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My questions is as simple as the title: it is good and safe to use debian6 software raid?
How safe it is?
Can i have a software RAID configuration backup?
How can i deal/recover with/from a HDD problem?

I've been reading a lot over the internet, but everyone is talking 'bout how to configure. I already managed to configure and install a Debian squeeze software RAID, but, will the grub boot loader be installed in both disk, or should i do that manually??


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This depends also on the RAID level used - as a rule of thumb: RAID1 is reliable but storage-hungry, RAID5 is problematic, RAID6 has both advantages and drawbacks. Don't even think about RAID0. RAID10 is an option, but not something I'd recommend for a beginner (pardon my assumption). See also: – Piskvor Apr 11 '13 at 14:24
up vote 1 down vote accepted


Linux (and Debian) software RAID is arguably more reliable than hardware RAID.

You can back up /etc/mdadm/mdadm.conf

Read mdadm(8) documentation.

I can't remember if squeeze will automatically install grub on both disks, but you can verify and do it easily enough your self afterwards. Just grub-install /dev/sd?

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Thanks for the answer. So, if i backup the mdadm.conf, in the future i can change a damaged disk, put another, restore the file, and everything is ok again? – Castro Roy Apr 11 '13 at 15:23
You shouldn't need to restore the file. I've replaced disks without doing that. But backing it up can provide some extra security in case something fails spectacularly. – ptman Apr 11 '13 at 18:06

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