On Wed, Nov 7, 2012 at 01:53:47PM -0700, Scott Marlowe wrote: > On Wed, Nov 7, 2012 at 11:59 AM, Bruce Momjian <bruce@xxxxxxxxxx> wrote: > > On Sat, Oct 27, 2012 at 05:41:02PM +1100, Chris Angelico wrote: > >> On Sat, Oct 27, 2012 at 4:26 PM, Greg Smith <greg@xxxxxxxxxxxxxxx> wrote: > >> > In general, through, diskchecker.pl is the more sensitive test. If it > >> > fails, storage is unreliable for PostgreSQL, period. It's good that you've > >> > followed up by confirming the real database corruption implied by that is > >> > also visible. In general, though, that's not needed. Diskchecker says the > >> > drive is bad, you're done--don't put a database on it. Doing the database > >> > level tests is more for finding false positives: where diskchecker says the > >> > drive is OK, but perhaps there is a filesystem problem that makes it > >> > unreliable, one that it doesn't test for. > >> > >> Thanks. That's the conclusion we were coming to too, though all I've > >> seen is lost transactions and not any other form of damage. > >> > >> > What SSD are you using? The Intel 320 and 710 series models are the only > >> > SATA-connected drives still on the market I know of that pass a serious > >> > test. The other good models are direct PCI-E storage units, like the > >> > FusionIO drives. > >> > >> I don't have the specs to hand, but one of them is a Kingston drive. > >> Our local supplier is out of 320 series drives, so we were looking for > >> others; will check out the 710s. It's crazy that so few drives can > >> actually be trusted. > > > > Yes. Welcome to our craziness! > > Is there a comprehensive list of drives that have been tested on the > wiki somewhere? Our current choices seem to be the Intel 3xx series > which STILL suffer from the "whoops I'm now an 8MB drive" bug and the > very expensive SLC 7xx series Intel drives, the Hitachi Ultrastar > SSD400M, and the OCZ Vertex 2 Pro. Any particular recommendations > from those or other series from anyone would be greatly appreciated. No, I know of no official list. Greg Smith and I have tried to document some of this on the wiki: http://wiki.postgresql.org/wiki/Reliable_Writes -- Bruce Momjian <bruce@xxxxxxxxxx> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
