Elastix appliance NLX 4000HR. The NLX4000 in conjunction with our Elastix software becomes a powerful unified. RAID and easy. Get your Elastix NLX4000 from the experts. Elastix NLX4000 IP PBX Appliance. When you purchase an Elastix. OpenVox IX132B2R Elastix Asterisk IPPBX 2CoreATOM 2G 500G RAID 1 ISDN BRI. FreePBX or trixbox IPPBX software. Product information. How. TosSoftware. RAIDon. Cent. OS5 Cent. OS Wiki. This article addresses an approach for setting up of software mdraid RAID1 at install time on systems without a true hardware RAID controller. It is NOT supported by the Cent. OS project it is NOT a recommended approach for non hobby users see the Design Consideration note, infra. Rather this article is written to document an approach involving much local experimentation, to end up with a fragile result that is not updated when a software update installs a new kernel. We do NOT recommend it. Elastix Unified Communications Software. The NLX4000 in conjunction with our Elastix software becomes a. The Elastix NLX4000 is a powerful communications. Download Checkpoint Smartdashboard Download. Hardware RAID 1 2x Gigabit Ethernet. ElxAppNote-20140405-Chapter-6-4.jpg' alt='Elastix Software Raid Program' title='Elastix Software Raid Program' />Years of experience demonstrate that is is highly likely that you WILL forget to do a bootloader refresh, and run a greater risk of losing data, than the theoretical risk of a hard drive failure. Unsupported means when you appear and ask about this article in the centos IRC channel, the knowledgeable channel regulars will tell you it is NOT SUPPORTED and DO NOT DO THAT. Design consideration Is it sensible to even be using RAID for the boot partition The content at mountpoint boot is normally placed on a native non RAID partition. It is relatively small in size under 2. As such it is not difficult to gain redundancy of that data with a simple copy, post chnage, to a location under RAID redundancy AFTER an initial installation AND after each update of the kernel. You might do so with a small script such as this RAID protected copy of that partition. RAID is of course not a backup solution. Using this approach avoids the rather kludgy and fragile approach outlined below. Elastix Software Raid 0' title='Elastix Software Raid 0' />The actions described in this write up can damage an existing filesystem. Please experiment first on a test box and then only proceed after creating current and proven viable backups. Never blindly copypaste commands, particularly as root, without a thorough understanding of their effects. This approach implies hardware controllers that expose the raw block devices directly to the operating system. It is also assumed that the devices involved are devsda and devsdb for the first two SATA or SCSI drives. Replace devsda and devsdb with devhda and devhdb or possibly devhdc for a secondary master respectively for the first two parallel ATA drives. Adjust drive designations as required for other configurations. Be very careful to adjust commands for your situation and not simply blindly follow the procedure. Booting will only work with boot on non RAID or RAID1 partitions. Software Raid 10RAID0, RAID5 or other RAID types will not work for boot and RAID0 striping with no redundancy is not recommended for critical partitions. With the boot constraints satisfied, the root and other partitions may be RAID5 or another type however, these options are not covered in this example. The dd commands and the installation procedure described below will destroy all information on the disks. If you have data on the drives that you need access to, please backup the drives and test the adequacy of the backups, first. Section One. Disable any fake RAID in the motherboard or RAID controller BIOS so that it acts as a normal controller usually either ATA or SATA, possibly SCSI. It may be necessary to overwrite the partition tables if fake raid has previously been used on the disks. Do not load a RAID driver. The following commands may be performed on the 2nd virtual console Ctrl Alt F2 during a graphical install before partitioning, or booted in rescue mode from installation media, or from a Live. CD. The partition tables of the devices will be zeroed out and all contents of the drives lost Begin graphical installation of Cent. OS. May need to use boot linux nodmraid or Press Tab at the initial installation selection menu and add nodmraid to the boot commands. Customize partitions and remove all partitions, including LVMs, for a fresh start Create an 1. MB software RAID partition on sda and sdb for boot Create a software RAID partition on sda and sdb for swap. This partition size is based on the amount of RAM and personal preferences. The example uses 1. GB. This is going to be RAIDed swap. Create a software RAID partition on sda and sdb for and fill to maximum allowable size Click the RAID button, create a RAID device Pick the two 1. MB partitions, mount point boot, filesystem type ext. RAID1 default RAID device should be md. OK Click the RAID button, create a RAID device Pick the two 1. GB partitions, filesystem type swap, RAID1 default RAID device should be md. OK Click the RAID button, create a RAID device Pick the two large partitions, mount point, filesystem type ext. RAID1 default RAID device should be md. OK Your partitions are complete. Your screen should look similar to this RAID Devices devmd. GBs Hard Drives devsda. RAID no check mark 1. RAID no check mark 1. RAID no check mark lots of GBs. RAID no check mark 1. RAID no check mark 1. RAID no check mark lots of GBsClick next to go to the GRUB bootloader screen. It should default to installing GRUB to devsda, click Next Continue installing Cent. OS, selecting desired packages Proceed to Section Two after Cent. OS is installed and the system has been rebooted. Do not update Cent. OS, do not do anything else Section Two. This will assure that both members of the RAID1 boot are bootable. Repeat after a disk failurereplacement. Method 1 in GRUB at boot. Stop at the GRUB menu and enter the c option, which gives you the GRUB prompt. Then grub root hd. Hit the ESC key to get back to the GRUB menu, and boot normally. Perform steps 1 and 5 8 in Method 2. Method 2 in GRUB on the running system. Make sure youre root. Input the command sbingrub, hit Enter Enter the following commands in the GRUB shell grub device hd. Cross your fingers. Type in reboot, hit Enter. Once youre booted up, do a system update. Reboot if the kernel or glibc was updated. Imperialismus Spiel. Check that youre actually running the updated kernel, if any, by typing uname a, hit Enter Done This guide is based on information provided by Tim. Verhoeven of centos on irc. Cent. OS Forum thread and extensively edited with feedback from Forum users and centos docs. The above procedure assumes a graphical installation. Creating RAID 1 devices in text mode can be done, but is quite tedious and exacting. You first need to create each RAID member partition on each disk and specify only one disk for each. If you dont specify a unique disk either sda OR sdb for each partition, then Disk Druid seems to want to mess around with the layout when you create the RAID devices. At the stage of creating the RAID devices be sure to only select the desired RAID partitions for each device and deselect others as the RAID devices are created. It should be possible to apply a similar approach to on RAID1 without a boot. Heres a link to a Fedora guide using that approach that should be largely applicable. The Fedora article also contains very good instructions on recovery using mdadm. Additional RAID articles on the Wiki include How to Convert a Cent. OS 5 System to RAID1 Using a Rescue Disk and How to install Cent. OS 5 on a software partitionable RAID1. General articles on software RAID Nice Linux Journal article on Recovery of RAID and LVM2 Volumes. Some controllers claim to be hardware RAID but require drivers to function, similar to winmodems. These controllers are often called fake RAID or fraid and are usually better used on Cent. OS with the RAID function disabled. This external article addresses the issues in some detail.