How to add a second disk to the zfs root pool

hard drivesolariszfs

I am trying to add a new disk to my zfs root pool. Here is my current config:

# zpool status
  pool: rpool
 state: ONLINE
 scrub: none requested
config:

    NAME        STATE     READ WRITE CKSUM
    rpool       ONLINE       0     0     0
      c0d0s0    ONLINE       0     0     0

errors: No known data errors
bash-3.00# df -h
Filesystem            Size  Used Avail Use% Mounted on
rpool/ROOT/s10x_u7wos_08
                      311G   18G  293G   6% /
swap                   14G  384K   14G   1% /etc/svc/volatile
/usr/lib/libc/libc_hwcap1.so.1
                      311G   18G  293G   6% /lib/libc.so.1
swap                   14G   52K   14G   1% /tmp
swap                   14G   40K   14G   1% /var/run
rpool/export          293G   19K  293G   1% /export
rpool/export/home     430G  138G  293G  32% /export/home
rpool                 293G   36K  293G   1% /rpool


# format
Searching for disks...done


AVAILABLE DISK SELECTIONS:
       0. c0d0 <DEFAULT cyl 60797 alt 2 hd 255 sec 63>
          /pci@0,0/pci-ide@1f,2/ide@0/cmdk@0,0
       1. c2d0 <Hitachi-   JK1181YAHL0YK-0001-16777216.>
          /pci@0,0/pci-ide@1f,5/ide@1/cmdk@0,0

Disk 1 above is the new disk I need to attach to expand my root pool (give /export/home some extra space).

If I try to attach my new disk to the pool 

# zpool attach -f rpool c0d0s0 c2d0s0
cannot attach c2d0s0 to c0d0s0: new device must be a single disk

# uname -a
SunOS dsol1 5.10 Generic_139556-08 i86pc i386 i86pc Solaris

Any ideas?

EDIT: 

# zpool add rpool c2d0

cannot add to 'rpool': root pool can not have multiple vdevs or separate logs

Best Answer

You cannot add devices to the root pool (outside mirroring it but this isn't going to help in your case).

What you can do is creating a new zpool with your second disk and relocate /export on it.

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