Am 17.02.2013 22:03, schrieb Heinz Diehl: > On 17.02.2013, Reindl Harald wrote: > >> if wouldn't do this and stick with dd / disk images and use gparted >> to resize partitions because if i clone machines i want to have >> all UUID's the same > > You can easily change/tailor your UUIDs with tools like tune2fs have fun change also the RAID UUID's everywhere and setup all identical because you have also internal UUIDs on the RAID-partitions [root@srv-rhsoft:~]$ cat /etc/mdadm.conf MAILADDR root AUTO +imsm +1.x -all ARRAY /dev/md0 level=raid1 num-devices=4 UUID=1d691642:baed26df:1d197496:4fb00ff8 ARRAY /dev/md1 level=raid10 num-devices=4 UUID=b7475879:c95d9a47:c5043c02:0c5ae720 ARRAY /dev/md2 level=raid10 num-devices=4 UUID=ea253255:cb915401:f32794ad:ce0fe396 oh yeah and the tun2fs-output of /dev/md0 is [root@srv-rhsoft:~]$ tune2fs -l /dev/md0 | grep UUID Filesystem UUID: 1de836e4-e97c-43ee-b65c-400b0c29d3aa again: have fun to reacreate this setup 1:1 after rsync to new drives - i bet it would not work at the end - well it may not interest you on your setups, mine are always two identical machines which are synced daily > The "dd" approach has a bunch of disadvantages, one of the biggest is > misalignment if your new drive is a SSD or advanced format HDD which misalignment? if i switch to SSD some years later as soon as 4x2 TB are at a normal price i will simply remove disk 1, insert a SSD, rebuild RAID and after the rbuild the same for the other 3 drives
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