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Old 03-06-2007, 02:49 PM   #1
srfeo
LQ Newbie
 
Registered: Jul 2006
Posts: 5

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grub ide=nodma not working with CF card - boot delay


Hi there. I have been trying to figure out how to get rid of the dma timer errors that I am getting when booting my debian testing (etch) from compact flash (Kingston) using a CF-to-IDE interface.

I have placed the following in my /boot/grub/menu.lst:

Code:
kernel /boot/vmlinuz-2.6.18-4-686 ide=nodma root=/dev/hda1 ro
but I still get the following DMA errors on bootup:

Code:
Probing IDE interface ide0...
hda: KINGSTON, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: max request size: 128KiB
hda: 4061232 sectors (2079 MB) w/1KiB Cache, CHS=4029/16/63, DMA
 hda:<4>hda: dma_timer_expiry: dma status == 0x21
hda: DMA timeout error
hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
 hda1 hda2 <<4>hda: dma_timer_expiry: dma status == 0x21
hda: DMA timeout error
hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
 hda5 >
hda: dma_timer_expiry: dma status == 0x21
hda: DMA timeout error
hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: dma_timer_expiry: dma status == 0x21
hda: DMA timeout error
hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
Attempting manual resume
And then the bootup continues OK. Is there anyway to avoid this at bootup? Will this cause any problems?

Thanks!
 
Old 03-28-2007, 09:42 AM   #2
amosmagdane
LQ Newbie
 
Registered: Mar 2007
Posts: 1

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Hi,

You may need to upgrade to a newer kernel version.

I've just installed a compact flash card to boot off in a fedora core 6 system. I was having the same dma_timer_expiry messages which was delaying the system start. I didn't have ide=nodma.
After putting this into the kernel line in menu.lst I didn't see the errors anymore and the system booted up without any delay.

kernel line:
kernel /vmlinuz-2.6.20-1.2933.fc6 ide=nodma ro root=/dev/VolGroup00/root rhgb
 
  


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