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On Tue, Jul 11, 2006 at 11:58:04AM +0100, Gavin Seddon wrote: |
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> Yes, |
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> I tried this and, |
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> ' hdparm -d1 -X /dev/hda |
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> |
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> /dev/hda: |
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> setting using_dma to 1 (on) |
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> HDIO_SET_DMA failed: Operation not permitted |
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> setting xfermode to 0 (default PIO mode) |
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> using_dma = 0 (off) |
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> linuxstation mbpssgms # whoami |
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> root' |
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|
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That most likely means you are missing the proper IDE driver in your |
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kernel and the system has defaulted back to the "generic" IDE driver. |
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What you want to do is use "/usr/sbin/lspic" to determine which IDE |
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chipset you have in the system and make sure that you have the |
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correct driver compilied in the kernel. |
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|
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As an example, I have an older Dell with the following IDE chipset |
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(output from lspci): |
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00:1f.1 IDE interface: Intel Corporation 82801AA IDE (rev 02) |
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|
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So in the kernel config I have the following options: |
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|
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Device Drivers ---> |
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|
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ATA/ATAPI/MFM/RLL support ---> |
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|
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<*> ATA/ATAPI/MFM/RLL support |
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<*> Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support |
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<*> Include IDE/ATA-2 DISK support |
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[*] Use multi-mode by default |
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<M> Include IDE/ATAPI CDROM support |
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[*] PCI IDE chipset support |
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[*] Sharing PCI IDE interrupts support |
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[*] Generic PCI bus-master DMA support |
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[*] Use PCI DMA by default when available |
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<*> Intel PIIXn chipsets support |
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|
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The last three options are the most important for getting DMA to work on |
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the dirve, and the last option will vary based on the chipset in your |
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system. |
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|
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Brett |
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-- |
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