Originally Posted by meat_helmet
Yeh raid is only good for raid 1. I used to use 2 old 80GB seagates in raid 1, and they were noticably faster than my current 500GB 7200.11 seagate.
Still, this should only be used for OS and apps as already said. Data should be on another disk and backed up.
Yeah, I agree w/ hefemeister. For the record, I did say it "keeps data safe from system crashes." A good series of tape backups are possible, and as mentioned, no, RAID shouldn't be used for backups. What I said is true, that RAID is used for keeping it safe, meaning, if one drive fails in RAID 5, you can keep data intact and change the erroneous drive, while keeping the system running. BUT the tape backups are what is going to replace data IF anything is lost.
That is the idea of RAID 5 anyway, that is what I am speaking of in this example. So I agree with Saxon, Hef, etc. on RAID shouldn't be SOLEY relied on, but in combination with a good backup scheme of tapes, or some other reliable media. I got this information from my professor who is a network professional as well (I do not include myself in that statement, I am a student). He uses RAID 0 for some not-so-critical things because of it's relative speed. RAID 1 for something else (I forgot), and RAID 5 for the critical data (payroll, databases, etc). And of course he uses differential backups to tape with an automatic disk changer system.