Date: Tue, 19 Jan 2010 14:20:54 -0500 (EST) From: Charles Sprickman <spork@bway.net> To: =?ISO-8859-15?Q?Gerrit_K=FChn?= <gerrit@pmp.uni-hannover.de> Cc: freebsd-stable@freebsd.org, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: immense delayed write to file system (ZFS and UFS2), performance issues Message-ID: <alpine.OSX.2.00.1001191415250.53123@hotlap.local> In-Reply-To: <20100119134827.250abc50.gerrit@pmp.uni-hannover.de> References: <4B54C100.9080906@mail.zedat.fu-berlin.de> <4B54C5EE.5070305@pp.dyndns.biz> <201001191250.23625.doconnor@gsoft.com.au> <7346c5c61001181841j3653a7c3m32bc033c8c146a92@mail.gmail.com> <4B557B5A.8040902@pp.dyndns.biz> <20100119095736.GA71824@icarus.home.lan> <20100119110724.ec01a3ed.gerrit@pmp.uni-hannover.de> <20100119112449.GA73052@icarus.home.lan> <20100119134827.250abc50.gerrit@pmp.uni-hannover.de>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --0-149292284-1263928854=:53123 Content-Type: TEXT/PLAIN; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 8BIT On Tue, 19 Jan 2010, Gerrit Kühn wrote: > On Tue, 19 Jan 2010 03:24:49 -0800 Jeremy Chadwick > <freebsd@jdc.parodius.com> wrote about Re: immense delayed write to file > system (ZFS and UFS2), performance issues: > > JC> > JC> If you want a consumer-edition drive that's better tuned for > JC> > JC> server work, you should really be looking at the WD Caviar Black > JC> > JC> series or their RE/RE2 series. > > JC> > That's exactly what I did. I have WD-RE2 drives here that show > JC> > exactly this problem (RE2/GP)! The model number is WD1000FYPS-01ZKB0. > > JC> I should have been more specific. WD makes RE-series drives which > JC> don't have GP applied to them; those are what I was referring to. > > Well, when I bought these drives I was not aware of this issue. Buying a > drive intended for 24/7 use in RAID configurations is basically the right > idea, I think. From what was written about the GP feature back then I > could not anticipate such problems. > I would have liked to buy the 2TB drives without GP lately, but they have > lead times into April here. So I went for the GP model, which now shows > the same problem as the 1TB drive... :-( > > JC> WD1000FYPS - WD RE2-GP, 1TB, 16MB, variable rpm > JC> WD2002FYPS - WD RE4-GP, 2TB, 64MB, variable rpm > > JC> So which drive models above are experiencing a continual increase in > JC> SMART attribute 193 (Load Cycle Count)? My guess is that some of the > JC> WD Caviar Green models, and possibly all of the RE2-GP and RE4-GP > JC> models are experiencing this problem. > > I can confirm that the two models above show this problem. > Furthermore I can confirm that at least in my setup here this drive > type works fine: > > WD5001ABYS > > I have some of the RE3 drives sitting around here and will probably try > them later. I specifically bought RE3 drives recently because of the whole fiasco regarding "raid compatibility". I paid about $20 each more for these in the interest of things "just working", since I saw some debate about whether or not the TLER setting can be flipped on the "non-RAID" drives. FWIW, 4 1TB RE3's in a zfs raidz (an excerpt from bonnie++, block read/write 8G on 4G RAM): Write Read K/sec K/sec 123207 142749 Both zfs and these drives kind of surprised me, that seems pretty good for software raid with parity... Seagate is currently on my blacklist after we had a large number of them fail a year or two in the past year or two. I've had good luck so far with WD RE2 and RE3 drives. I'll probably give seagate another shot in a year or two. C > Can anyone here report anything about the fixed firmware from > <http://support.wdc.com/product/download.asp?groupid=609&sid=113&lang=en>? > Does this remedy the problem for the 1TB RE2 drive? > > JC> I say "some" with regards to WD Caviar Green since I have some which do > JC> not appear to exhibit the heads/actuator arm moved into the > JC> landing/park zone. I'm at work right now, but when I get home I can > JC> verify what models I've used which didn't experience this problem, as > JC> well as what the manufacturing date and F/W revisions are. I should > JC> note I don't have said Green drives in use (I use WD1001FALS drives > JC> now). > > Thanks for sharing this information. > > > cu > Gerrit > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > --0-149292284-1263928854=:53123--
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