Date: Fri, 18 Dec 2009 13:25:12 +0300 From: "Alexander Zagrebin" <alexz@visp.ru> To: <freebsd-current@freebsd.org> Subject: RE: 8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related problem) Message-ID: <2252F3A1382A46E9B31273F4CD30DE49@vosz.local> In-Reply-To: <4C1C2598-4157-4B04-8DB8-C84F353AB8B8@nevada.net.nz> References: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local><4B2A341C.5000802@clearchain.com><6D3B0162A2134CAEA9F4DF5BC03707AA@vosz.local> <4C1C2598-4157-4B04-8DB8-C84F353AB8B8@nevada.net.nz>
next in thread | previous in thread | raw e-mail | index | archive | help
> > May be a problem is in ata? WD15EADS is a "green" series of drives. > > The WD green drives have a feature called Time Limited Error > Recovery > where the disk can spend several minutes trying to read a bad > block etc. > > It plays havoc with RAID arrays which is why WD recommend you don't > use the green drives in arrays. They have more info about the > "feature" in the WD FAQ/knowledgebase I think this recommendation is related mostly to hardware raid controllers. Also, if to suppose the such drive errors, then "reallocated sectors count" in the SMART wouldn't be zero. But SMART data is ok. $ sudo smartctl -A /dev/ad6 | grep -e "^ID" -e "Reallocated_Sector_Ct" ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 -- Alexander Zagrebin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?2252F3A1382A46E9B31273F4CD30DE49>