Upgrade Mirrored hard drive

why there is no one replied Andy fo such a long time, ok this is an old topic, but it seems that many people encountered the same problem, hope I can do something helpful.
Andy did not tell us whether the 'mirror' is dynamic Mirror Volume or haredware raid. If it is dynamic disk, you cannot resize the dynamic volume after you remirror to another larger disk, even by third party product, the only way is to copy original dynamic volume to the larger disk, then mirror the two large disks. see http://www.partition-tool.com/reso [...] c-disk.htm

If the mirror is hardware RAID1, it is easy to solve, build another raid by the large disks, and then copy original disk to this raid, at last expand the partitions. check http://www.partition-tool.com/reso [...] tition.htm