Re: [PERFORM] Planning a new server - help needed

2008-03-29 Thread James Mansion
Greg Smith wrote: As for SCSI vs. SATA, I collected up the usual arguments on both sides at http://www.postgresqldocs.org/index.php/SCSI_vs._IDE/SATA_Disks Why do you claim that 'More platters also means slower seeks and generally slower performance.'? On the face of it, it should mean that

Re: [PERFORM] Planning a new server - help needed

2008-03-29 Thread PFC
Why do you claim that 'More platters also means slower seeks and generally slower performance.'? More platters - more heads - heavier head assembly - slower seek time But.. More platters - higher density - less seek distance (in mm of head movement) - faster seek time As

Re: [PERFORM] Planning a new server - help needed

2008-03-29 Thread James Mansion
PFC wrote: Why do you claim that 'More platters also means slower seeks and generally slower performance.'? More platters - more heads - heavier head assembly - slower seek time Note sure I've sen a lot of evidence of that in drive specifications! Gigabyte should revamp their

Re: [PERFORM] Planning a new server - help needed

2008-03-29 Thread Greg Smith
On Sat, 29 Mar 2008, PFC wrote: Why do you claim that 'More platters also means slower seeks and generally slower performance.'? More platters - more heads - heavier head assembly - slower seek time I recall seeing many designs with more platters that have slower seek times in benchmarks,

Re: [PERFORM] Planning a new server - help needed

2008-03-29 Thread Craig Ringer
Greg Smith wrote: Gigabyte should revamp their i-RAM to use ECC RAM of a larger capacity... and longer lasting battery backup... I saw a rumor somewhere that they were close to having a new version of that using DDR2 ready, which would make it pretty easy to have 8GB on there. I'm hoping