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let suppose |
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sda and sdb is raid 1 md1 |
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and new sdc |
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remove sdb from raid |
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mdadm /dev/md1 -f /dev/sdb |
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mdadm /dev/md1 -r /dev/sdb |
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then create degraded raid 5 |
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don't forget md1 is still running |
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mdadm --create /dev/md2 --level 5 -n 3 /dev/sdb /dev/sdc missing |
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then copy all data from md1 to md2 |
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fix /etc/fstab and /boot/grub/grub.conf |
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destroy md1 |
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and add sda to md2 |
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2009/11/28 Dan Cowsill <danthehat@×××××.com> |
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> Hello list, |
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> |
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> Currently I have two terabyte hard disks in a RAID1 configuration |
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> using software RAID. What I'd like to do is add a third disk and |
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> arrive at the end with a RAID5 array. The problem is I have limited |
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> disk space and not enough room to back up all of the data on the array |
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> in its current form. What I'd like to know is if it is possible to |
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> use two disks to make a degraded RAID5 array, move the data onto it |
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> from one of the mirror disks, and then add the mirrored disk into the |
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> new array? |
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> |
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> Thanks, |
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> D |
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> |
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> |
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-- |
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Ларин Андрей |
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тел 89093090949 |
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