similar to: Software RAID on CentOS 5 ... ideas ...

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 -

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 have 4096 byte > physical sectors, but it's worth confirming you don't have such a > drive because the current partition

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,

I had this little shell script. Use at your own risk... Jerry --------- # To load a blank drive with the old partition information use the command: # sfdisk /dev/hda < /etc/silentm/raidinfo.partitions.hda # The following command will setup the passed argument to boot in case the main disk is faulty # $1 is either /dev/hdb or /dev/sdb grub_setup_scsi() { grub << EOF find

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

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

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 have 4096 byte physical sectors, but it's worth confirming you don't have such a drive because the current partition scheme you've posted would be sub-optimal if it does have 4096

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 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

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>

Hi, The CentOS wiki sports a page about setting up software RAID1 on CentOS 5.x. There's a section about making both members of the RAID1 bootable by setting up GRUB on both disks. Now I wonder how this should be done on CentOS 6.x and 7. I have two sandbox machines in my office, one running a minimal CentOS 6.6, the other one with a CentOS 7 installation. Correct me if I'm wrong,

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

I never thought I'd say this, but I think it's easier to do this with GRUB 2. Anyway I did an installation to raid1's in CentOS 6's installer, which still uses GRUB legacy. I tested removing each of the two devices and it still boots. These are the commands in its log: : Running... ['/sbin/grub-install', '--just-copy'] : Running... ['/sbin/grub',

So I'm trying to RAID-1 this system which has two identical disks installed in it, and it isn't working for some reason. I started by doing a CentOS-4 install on /dev/sda1 as root, and with /dev/sda2 as my swap. I finish the install, yum update, and then I want to make the mirrors. I copy the partition table from one disk to the other: # sfdisk -d /dev/sda | sfdisk /dev/sdb I create

Hey I had the same problem some time ago. But here is a solution how to do that, but it''s a bit tricky! REQUIREMENT: THE SYSTEM PARTITION ON THE IMAGE MUST BE THE FIRST PARTITION, AFTER THAT THERE MUST BE ONLY SWAP PARTITIONS!!!! This setup would work, there should be no risk at all: Partition 1 on the image: / Partition 2 on the image: swap space This setup WONT''T WORK, YOU

I have attempted to address all comments: http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 Give me your best shot! :-D Phil

I'd like to use chain.c32 to allow the computer boot from HARDDISK if needed. If I use isolinux and boot from CD, the following works OK: chain.c32 hd0 But if I boot from USB Flash Key, it sometimes work and sometimes it doesn't and I have to use chain.c32 hd1 (it seems BIOS assigns hd0 to the flash key sometimes, so the real harddisk is hd1 in that case). Is there any way to tell

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