Date: Wed, 15 Dec 1999 06:52:32 +1100 From: Greg Lehey <grog@lemis.com> To: Soren Schmidt <sos@freebsd.dk> Cc: joeo@nks.net, freebsd-current@FreeBSD.ORG Subject: Fallback to PIO (was: Errors from the ata disk driver) Message-ID: <19991215065232.A456@mojave.worldwide.lemis.com> In-Reply-To: <199912130803.JAA33772@freebsd.dk>; from sos@freebsd.dk on Mon, Dec 13, 1999 at 09:03:16AM %2B0100 References: <Pine.LNX.4.10.9912111531070.14140-100000@homer.mkintl.com> <199912130803.JAA33772@freebsd.dk>
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On Monday, 13 December 1999 at 9:03:16 +0100, Soren Schmidt wrote: > It seems joeo@nks.net wrote: >> Will the backdown to PIO mode be permanent till the next reboot of the >> machine, or will the driver be able to attempt to return to DMA mode after >> a timeout period. I'm only seeing these errors under really heavy disk >> activity (mutlitple nfs readers and writers plus rsync/mirror jobs to the >> vinum volume in question). > > The fallback is permanent, but it only occurs after 3 retries on the > failed request. If it fails 3 times in a row, there is something > really wrong on that channel, ie bad cableing etc etc... Wouldn't it be possible to find some way to manually reenable DMA? Having to reboot seems rather hard. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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