Need help with raid layout

[Dotan Cohen]

2008/11/3 Christopher Lemire <christopher.lemire at gmail.com>:
> 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?
>

I'd keep the boot partition on sda and leave the corrosponding
partition on sdb empty. Or, you could have that partition on sdb as
swap. I don't think that you need to RAID swap if your goal is data
redundancy. Just RAID the data partitions.

-- 
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת

ä-ö-ü-ß-Ä-Ö-Ü