Resize a RAID 1 volume on OS X Snow Leopard - how? (Note: software raid)
- by Emmel
I've scoured the Internet in search of an answer to this question, and as usual with OSX-related topics, I often don't find any deep-dive technical explanations sufficient enough to feel confident doing dangerous things.
Here is my question: I have a Mac Pro, running OS X 10.6.2. I have, as my main root/boot disk, a RAID 1 volume called "Mirror1". Mirror1 is comprised of two 1 TB disks. Mirror1, however, is fixed at 640 GB. That's because, I originally took a 640GB disk, bought a terabyte disk, mirrored it (using diskutil appleraid enable), when it synced I removed the 640GB and replaced it with a second 1 TB disk, and synced again. Voila! A single 640 GB replaced by two 1 TB disks in a mirror.. Actually, no. There's still something missing from the equation: Mirror1 needs to be expanded from 640GB to 1 TB to match the partition sizes on each of those disks.
How do I do this?
Perhaps the diskutil output will help:
-> diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI 209.7 MB disk0s1
2: Apple_RAID 999.9 GB disk0s2
3: Apple_Boot Boot OSX 134.2 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: EFI 209.7 MB disk1s1
2: Apple_RAID 999.9 GB disk1s2
3: Apple_Boot Boot OSX 134.2 MB disk1s3
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *640.1 GB disk2
1: EFI 209.7 MB disk2s1
2: Apple_HFS Mac Disk 2 536.7 GB disk2s2
3: Microsoft Basic Data BOOTCAMP 103.1 GB disk2s3
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Mirror1 *639.8 GB disk3
-> diskutil appleraid list
AppleRAID sets (1 found)
===============================================================================
Name: Macintosh HD
Unique ID: 1953F864-B474-4EB6-8E69-41834EBD0247
Type: Mirror
Status: Online
Size: 639.8 GB (639791038464 Bytes)
Rebuild: manual
Device Node: disk3
-------------------------------------------------------------------------------
# Device Node UUID Status
-------------------------------------------------------------------------------
0 disk1s2 25109BAE-5697-40EA-B612-0217851444F7 Online
1 disk0s2 11B83AB0-8148-4DB6-8761-DEF08C855F8D Online
===============================================================================
Thanks in advance.
