Messages in this thread |  | | Date | Tue, 14 Nov 2000 09:18:53 -0500 | From | Mike Dresser <> | Subject | Re: IDE0 /dev/hda performance hit in 2217 on my HW |
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check if DMA mode is still on, on your hard drive. I'm trying to remember if that behaviour changed for 2.2.17
LA Walsh wrote:
> I skimmed over the archives and didn't find a mention of this. I thought > I'd noticed this when I first installed 2217, but I was too busy to verify > it at the time. > > Simple case: > Under 2216, I can do a 'badblocks /dev/hda1 XXXXX'. Vmstat shows about > 10,000K/s average. This is consistent with 'dd' operations I use to copy > partitions for disk mirroring/backup. > > Under 2217, the xfer speed drops to near 1,000K/s. This is for both > 'badblocks' > and a 'dd' if=/dev/hda of=/dev/hdb bs=256k. In both instances, I notice > a near 90% performance degredation. > > Haven't tried any latest 2.2.18's -- has there been any work that might > have fixed this problem in 2218. Am I the only person who noticed this? > I.e. -- maybe it's something peculiar to my HW (Inspiron 7500), > IBM DARA-22.5G HD. > > -- > L A Walsh | Trust Technology, Core Linux, SGI > law@sgi.com | Voice/Vmail: (650) 933-5338 > > - > 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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