Is their an easy way to realloate hard drive space on Solaris 10.
For example :
/c20td0 10G
/space 90 G
I would like to move some of the hard-drive space from "/space" and add it to "/c20td0". In Windows this can be easily done using Partition magic, anything similar for UNIX?
If both of those partitions are on one physical disk drive, yes. You just have to be careful that you don't remove/move space from another partition. You would use the format command, pick the appropriate disk drive, pick the partiton option, print option (to see what you have now on that disk), then see if the two partitions are next to each other (or are the only ones there). Slice 2 is always left alone and not used.
Note - you will mess up your system if you don't know what you are doing!!!
As you can see I have tons of space on "/space" I would like to allocate some of that space to /. Well, I'm not really a unix person, so I don't know what I am doing and I'm not sure that I want to risk messing up my system and it not booting up again. Maybe I'll just try to uninstall the apps I have on / and re-install them on /space
It seems that the only two partitions you have on c0t0d0 are / and /space.
You would have to double check this in the format utility. There are times when database software can use a partition (raw) and it won't show up on a df command output.
If these are the only two partitions being used, then you can do a couple of things:
1. Move complete directories from / to /space and link
Example: Move /opt/application to /space/application - do this while application is shut down (single user mode is best)
# cd /opt
# tar cf /space/application.tar ./application
# cd /space
# tar xpf /space/application.tar
Check that permissions, ownership, group is all correct
# cd /opt
# rm -r ./application
# ln -s /space/application ./application
Bring up application - have client check that it works - then delete /space/application.tar (if the move messes up the application, then you need this file to put it back into /opt)
2. Remove applications and reinstall in /space
3. Rebuild server with better partiton sizes
4. Look for the directories under / that are using up the space - could be applications, could be home directories, etc. Cut up /space partition into new partitons (again, I stress that other partitons need to be checked that they are not being used via the format command) such as /export/home (if that is where the home directories are located and are so huge that they should be moved)
Use format command to remove 10GB from /space and put it into an un-used partiton (let's say slice 4). newfs /dev/dsk/c0t0d0s4. Mount /dev/dsk/c0t0d0s4 to temporary directory (such as /mnt). Tar /export/home to file and extract to /mnt (see steps above). Rename /export/home to /export/oldhome. Unmount /mnt (umount /mnt), fsck /dev/dsk/c0t0d0s4, and mount as new /export/home (mount /dev/dsk/c0t0d0s4 /export/home). Once you have this working, then you have two more steps. Add new mount of /export/home to /etc/vfstab and remove /export/oldhome.
Look up these types of moves at sunsolve.sun.com or docs.sun.com to verify these steps.
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