![Gentoo Install Grub Raid Gentoo Install Grub Raid](http://farm5.static.flickr.com/4039/4537099427_5e48d32847_b.jpg)
Installing with Fake RAID - Arch. Wiki. The purpose of this guide is to enable use of a RAID set created by the on- board BIOS RAID controller and thereby allow dual- booting of Linux and Windows from partitions inside the RAID set using GRUB. When using so- called . Hardware RAID controllers are expensive and proprietary.
To fill this gap, cheap . During early stage boot- up, the RAID is implemented by the firmware.
When a protected- mode operating system kernel such as Linux or a modern version of Microsoft Windows is loaded, the drivers take over. These controllers are described by their manufacturers as RAID controllers, and it is rarely made clear to purchasers that the burden of RAID processing is borne by the host computer's central processing unit - - not the RAID controller itself - - thus introducing the aforementioned CPU overhead which hardware controllers do not suffer from. Firmware controllers often can only use certain types of hard drives in their RAID arrays (e. SATA for Intel Matrix RAID, as there is neither SCSI nor PATA support in modern Intel ICH southbridges; however, motherboard makers implement RAID controllers outside of the southbridge on some motherboards). Before their introduction, a . However, be aware that not all BIOS RAID implementations support drive rebuilding. Instead they rely on non- linux software to perform the rebuild.
If your system cannot rebuild a drive in the BIOS RAID setup utility, you are strongly encouraged to use mdraid (pure Linux Software Raid via mdadm - see RAID) instead of dmraid or you will find yourself unable to rebuild an array in case of a drive failure - or unable to retrieve information from your array in case of a motherboard failure without a lot of additional work. For Linux 2. 6 the device- mapper framework can, among other nice things like LVM and EVMS, do the same kind of work as ATARAID in 2. Whilst the new code handling the RAID I/O still runs in the kernel, device- mapper is generally configured by a userspace application. It was clear that when using the device- mapper for RAID, detection would go to userspace.
The controllers supported are (mostly cheap) fake RAID IDE/SATA controllers which contain BIOS functions. Common examples include: Promise Fast. Trak controllers; High. Point HPT3. 7x; Intel Matrix RAID; Silicon Image Medley; and NVIDIA n. Force. Btw, it appears that Intel now recommends mdadm instead of dmraid (see Discussion). What you do with your hardware is only your own fault. Data on RAID stripes is highly vulnerable to disc failures.
Create regular backups or consider using mirror sets. Consider yourself warned! Open up any needed guides (Installation guide) on another machine.
First unmerge any existing grub; build and install the code from. Exit the install; exit umount /mnt/gentoo/proc umount /mnt/gentoo/dev umount /dev/md2 umount /dev/md5. Gentoo-zfs-install - Script files.
![Gentoo Install Grub Raid Gentoo Install Grub Raid](http://2.bp.blogspot.com/-uxv_qcoHs0A/TaBiECnrTOI/AAAAAAAAABQ/SVxVMXkyJHQ/s1600/Rapha%25C3%25ABl+Zacharie+de+IZARRA+-+Warloy-Baillon+-+Farra+FAWCETT+%25282%2529.jpg)
If you do not have access to another machine, print it out. Download the latest Arch Linux install image. Backup all important files since everything on the target partitions will be destroyed. Configure RAID sets Warning: If your drives are not already configured as RAID and Windows is already installed, switching to . During boot, enter the RAID setup utility. Tip: See your motherboard documentation for details.
I keep getting file not found errors in grub.
- As a previously mentioned in last tutorial about Gentoo Linux Installation is a long and difficult task which requires extra time. So, will continue from where.
- Linux Software Raid Wiki; Gentoo/x86 Installation Tips and Tricks for use of mdadm to create RAID arrays.
- Installing Gentoo with GRUB2, GPT, LUKS and software raid. Now lets create the raid arrays. Install GRUB on all devices and generate the config.
- Installing with Fake RAID. Jump to: navigation, search. Installing with Software RAID or LVM.
The exact procedure may vary. Boot the installer. See Installation guide#Pre- installation for details. Using mdadm is highly recommended.
You could use an older Release: 2. Note that you must correct your kernel name and initrd name in grubs menu. Example output. /dev/mapper/control < - Created by device- mapper; if present, device- mapper is likely functioning. If it is, then dmraid does not support this controller or there are no RAID sets on the system (check RAID BIOS setup again). If correct, then you may be forced to use software RAID (this means no dual- booted RAID system on this controller).
For example. # modprobe sata. Switch back to tty. Create the proper partitions the normal way. Tip: This would be a good time to install the . If installing Windows XP to . When this is done, change them back to type .
Of course, a reboot unfortunately requires some of the above steps to be repeated. Mounting the filesystem. If - - and this is probably the case - - you do not find your newly created partitions under Manually configure block devices, filesystems and mountpoints. Deactivate all device- mapper nodes: # dmsetup remove. Warning: NEVER delete a partition in cfdisk to create 2 partitions with dmraid after Manually configure block devices, filesystems and mountpoints have been set. If using a mirrored (RAID 1) array, additionally add dm. You could edit /etc/default/grub to modify the configure (timeout, color, etc) before grub- mkconfig.
In this scenario, one must resolve the problem from within another OS (e. Windows) or via the BIOS/chipset RAID utility. This can effect both the normal and LTS kernel images. Booting the 'Fallback' kernel image should work.
The error will look something like this. Activating dmraid arrays.. To prevent mdadm from running, move the udev rule that is responsible out of the way.
No block devices for partitions on existing RAID array. If your existing array, set up before attempting to install arch, appears in /dev/mapper/raidnamehere, but does not have any partitions (raidnamehere. RAID partitions. Unfortunately, you may have to repartition from scratch.