Hi,
I tried setting "using_dma" flag for my 20GB Seagate drive and this is
what I got:
[root@Gaurav] ~# hdparm -d1 /dev/hda
/dev/hda:
setting using_dma to 1 (on)
using_dma = 1 (on)
[root@Gaurav] ~# hdparm -tT /dev/hda
/dev/hda:
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
hda: DMA disabled
ide0: reset: success
Timing buffer-cache reads: 128 MB in 2.95 seconds = 43.39 MB/sec
Timing buffered disk reads: 64 MB in 12.59 seconds = 5.08 MB/sec
hdparm with -c1 and -a1 options works fine but the performance gain is
only on buffered disk reads and that to only ~7 MB/sec.
Has anybody seen this behavior? The HDD is new and free of bad sectors.
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