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On Friday, September 12, 2014 09:17:41 PM Joseph wrote: |
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> On 09/12/14 23:52, Neil Bothwick wrote: |
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> >On Fri, 12 Sep 2014 15:53:19 -0600, Joseph wrote: |
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> >> I have two identical HD in a box and want to duplicate sda to sdb |
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> >> I want sdb to be bootable just in case something happens to sda so I |
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> >> can swap the drives and boot. |
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> >> |
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> >> Do I boot from USB and run: |
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> >> dd if=/dev/sda of=/dev/sdb bs=512 count=1 |
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> > |
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> >If you remove the cunt argument as already mentioned, this will copy the |
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> >whole drive, but it will be incredibly slow unless you add bs=4k. It also |
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> >only copies it once, as soon as you start using sda, sdb will be out of |
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> >date. Set up a RAID-1 array with the two drives, then install GRUB to the |
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> >boot sector of each drive, using grub2-install and you will always be |
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> >able to boot in the event of a failure of either drive. |
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> |
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> I'll be interested in setting up RAID-1. Is it hard? |
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> I've never done it and I know there is plenty of information on line about |
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> RAID-1 |
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> |
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> I'm not going to grub2 anytime soon. This machine has BIOS and the HD has |
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> MBR partition. With recent problem I had with my other older box (that has |
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> BIOS) and grub2 I'm not going to play with it. |
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> |
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> Is it hard to set it UP RAID-1 |
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Grub2 can work with older style BIOS and MBR partitioning. |
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I believe the issues you were facing was caused by the partitioning you were |
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trying. |
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But even with legacy grub, the steps are, mostly, the same. |
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Check the Gentoo documentation for RAID+LVM installs and if you only want to |
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use RAID, ignore the LVM steps. |
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-- |
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Joost |
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