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On 10/24/2011 12:10 PM, Rich Braun wrote: > David Rosenstrauch <darose at darose.net> >> If you have a logical volume that spans multiple HDD's, and one of the >> disks goes bad, the file system on your LV will be corrupted/lost. (I >> think this is similar to RAID-0?) So, [installed] physical volumes >> should be redundant RAID >> devices themselves to avoid this problem. > Yes. > > And I believe I first said this here on the BLU list sometime around, oh, 2003 > or so. Motherboards almost always have 6 or more SATA connectors, brand-new > disk drives have plummeted to about $60. CPU and RAM overhead is negligible > (under 3%) when you set up software RAID1 or RAID10. And you get 2x the read > performance if you use RAID1/RAID10. > > Q.E.D., unless you're concerned about 60 bucks (or the $4 annual electric bill > per drive), then there is no reason not to install hard drives as pairs. > > Ever. > > Even if you can't spare the $60--you probably have old disk drives lying > around that you can use. For free. > > Never run Linux without RAID. > > Ever! I would agree here. I had purchased a 1TB drive to pair up with my existing 1TB drive a few years ago, but at that time there was a bug that prevented me from doing a PVCreate. The bug has been fixed and I am now running a full RAID1 and backing up to a $49 refurbished 1.5TB. Initially the 1.5TB was showing some errors, but bad blocks fixed that. I was too lazy to wipe the drive and return it. I have not had any reported errors in a while. -- Jerry Feldman <gaf at blu.org> Boston Linux and Unix PGP key id:3BC1EB90 PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66 C0AF 7CEA 30FC 3BC1 EB90
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