Re: [PERFORM] [GENERAL] Arguments Pro/Contra Software Raid

2006-05-10 Thread Douglas McNaught
Scott Marlowe <[EMAIL PROTECTED]> writes: > On Tue, 2006-05-09 at 20:02, Bruce Momjian wrote: >> You do if the controller thinks the data is already on the drives and >> removes it from its cache. > > Bruce, re-read what I wrote. The escalades tell the drives to TURN OFF > THEIR OWN CACHE. Some

Re: [PERFORM] [GENERAL] Arguments Pro/Contra Software Raid

2006-05-10 Thread Douglas McNaught
Greg Stark <[EMAIL PROTECTED]> writes: > Douglas McNaught <[EMAIL PROTECTED]> writes: >> Correct me if I'm wrong, but I've never heard of a 15kRPM SATA drive. > > Well, dollar for dollar you would get the best performance from slower drives > anyways since

Re: [PERFORM] [GENERAL] Arguments Pro/Contra Software Raid

2006-05-09 Thread Douglas McNaught
Vivek Khera <[EMAIL PROTECTED]> writes: > On May 9, 2006, at 11:51 AM, Joshua D. Drake wrote: > >> And dollar for dollar, SCSI will NOT be faster nor have the hard >> drive capacity that you will get with SATA. > > Does this hold true still under heavy concurrent-write loads? I'm > preparing yet