I have an old RAID 1 volume from about 7 years ago. A while ago I replaced one out of two drives with a drive with 4x the size and then recently I replaced the second two out of two disks. Both of the two new disks are 4x the size of the original raid-1 volume.
I read on SuperUser/Server Fault/Stack Exchange question that you can increase the size of the RAID 1 volume but the process is different for every make/model (difference for software/hardware and different for which specific software/hardware you have).
For Intel motherboard/hardware raid controller and a RAID 1 volume and two new hard drives with more storage, how do you increase the size of the RAID 1 volume?
Best Answer
In my case I used Intel's GUI application that runs on Microsoft Windows to increase the harddrive size. Most of the Intel motherboard/hardware raid controllers use the same Intel GUI application. The older version is called Intel "Matrix Storage Console" and the newer version are called Intel "Rapid Storage".
Open the GUI application and then make sure it is in "Advanced Mode":
View --> Advanced Mode
.In the advanced view you will see a tree-like display of all the hardware managed by the sata/raid controller. You need to locate your raid-volume in that tree-like display. In my case my raid volume was located at:
Intel Matrix Storage Manager --> Intel ... SATA RAID Controller --> Arrays --> Array_0000 --> Volumes --> Volume0
*1Then you need to use the GUI to increase the size of the raid-volume by following this process:
right-click the raid-volume --> select Modify-Volume --> Next --> Next --> check the "Volume Capacity Expansion" checkbox --> select the "Utilize 100% of available array space" radio button
After you confirm this GUI dialog, the raid controller will get to work.
NOTE:
The last step is:
Start Menu --> Computer Management --> Disk Management
(linux has many command-line/GUI. one isgparted
.)Bonus, extend the partition:
Disk Management
to extend the partitionright-click the partition --> click "Extend" --> confirm
My Computer --> right-click the drive "Properties"
there should be more space (in my example I now have 1TB)*1 Depending on how you created your raid-1 volume, the name/location will vary (finding your would probably be a new question). But if you only have one volume then finding it shouldn't be too hard.