffer-cache reads: 128 MB in 1.31 seconds = 97.71 MB/sec
Timing buffered disk reads: 64 MB in 2.29 seconds = 27.95 MB/sec
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during the Gentoo install, I clocked disk reads at ~40 MB/sec w/ udma5.
Thanks!
n8wood |
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btg308
n00b
Joined: 14 Aug 2002
Posts: 72
Location: Östersund, Sweden
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| Posted: Sat Feb 08, 2003 9:13 am Post subject: |
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It's something in the kernel drivers. Using the 2.4.21-pre4-ac2 kernel solved this problem for me and I am now running two WD 100 and two WD 120 gig drives at ATA100 speeds on a Promise ATA-133 TX2 (PDC20269) controller.
With the Gentoo 2.4.19 kernel, I only got ATA33 (udma2) out of them. No other changes (cables and such). No need to tweak them with hdparm either, they went to udma5 automatically at boot and stayed there. Happy, happy, joy, joy!
_________________
Gentoo Linux - Feel the speed.
Kawasaki GPZ 1100 - The need for speed. |
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rommel
Veteran
Joined: 19 Apr 2002
Posts: 1145
Location: Williamsburg Virginia
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| Posted: Sat Feb 08, 2003 9:30 am Post subject: |
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you should enable those fast trak features in the kernel just not anything with ata raid support...but thats at the end of the section.
enable also generic pci ide chipset support ,bus master dma support and dma by defualt. |
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