Re: I LOVE RAID 5!!!!!!!!!!!!!!!!!!!!!

From: Francisco Huezo <fhuezo@mh.gob.sv> > >I did this test in my box, I wrote 100 MB in two filesystem, >one of them was in RAID5 and another not. The two filesystem was over the >same >kind of disk. > >Well I got this values: > >Filesystem without raid5: 8500 KB/s >Filesystem with raid5: 2200 KB/s > >In fact, the write throughput is ones of cost. But a huge cache can hide this. This isn't what scares me. The fact that no-one ever seems to validate parity is what scares me. >Maybe, you should do your own test and evaluate the results. >Here there are two tip how you can measure the write throughput. >if you use to be a raw devices >time ( dd if=/dev/disk01 of=/dev/disck02 ) >otherwise >time ( cp file1 file2 ) > >El Wed, 01 Nov 2000, malc_p@my-deja.com escribi': > > ALL RIGHT. Now I've got your attention, please ignore the subject line. > > What I need to know (in order to overrule an IT manager who is > > determined to install a RAID setup and won't listen to any arguments > > against) is exactly WHAT the disadvantages / advantages are between > > using RAID and JBOD. I tried earlier but the only reply I got was from > > one Mr. O. Clown (thanx, btw). > > I think I need to push JBOD but there's a huge difference between gut > > feeling and reasoned debate. > > Exactly why does Art hate RAID 5 so much? He keeps saying NO RAID 5! NO > > RAID 5! etc. ad nauseam but WHY? > > > > TIA > > > > MAlc > > > > > > Sent via Deja.com http://www.deja.com/ > > Before you buy. >-- >Francisco Huezo >Administrador de Base de Datos >Ministerio de Hacienda >Proyecto SAFI >Cond. Tres Torres, T-2, N-8 >San Salvador, El Salvador >Tel. (503) 225-3700 ext 102 >Cel: (503) 830-7469 >------------------------------------------------- >Brainbench Certified >Power Builder 6.0 >Informix DBA >Unix Administration ( General ) >http://www.brainbench.com/transcript.jsp?pid=23525 >-------------------------------------------------- >Moving to Linux is more evolution than revolution. _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.