On Wednesday 16 March 2011 09:53:37 Florian Philipp wrote: > Am 15.03.2011 07:50, schrieb Matthew Marlowe: > >> My problem is that LVM2 is not supported in parted which is the > >> recommended tool to deal with this. > >> > >> I suspect I only need to map the individual PE to a particular start > >> sector on each drive, not btrfs, but then there is stripe/block sizes > >> to > >> consider as well ... WD also are recommending 1mb sector boundaries > >> for > >> best performance - I can see a reinstall coming up :) > > > > I have on my workstation: > > 2 WD 2TB Black Drives > > 5 WD 2TB RE4 Drives > > > > Some notes: > > - The black drives have horrible reliability, poor sector remapping, and > > have certain standard drive features to make them unusable in raid. I > > would not buy them again. I'm not sure how similar the green drives > > are. > > Green drives also seem to be affected: > http://doug.warner.fm/d/blog/2009/11/Western-Digital-15TB-Green-Drives-Not-y > our-Linux-Software-RAID
I have 6 Green drives (WDC WD15EARS) in a RAID5 and I have not seen any issues. Only issue I saw was 1 drive with "reallocated" sectors as also mentioned by one of the commenters on that page. Replaced that drive and no further problems so far. I did, however, spent time to align the sectors correctly for the Raid- partitions, striping, LVM blocksize and the mkfs-statements. Without those, performance was really bad. I would prefer to see proper support for 4K-sector-size drives. -- Joost
