Re: [gentoo-user] Migrating RAID: Degraded RAID5 from RAID1?
On Sat, Nov 28, 2009 at 2:30 AM, andrey larin ubergit...@yandex.ru wrote: let suppose sda and sdb is raid 1 md1 and new sdc remove sdb from raid mdadm /dev/md1 -f /dev/sdb mdadm /dev/md1 -r /dev/sdb then create degraded raid 5 don't forget md1 is still running mdadm --create /dev/md2 --level 5 -n 3 /dev/sdb /dev/sdc missing then copy all data from md1 to md2 fix /etc/fstab and /boot/grub/grub.conf destroy md1 and add sda to md2 Excellent. All I need to know is that there is indeed a mechanism for doing this and that I am not crazy. Man pages should fill in the rest. Thanks for your help, Andrey
Re: [gentoo-user] Migrating RAID: Degraded RAID5 from RAID1?
On Freitag 27 November 2009, Dan Cowsill wrote: Hello list, Currently I have two terabyte hard disks in a RAID1 configuration using software RAID. What I'd like to do is add a third disk and arrive at the end with a RAID5 array. The problem is I have limited disk space and not enough room to back up all of the data on the array in its current form. What I'd like to know is if it is possible to use two disks to make a degraded RAID5 array, move the data onto it from one of the mirror disks, and then add the mirrored disk into the new array? Thanks, D easy, have a look at 'grow'. Oh and use google. There are a lot of examples how to go from raid1 to raid5. It is easy. No disk pulling is needed.
[gentoo-user] Migrating RAID: Degraded RAID5 from RAID1?
Hello list, Currently I have two terabyte hard disks in a RAID1 configuration using software RAID. What I'd like to do is add a third disk and arrive at the end with a RAID5 array. The problem is I have limited disk space and not enough room to back up all of the data on the array in its current form. What I'd like to know is if it is possible to use two disks to make a degraded RAID5 array, move the data onto it from one of the mirror disks, and then add the mirrored disk into the new array? Thanks, D
Re: [gentoo-user] Migrating RAID: Degraded RAID5 from RAID1?
let suppose sda and sdb is raid 1 md1 and new sdc remove sdb from raid mdadm /dev/md1 -f /dev/sdb mdadm /dev/md1 -r /dev/sdb then create degraded raid 5 don't forget md1 is still running mdadm --create /dev/md2 --level 5 -n 3 /dev/sdb /dev/sdc missing then copy all data from md1 to md2 fix /etc/fstab and /boot/grub/grub.conf destroy md1 and add sda to md2 2009/11/28 Dan Cowsill danthe...@gmail.com Hello list, Currently I have two terabyte hard disks in a RAID1 configuration using software RAID. What I'd like to do is add a third disk and arrive at the end with a RAID5 array. The problem is I have limited disk space and not enough room to back up all of the data on the array in its current form. What I'd like to know is if it is possible to use two disks to make a degraded RAID5 array, move the data onto it from one of the mirror disks, and then add the mirrored disk into the new array? Thanks, D -- Ларин Андрей тел 89093090949
