similar to: RAID1 bootloader configuration on CentOS 6.x and 7

Hi, When I perform a software RAID 1 or RAID 5 installation on a LAN server with several hard disks, I wonder if GRUB already gets installed on each individual MBR, or if I have to do that manually. On CentOS 5.x and 6.x, this had to be done like this: # grub grub> device (hd0) /dev/sda grub> device (hd1) /dev/sdb grub> root (hd0,0) grub> setup (hd0) grub> root (hd1,0) grub>

Hello, I have two disks sda and sdb. One of the was broken so I have changed the broken disk with a working one. I started the server in rescue mode, and created the partional table, and added all the partitions to the software raid. *I have added the partitions to the RAID, and reboot.* # mdadm /dev/md0 --add /dev/sdb1 # mdadm /dev/md1 --add /dev/sdb2 # mdadm /dev/md2 --add /dev/sdb3 # mdadm

Hi all! Doing some tests with CentOS 5.5 on a KVM virtual machine, after doing the installation, I added a second disk. But when trying to boot from it, I get the following error: --------------------------------------------------------------------- root (hd1,0) Error 21: Selected disk does not exist --------------------------------------------------------------------- The two disks are

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all! Doing some tests with CentOS 5.5 on a KVM virtual machine, after doing the installation, I added a second disk. But when trying to boot from it, I get the following error: - --------------------------------------------------------------------- root (hd1,0) Error 21: Selected disk does not exist -

Hi All, I'm currently trying to install centos 5.4 x86-64bit on a raid 1, so if one the 2 disks fails the server will still be available. i installed grub on /dev/sda using the advanced grub configuration option during the install. after the install is done i boot in linux rescue mode , chroot the filesystem and copy grub to both drives using: grub>root (hd0,0) grub>setup (hd0)

Dear All, I have a K8S-MX Asus Athlon 64 Motherboard with a 754 pin 3000+ CPU, which I cam trying to install 4.1 Centos 64 bit. The problem seems to arise when installing onto Mirrored disks, I have noticed that from Centos 4 onwards it tries to rebuild the arrays as it installs which slows the whole process right down across all platforms I have tried it on. In addition, the install

doing that grub-install /dev/sda will give me the "corresponding BIOS device" error. But now I fixed it by doing a manual grub install. first boot with cd1 and type linux rescue at the prompt when you're at the linux prompt after detecting and mounting the partitions, do a "chroot /mnt/sysimage" then # grub --batch #grub> root (hd0,0) Filesystem type is ext2fs,

On Wed, Aug 5, 2015 at 11:11 AM, Bowie Bailey <Bowie_Bailey at buc.com> wrote: > On 8/5/2015 1:00 PM, Chris Murphy wrote: >> >> On Wed, Aug 5, 2015 at 10:52 AM, Bowie Bailey <Bowie_Bailey at buc.com> >> wrote: >>> >>> How would I go about pointing it at the partition? >>> >>> What I am currently doing is this: >>> device

Greetings - The short story is that got my new install completed with the partitioning I wanted and using software raid, but after a reboot I ended up with a grub prompt, and do not appear to have a grub.cfg file. So here is a little history of how I got here, because I know in order for anyone to help me they would subsequently ask for this information. So this post is a little long, but

I have Windows 7 on /dev/sda and CentOS 6.4 on /dev/sdb. Here are the layouts: (parted) select /dev/sda Using /dev/sda (parted) print Model: ATA WDC WD10EZEX-00Z (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 374MB 373MB primary ntfs boot

On 8/5/2015 1:00 PM, Chris Murphy wrote: > On Wed, Aug 5, 2015 at 10:52 AM, Bowie Bailey <Bowie_Bailey at buc.com> wrote: >> How would I go about pointing it at the partition? >> >> What I am currently doing is this: >> device (hd0) /dev/hdg >> root (hd0,0) >> setup (hd0) > > setup (hd1,0) > > It's hd1 if your device map is correct and

On Wed, Aug 5, 2015 at 10:52 AM, Bowie Bailey <Bowie_Bailey at buc.com> wrote: > > On 8/5/2015 12:34 PM, Chris Murphy wrote: >> >> On Wed, Aug 5, 2015 at 9:12 AM, Bowie Bailey <Bowie_Bailey at buc.com> wrote: >>> >>> I am trying to upgrade my system from 500GB drives to 1TB. >> >> I'm going to guess that there are no IDE drives that

On 08/11/16 02:33, Nicolas Kovacs wrote: > Hi, > > When I perform a software RAID 1 or RAID 5 installation on a LAN server > with several hard disks, I wonder if GRUB already gets installed on each > individual MBR, or if I have to do that manually. On CentOS 5.x and 6.x, > this had to be done like this: > > # grub > grub> device (hd0) /dev/sda > grub> device

So, it installed happily. Then wouldn't boot. No problem, I'll bring it up with pxe, then chroot and grub2-install. Um, nope. I edited the device map from hd0 and hd1 being the RAID to /dev/sda and /dev/sdb, then ran grup2-install. It now tells me can't identify the filesystem on hd0, and can't perform a safety check, and gives up. What am I missing? Google is not giving me any

I have been trying to multiboot centos 4.1 and the current solaris express build 15. I have two hard drive s, the first one ( hd0 ) devoted to CentOS 4.1 and windows xp (no problems). The second drive (hd1) for Solaris 10 only. I tried to boot solaris from CentOS grub and got the following error messages: Booting Solaris 10 root(hd1,0) Filesystem type unknown, partition type 0Xbf kernel

Dear All: I am having trouble trying to dual-boot VMware and Linux, and I tried everything I could come up with. The situation is that /dev/sda is fully used by VMware and /dev/sdb is used by Linux. VMware uses Syslinux, so I thought this would be simple... However, it is not. The bootable FAT partition is too smal to have kernels in it. As a fallback I tried to chain-load GRUB, but that did not

On 10/12/14 18:13, Jeff Boyce wrote: > Greetings - > > The short story is that got my new install completed with the > partitioning I wanted and using software raid, but after a reboot I > ended up with a grub prompt, and do not appear to have a grub.cfg file. > So here is a little history of how I got here, because I know in order > for anyone to help me they would

On Thu, Jan 5, 2017 at 4:04 AM, Nikolaos Milas <nmilas at noa.gr> wrote: > On 4/1/2017 7:37 ??, Gordon Messmer wrote: > > I don't see that on VMs that I manage. Some of the physical machines that >> I manage do have duplicates in the device.map. >> > > Thank you Gordon for your feedback! > > Can others please report the content of /boot/grub2/device.map

I have followed the procedure on the Centos page: http://wiki.centos.org/HowTos/CentOS5ConvertToRAID My setup is slightly different. I am using two partitions, / and /home. I have setup swap as a file, /home/swapfile. My hard drives are 500Gig sda and sdb. In modifying the instructions for initializing sdb I have: used /dev/md0 for / (sdb1) used /dev/md1 for /home (sdb2) In section 3.6 The

Hi, This must be a FAQ somewhere, although I am unable to find the answer quickly. We would like to have a bootable USB device offer the possibility to boot from the local disk. Unfortunately what happens when using 'chain.c32 hd1' is that GRUB works, but the GRUB configuration refers to it's disk as 'hd0', so booting an entry fails. One has to manually change 'root