RE: Informix and RAID

Willem Roos said: > > We use IBM Shark (the 800 model) which can do both RAID5 & 10. For very > sequential I/O RAID5 is even faster than RAID10 (as quoted by IBM). > > This, i think, is because of the physical configuration of the disks in > groups. The maximum number of disks participating in a RAID > configuration is 8. Hence RAID10 gives you a stripe of 4 disks, and > RAID5 gives you a stripe of 7 disks (3 and 6 resp. when the hot spare is > carried in the group). > > So there's a case where RAID5 gets close to, and some times even beats, > RAID10 :-! Yep, right up until you lose that second disk in the RAID pack. -- Bye now, Obnoxio "C'est pas parce qu'on n'a rien ' dire qu'il faut fermer sa gueule" - Coluche "I'm trying to see things your way, but I can't get my head up my ass" - JCH "Ogni uomo mi guarda come se fossi una testa di cazzo" - Marco I went to the airport to check in and they asked what I did because I looked like a terrorist. I said I was a comedian. They said, "Say something funny then." I told them I had just graduated from flying school. -- Ahmed Ahmed sending to informix-list