Hello,
I have an IDE hard disk that often gives a DMA error at boot up:
Code:
[ 0.000000] Linux version 2.6.20-16-generic (root@terranova) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4)) #2 SMP Sun Sep 23 19:50:39 UTC 2007 (Ubuntu 2.6.20-16.32-generic)
...
[ 22.263363] Kernel command line: root=UUID=b72ccba1-5c78-4b9d-9c8d-7429fd3b7695 vga=794 hda=nodma ro splash
[ 22.263383] ide_setup: hda=nodma -- BAD OPTION
...
[ 30.130928] hda: Host Protected Area disabled.
[ 30.130932] hda: 40132503 sectors (20547 MB) w/1902KiB Cache, CHS=39813/16/63, UDMA(100)
[ 30.130937] hda: cache flushes not supported
[ 30.130974] hda:<5>SCSI device sda: 320173056 512-byte hdwr sectors (163929 MB)
[ 30.132551] sda: Write Protect is off
[ 30.132553] sda: Mode Sense: 00 3a 00 00
[ 30.132565] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 30.132604] SCSI device sda: 320173056 512-byte hdwr sectors (163929 MB)
[ 30.132611] sda: Write Protect is off
[ 30.132613] sda: Mode Sense: 00 3a 00 00
[ 30.132624] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 30.132627] sda: hda1
[ 30.146269] hdc: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33)
[ 30.146278] Uniform CD-ROM driver Revision: 3.20
...
[ 50.129523] hda: dma_timer_expiry: dma status == 0x60
[ 50.129527] hda: DMA timeout retry
[ 50.129529] hda: timeout waiting for DMA
[ 55.124850] hda: status timeout: status=0xd0 { Busy }
[ 55.124852] ide: failed opcode was: unknown
[ 55.124878] hda: drive not ready for command
[ 55.221105] ide0: reset: success
[ 75.232034] hda: dma_timer_expiry: dma status == 0x60
[ 75.232038] hda: DMA timeout retry
[ 75.232039] hda: timeout waiting for DMA
[ 80.227042] hda: status timeout: status=0xd0 { Busy }
[ 80.227044] ide: failed opcode was: unknown
[ 80.227069] hda: drive not ready for command
[ 80.275696] ide0: reset: success
[ 100.282631] hda: dma_timer_expiry: dma status == 0x60
[ 100.282634] hda: DMA timeout retry
[ 100.282635] hda: timeout waiting for DMA
[ 105.277321] hda: status timeout: status=0xd0 { Busy }
[ 105.277323] ide: failed opcode was: unknown
[ 105.277348] hda: drive not ready for command
[ 105.326293] ide0: reset: success
[ 125.337222] hda: dma_timer_expiry: dma status == 0x60
[ 125.337224] hda: DMA timeout retry
[ 125.337226] hda: timeout waiting for DMA
[ 130.331593] hda: status timeout: status=0xd0 { Busy }
[ 130.331595] ide: failed opcode was: unknown
[ 130.331620] hda: drive not ready for command
[ 130.380884] ide0: reset: success
[ 130.494085] hda: DMA disabled
hda is a hard disk that I only use to boot to windows time to time, so I could disable DMA with no problem. I have tried to do that unsuccessfully by adding at boot hda=nodma,
but this is indicated as a bad option.
$ sudo hdparm /dev/hda
Code:
/dev/hda:
multcount = 0 (off)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 39813/16/63, sectors = 40132503, start = 0
$ sudo hdparm -i /dev/hda
Code:
/dev/hda:
Model=QUANTUM FIREBALLP AS20.5, FwRev=A1Y.1500, SerialNo=792119430295
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
BuffType=DualPortCache, BuffSize=1902kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=40130390
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma3 udma4 *udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5
* signifies the current active mode
The error is not very problematic and DMA is disabled after several trials, but it takes a lot of time at every boot.
Thank you for any suggestion.
