Software RAID-0 Sequence

woolsherpahat · Guru Joined: 09 Mar 2004 Posts: 347

Hello. I have a dual 300Mhz machine with three scsi drives. The first one is just a regular old drive with the /boot /tmp /var swap and / partitions on it. This is the boot drive. I want to configure the remaining two drives in a RAID-0 array and store my /var/www, /ftproot/ and /home directories on them. I've been following this post (https://forums.gentoo.org/viewtopic.php?t=8813&highlight=software+raid0) as well as the Software-RAID-HOWTO at tldp.org. Here's my quesiton.

Do I paritition the drives first then build the RAID array. For example if I want to have /home parition with a total allotment of 10GBs do I make a 5GB paritition on /dev/sdb and a 5GB paritition on /dev/sdc and use them as raid-disk 0 and raid-disk 1? Then I'd build the raid array right? After that I'd use mkfs.xfs to put a filesystem on it (/dev/md0), correct?

Now, I would have to do this for each directory, also?

Basicly is the sequence:Paritition, build array & then install the filesystem?

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lightvhawk0 · Guru Joined: 07 Nov 2003 Posts: 388

hmm... I think after it becomes a device you could partition it
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woolsherpahat · Guru Joined: 09 Mar 2004 Posts: 347

So I build the array, chop it up with cfdisk and then install the filesystem? I ran into problems doing that yesterday. What happened is I ended up with a series of parititions that looked like this /dev/md0p1, /dev/md0p2, etc. Upon doing a mke2fs -j /dev/md0p1 I would get the error that "Special Device did not exist". That's what lead me to believe you make the paritition's first then use them to build the array.