Comments on: Create a Linux software RAID array http://www.tech-recipes.com/rx/3923/create-a-linux-software-raid-array/ Computer and technology tutorials and guides Sun, 22 Nov 2009 03:12:08 -0800 http://wordpress.org/?v=2.8.6 hourly 1 By: Linux beginner http://www.tech-recipes.com/rx/3923/create-a-linux-software-raid-array/comment-page-1/#comment-10196 Linux beginner Thu, 09 Apr 2009 09:55:01 +0000 http://www.tech-recipes.com/?p=3923#comment-10196 Thanks for this GREAT post. It cleared up so many of my RAID problems that other just didn't mention in their RAID-How-Tos! Unfortunately others appear to have missed your point entirely and played the: I am great at Linux now so you are stupid for having to start somewhere, card! Thanks for this GREAT post. It cleared up so many of my RAID problems that other just didn't mention in their RAID-How-Tos! Unfortunately others appear to have missed your point entirely and played the: I am great at Linux now so you are stupid for having to start somewhere, card!

]]> By: Robert http://www.tech-recipes.com/rx/3923/create-a-linux-software-raid-array/comment-page-1/#comment-9683 Robert Sun, 22 Mar 2009 23:38:09 +0000 http://www.tech-recipes.com/?p=3923#comment-9683 no.<br>first, why are you making a raid of paritions of the hard drives. you use full drives, and only full drives to make your raid arrays. second, make sure to use parted and put a GUID table on. youre probably still running around with an MS-DOS partition table (fdisk). anything beyond 2TB will be useless if yore using fdisk-type partition tables.<br><br>First, backup your data, and wipe all 3 hard drives clean. You don't want to raid parts of each hard drive. Its useless. do parted /dev/sda, mklabel, gpt. GPT is the GUID partition table, far greater than the MSDOS part. table in both capacity and usefulness otherwise (contains redundancy, etc. wiki it.)<br><br>Anywho, wipe the 3 hard drives, put the GUID partition table and whatever filesystem you like (XFS is my personal favorite when handling music/video files....it handles large files better. If youre going for small files, use Reiserfs. These are the only two filesystems you should consider. Ever.) Now you have /dev/sda1 created with XFS, on the whole drive, and two blank drives. Then, do mdadm --create /dev/md0 -l5 -d3 /dev/sda1 /dev/sdb /dev /sdc, itll take time, obviously, then youre ready to mount.<br><br>If you're using the partitions because you have different sized drives, you shouldnt be making a raid anyways. RAID requires planning, and obviously you didnt.<br><br>In short, if you're still using ubuntu, and you think you can try some cool server admin stuff, youre probably wrong. Ubuntu is linux for human beings. Server admins aren't human beings. Don't try to be like them. no.
first, why are you making a raid of paritions of the hard drives. you use full drives, and only full drives to make your raid arrays. second, make sure to use parted and put a GUID table on. youre probably still running around with an MS-DOS partition table (fdisk). anything beyond 2TB will be useless if yore using fdisk-type partition tables.

First, backup your data, and wipe all 3 hard drives clean. You don't want to raid parts of each hard drive. Its useless. do parted /dev/sda, mklabel, gpt. GPT is the GUID partition table, far greater than the MSDOS part. table in both capacity and usefulness otherwise (contains redundancy, etc. wiki it.)

Anywho, wipe the 3 hard drives, put the GUID partition table and whatever filesystem you like (XFS is my personal favorite when handling music/video files….it handles large files better. If youre going for small files, use Reiserfs. These are the only two filesystems you should consider. Ever.) Now you have /dev/sda1 created with XFS, on the whole drive, and two blank drives. Then, do mdadm –create /dev/md0 -l5 -d3 /dev/sda1 /dev/sdb /dev /sdc, itll take time, obviously, then youre ready to mount.

If you're using the partitions because you have different sized drives, you shouldnt be making a raid anyways. RAID requires planning, and obviously you didnt.

In short, if you're still using ubuntu, and you think you can try some cool server admin stuff, youre probably wrong. Ubuntu is linux for human beings. Server admins aren't human beings. Don't try to be like them.

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