Messages in this thread |  | | From | "Guennadi Liakhovetski" <> | Subject | Re[3]: DMA for triton again... | Date | Fri, 01 Dec 2000 14:36:57 +0300 |
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Hi > will try tonight... and will let you know tomorrow... ... Nop, it didn't work. Mike and everybody having experience / knowledge of Western Digital Caviar AC21600H... If you compare WD's documents at: http://www.westerndigital.com/service/FAQ/dtr.html and http://www.westerndigital.com/products/non-current/drives/ac21600.html they, respectively ,say:
UDMA if CCC is A8-AG (AH is not UDMA), D5-D7, Bx, or Cx All others -- PIO Mode 4
and
16.6 MB/s (burst Mode 4 PIO) * 16.6 MB/s (burst Mode 2 DMA) ** 33.3 MB/s (Mode 2 Ultra DMA) ***
*Max PIO burst rate is specified at 16.6 MB/s using the IORDY signal. **Max DMA and multi-word DMA burst rate is specified using the DMARQ and DMACK signals. ***Mode 2 Ultra DMA is supported in the following firmware revisions (CCC Codes: A8, AA, AC, AD, AG, D5, D6, D7, Bx, Cx).
Which one is true? Do non-UDMA AC21600H (I've got CCC F6) support DMA?
Is it possible to find out where hdparm -d1 is stopped? Maybe by compiling it with -g and debugging... As far as I understand, BIOS is not an issue, since ide.txt says, that Linux doesn't use BIOS when working with hard drives...
Thanks Guennadi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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