I want to resize/move my /dev/md partitions. It's not clear to me how well gparted is aware of RAID1. gparted shows me the individual hard drives, and the partition layout of each mirrored drive. It does list a "raid" flag for each partition, but it's not clear to me if I tell it to resize an existing partition, it will mirror the operation on the other partition mirror.
I am considering the following approach:* Degrade all the partitions. Remove each partition on one of the drives, call it drive "B", from its array.
* Use gparted to rearrange the partitions on the other drive, drive "A".* Take the new partition layout on the "A" drive, and create the identical partition layout on the "B" drive.
* Use mdadm --add to add each partition on the "B" drive to its array.Or is there a better way to accomplish this? If not, I am not clear on a couple of details:
1) Does an ext3 partition running on top of a RAID-1 layer "look" any different on disk than a native ext3 partition? There's obviously a "raid" flag shown by parted, that comes from somewhere, but from parted's perspective, is a non-RAID-1 ext3 partition any different than a RAID-1 partition? In other words, if I tell parted to resize a RAID-1 ext3 partition, am I going to get mangled results?
2) Does creating a partition of "Linux raid autodetect" is all I need to do in order to succesfully add it to a degraded RAID-1 array, and have the array rebuilt and synced up?
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