Date: Fri, 18 Dec 2009 13:31:07 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Alexander Zagrebin <alexz@visp.ru> Cc: freebsd-current@freebsd.org Subject: Re: 8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related problem) Message-ID: <4B2B67FB.80705@icyb.net.ua> In-Reply-To: <5C4BD0F81D1348B287B2ECD55EF283E1@vosz.local> References: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local><4C1C2598-4157-4B04-8DB8-C84F353AB8B8@nevada.net.nz><6FAA390A-1E40-4D7A-AAD5-DC72578CE974@nevada.net.nz> <200912182027.11632.doconnor@gsoft.com.au> <5C4BD0F81D1348B287B2ECD55EF283E1@vosz.local>
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on 18/12/2009 12:39 Alexander Zagrebin said the following: >> I doubt this is the problem, I have WD10EADS disks in my ZFS >> array and I >> see the same issue. >> >> It strikes me as extremely unlikely that both of us would have dud >> disks.. >> >> In any case it seems to be a general problem not limited to >> one area of >> the disk so a dud sector is an unlikely reason. > > Big thanks for confirmation! > Your confirmation is important for me. > There should be a way to define where the bug is: in the ata (or filesystem) > driver or in the drive's firmware.... Just another 'me too'. >From the moment I started using zfs and till this day I saw this pattern when writing lots data to zfs - first high throughput and then idle pause, and so on. I always thought that this is normal for ZFS (some buffering, grouping, etc). So I never complained :-) -- Andriy Gapon
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