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Old 11-03-2008, 08:59 PM
"Christopher Lemire"
Default Need help with raid layout

I've been using Raid 1 for a while now. It increases my read speeds a little bit I guess, but I haven't had a hard drive fail where it ever did me any good. I just yanked a hard drive that was running in the raid out of my computer and watched Linux not crash and continue to run uninterrupted and also did simulated failures and rebuilding with mdadm. What I really want is performance. Raid 0 offers more performance than 5 and raid is not a backup solution, so what I want to do is this. Many people complains about raid 0, but I have an idea. I want cron jobs to run rsync for backups synchronizing my home folder to a new 640 gb Seagate hdd I'm looking at buying. The backups should be automated and done often, so, I can have @reboot in my crontab and rsync run by cron at times I am not likely to be doing anything or much with my computer. And if rsync only has to copy only new or modified files, it shouldn't take long at all to perform a backup and maybe I can have it run ever 3 hours or whenever the computer has been idle for 15 minutes. I don't know how to do that except I think gnome-screensaver-command could check if the screensaver is active and if it is, I'm not using my computer, and rsync could go to work backuping up my files. The two drives I'm using for raid 1 right now that I want to reinstall Ubuntu 8.10 with raid 0 with are both identical sata2 Seagates 320 gb drives. I want the partitioning scheme to be identical on both, but how would I do that if grub can't boot a Linux kernel that's in raid 0? I've made a /boot partition and put it in Raid 1 before but people have told me that its bad to have to have raid 1 and raid 0 that way and my performance would be lost, so how can I keep both drives with the same partitioning layout with Raid 0?

Christopher Lemire <christopher.lemire@gmail.com>
Fedora 64 bit Linux Raid Level 1

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