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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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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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Neil Bothwick |
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Always proofread carefully to see if you any words out. |
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