Re: Fujitsu can't work properly in UDMA2 mode
Vinche (vinche@windoms.sitek.net)
Wed, 16 Dec 1998 11:07:59 +0300
Vladimir Volovich wrote:
>
> "V" == Vinche writes:
>
> V> Symthoms: 1. When I'm trying to repartition disk(Fujitsu 4.3G
> V> UDMA2) and making 3 partitions(2G,128M Swap,2G - hda1,hda2,hda3
> V> respectively) on reread partition table I'm getting hda1,hda2,hda4
> V> partitions with sizes 128M,2G,1.3T(1000G) respectively.
> []
> V> I resolved that disabling UDMA2 in bios makes almost all ok but
> V> after booting in a few minutes kernel resets /dev/hda and disables
> V> DMA which slows down system perfomance. After this I can fdisk
> V> normally and install Linux. Rebooting many times shows no errors.
>
> V> Is this a known bug of Fujitsu drives or maybe it is problem other
> V> than UDMA2.
>
> i had similar problems with Fujitsu drives; they appeared to be
> because of overclocking: when base freq. is set to 83 MHz, (some)
> Fujitsu HDDs do not work in UDMA mode. They work if either
>
> * the computer is not overclocked (66 MHz; i did not try 75 MHz after
> a crash ;); in this case UDMA works fine
>
> or
>
> * the computer is overclocked (75 MHz or 83 MHz), but you are not
> using UDMA.
>
> Please, let me know if your problems were due to overclocking, too. :)
>
> Best regards, -- Vladimir.
Yes you are right, my computer overclocked to 83MHz. I'll try 66MHz.
Thanks.
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