This is one of the several cases that point out the code currently fails
to backspeed and maximize throughput. This is a minor issue and would not
stop it from moving to "supported"!
IBM-DJNA-352030, 19470MB w/1966kB Cache, CHS=2482/255/63, (U)DMA
This is an ATA-66 drive that has been cripped to ATA-2 and corrected to
ATA-33. This can be fixed like I fixed the cmd646 code.
This I am willing to move it to supported because it behaves well and only
needs to be taught a few more tricks.
Second explaination about WDC drives defaulting to DMA mode 2 and all UDMA
modes disabled, this is an OEM solution! The folks at ALI had suggested
and made the code default disable WDC devices regardless of UDMA
capablities.
> Andre Hedrick <andre@suse.com> wrote:
>
> >It has that label because the feedback is so light..........
>
> Ok. No problems here for several kernel versions (2.3.2x+)
>
> Uniform Multi-Platform E-IDE driver Revision: 6.21
> ALI15X3: IDE controller on PCI bus 00 dev 78
> ALI15X3: not 100% native mode: will probe irqs later
> ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio
> ALI15X3: simplex device: DMA disabled
> ide1: ALI15X3 Bus-Master DMA disabled (BIOS)
> hda: IBM-DJNA-352030, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ALI15X3: Ultra DMA enabled
> hda: IBM-DJNA-352030, 19470MB w/1966kB Cache, CHS=2482/255/63, (U)DMA
>
> The second IDE-port is disabled in the BIOS.
>
> # hdparm -t -T /dev/hda
> /dev/hda:
> Timing buffer-cache reads: 64 MB in 1.17 seconds =54.70 MB/sec
> Timing buffered disk reads: 32 MB in 2.33 seconds =13.73 MB/sec
Andre Hedrick
The Linux IDE guy
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This archive was generated by hypermail 2b29 : Sat Jan 15 2000 - 21:00:15 EST