growfs

[tad1214]

So I have googled a fair amount of times and read the man page and I am very confused.

I have a sparc Netra T1 AC 200, running FBSD 6-stable. It had dual 18GB disks in a gmirror raid 1, As can be imagined, ran out of space quickly. I purchased 2 73GB scsi drives. I removed 1 of the 18GBs, placed 73GB in, rebuild the mirror, removed the other 18GB, inserted 73GB, rebuilt mirror. Ok, so I have 2 73GB drives in there in a mirror (/dev/mirror/gm0) they are partitioned as such:

Otter# df -h
Filesystem          Size    Used   Avail Capacity  Mounted on
/dev/mirror/gm0a    501M     70M    392M    15%    /
devfs               1.0K    1.0K      0B   100%    /dev
/dev/mirror/gm0e    501M    356K    461M     0%    /tmp
/dev/mirror/gm0f     11G    9.8G    771M    93%    /usr
/dev/mirror/gm0d    1.9G    165M    1.6G     9%    /var

I want to grow only the, /usr partition to fill the rest of the disk. How do I go about doing. Every how to I see tells me to use fdisk, which isn't a program on sparc64. I have the original 18GB drives still so if all goes to hell, I can stick those back in and have all my data, not to mention it wouldn't be the end of the world if everything went away.

What do I need to do? I have console access to this box via Lights Out Management and another box with a serial port on the network (best part about this server hands down) so single user mode is easy to get to.

tl;dr: How do I use growfs to expand my /usr partition?

Thanks!!!!
-=Tom