Date: Wed, 23 Apr 2008 15:58:23 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: sos@FreeBSD.org Cc: current@FreeBSD.org Subject: Re: ATA problem in Parallels: warnings -> failures Message-ID: <20080423155744.D64388@fledge.watson.org> In-Reply-To: <20080417144424.D71628@fledge.watson.org> References: <20080417144424.D71628@fledge.watson.org>
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On Thu, 17 Apr 2008, Robert Watson wrote: > Since my most recent kernel update, the intermittent TIMEOUT - READ_DMA > warnings I get on my parallels install appear to have become somewhat less > innocuous: > > ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=38669679 > ad0: FAILURE - already active DMA on this device > ad0: setting up DMA failed > g_vfs_done():ad0s1e[READ(offset=18188230656, length=2048)]error = 5 > cvs update: in directory modules/tx: > cvs [update aborted]: cannot read CVS/Repository: Input/output error > > In the past, this appeared to be a symptom of long and unexplained delays in > Parallel's ATA -> image file operation, but were not harmful as the retried > operation succeeded. However, it seems that this is no longer the case, > with errors exposed to higher levels of the file system. Do you have any > suggestions? Your recent commits appear now to have resolved this problem. I'm still getting the usual TIMEOUT's for read and write DMA that I always get in Parallels, but no more corrupted UFS, as far as I can tell, anyway. :-) Thanks, Robert N M Watson Computer Laboratory University of Cambridge
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