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    SubjectRe: LBA48 on PDC20265 (again and again...)


    There was a recent threads on this issue:
    "IDE bug - was: Re: uncorrectable ext2 errors"
    and "Promise IDE patches".

    One of conclusions was that there is no reason not to enable LBA48
    on PDC20265. I will send Jan's patches to Linus. Thanks for verifying this.


    On Wednesday 03 of September 2003 14:46, Petr Vandrovec wrote:
    > Hi,
    > during last year there was couple of complaints that pdc202xx_old
    > driver does not allow LBA48 on first channel, and couple of confirmations
    > that just removing these two lines which do:
    > if (hwif->pci_dev->device == PCI_DEVICE_ID_PROMISE_20265)
    > hwif->no_lba48 = (hwif->channel) ? 0 : 1;
    > fixes problem, and both channels run with lba48 drives just fine...
    > Yesterday I bring home two nice 160GB seagates, hooked them up to
    > the Promise, and booted. And to my surprise we still do not enable
    > lba48 on primary channel...
    > Is there some reason for doing that? I removed this, and I was able
    > to copy contents of my old 120GB disk to the 160GB one, with 40G offset
    > (so lba48 has to work, otherwise first 40GB holding an VFAT partition with
    > some gzipped test files gets corrupted). Currently these two drives
    > are unused (they just hold backup copy of dying 120GB wd), so I can do
    > any experiments you may want to confirm/decline idea that we should
    > remove this no_lba48 hack. Of course unless you have datasheet which says
    > that it cannot work. But as Promise BIOS happily says that two 149GB disks
    > (149 * 2^30 == 160 * 10^9) running UDMA5 are attached, I assume that it
    > is willing to handle LBA48 on both channels.
    > Thanks,
    > Petr Vandrovec

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