http://motomastyle.com/home/ http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_46 Glad you appreciated the article Chuck! Fri, 19 Feb 2010 05:21:23 -0500 Motoma http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_46 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_45 Offensive or stupid...no. Genious...yes. Thank you. Mon, 15 Feb 2010 15:56:25 -0500 Chuck http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_45 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_43 You're right /dev/kev, neither losetup nor mdadm need partitioned devices in order to do their work. Thank you for the correction! Motoma Mon, 02 Nov 2009 04:16:12 -0500 Motoma http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_43 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_42 Surely the fdisk partitioning of the files is unnecessary? Just use losetup without any offset to get loopback devices that can be fed to mdadm... eg. something like dd of=nfsmountpoint/image bs=1024 count=0 seek=1M dd of=smbmountpoint/image bs=1024 count=0 seek=1M losetup -f nfsmountpoint/image losetup -f smbmountpoint/image mdadm -C /dev/md0 -l1 -n2 /dev/loop{0,1} mke2fs /dev/md0 mount /dev/md0 /mnt/tmp Wed, 28 Oct 2009 15:08:49 -0400 /dev/kev http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_42 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_35 Glad to hear it tdowg1. If you have any questions regarding this, feel free to email me (motoma at gmail). Thu, 16 Jul 2009 20:00:16 -0400 Motoma http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_35 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_34 Thanks--By seeing what the set of cmds+operations are to use, you helped me to create my first file-based/backed raid array! (I didn't impelement the nfs or smb part... ) ......sweeeeeeeeeeeet.... Thu, 16 Jul 2009 13:17:06 -0400 tdowg1 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_34 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_8 This is the first step-by-step discussion I have found about how to set up network RAID. I am trying to do this for an iSCSI SAN I am creating. Being a linux newbie I am unsure about how to apply your solution to my problem. Currently, I have two CentOS servers running iSCSI acting as initiators and two storage boxes running iSCSI target. Ideally, there would be n storage boxes and using network RAID only n-1 boxes would be required for the data to stay available. I have successfully allowed both storage boxes to appear as disks via iSCSI on both the servers, now I have to use software RAID to make one network RAID device which I will then use inside GFS. It seems you are building a RAID device using files "masquerading" as disks, but I have iSCSI disks so should I create files that use all the dive space on my iSCSI disks and follow your steps or can I shortcut these steps as I have disks available? I intend to do some research to better understand what you are doing, but I thought there was no harm in asking. Thanks in advance for any help you can give. Thu, 29 May 2008 13:16:44 -0400 Michael http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_8 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_7 Is there a benchmark or something to see how well it performs? Thu, 29 May 2008 13:15:43 -0400 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_7 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_6 Man, this is sweet, I've got a bunch of crap machines laying around and now I can use them to provide redundancy via a network RAID setup. Thanks for the great article! Thu, 29 May 2008 13:15:29 -0400 chrisd http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_6 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_5 Hi I have realized the same concept with iSCSI protocol. The last step is put the softraid under heartbeat control to have a fault tolerant system. Thu, 29 May 2008 13:14:58 -0400 http://motomastyle.com/network-raid-storage-proof-of-concept/#PageComment_5