by Example ZFS configurations for a Sun x4500 with 24TB of raw disk. Two disks are held for OS, leaving 46 available disks for ZFS.
One 45 disk raidz2 zvol across 6 controllers.
Most disk, but very slow performance. ~21TB space.
zpool create -f thumper raidz2 c0t1d0 c1t1d0 c4t1d0 c5t1d0 c6t1d0 c7t1d0
c0t2d0 c1t2d0 c4t2d0 c5t2d0 c6t2d0 c7t2d0 c0t3d0 c1t3d0 c4t3d0 c5t3d0
c6t3d0 c7t3d0 c0t4d0 c1t4d0 c4t4d0 c5t4d0 c6t4d0 c7t4d0 c0t5d0 c1t5d0
c4t5d0 c5t5d0 c6t5d0 c7t5d0 c0t6d0 c1t6d0 c4t6d0 c5t6d0 c6t6d0 c7t6d0
c0t7d0 c1t7d0 c4t7d0 c5t7d0 c6t7d0 c7t7d0 c0t0d0 c1t0d0 c4t0d0
zpool add -f thumper spare c7t0d0
5 Raidz2 zvols striped across 6 controllers. ILO/BIOS v1.0.3
Good performance, good amount of disk. ~16TB
zpool create -f thumper raidz2 c0t1d0 c1t1d0 c4t1d0 c5t1d0 c6t1d0 c7t1d0 c0t2d0 c1t2d0 c4t2d0
zpool add -f thumper raidz2 c5t2d0 c6t2d0 c7t2d0 c0t3d0 c1t3d0 c4t3d0 c5t3d0 c6t3d0 c7t3d0
zpool add -f thumper raidz2 c0t4d0 c1t4d0 c4t4d0 c5t4d0 c6t4d0 c7t4d0 c0t5d0 c1t5d0 c4t5d0
zpool add -f thumper raidz2 c5t5d0 c6t5d0 c7t5d0 c0t6d0 c1t6d0 c4t6d0 c5t6d0 c6t6d0 c7t6d0
zpool add -f thumper raidz2 c0t7d0 c1t7d0 c4t7d0 c5t7d0 c6t7d0 c7t7d0 c0t0d0 c1t0d0 c4t0d0
zpool add -f thumper spare c7t0d0
6 RAIDz2 zvols across 6 controllers.
Better performance than previous, less disk. ~14TB
zpool create -f thumper raidz2 c0t1d0 c1t1d0 c4t1d0 c5t1d0 c6t1d0 c7t1d0 c7t7d0
zpool add -f thumper raidz2 c0t2d0 c1t2d0 c4t2d0 c5t2d0 c6t2d0 c7t2d0 c6t7d0
zpool add -f thumper raidz2 c0t3d0 c1t3d0 c4t3d0 c5t3d0 c6t3d0 c7t3d0 c5t7d0
zpool add -f thumper raidz2 c0t4d0 c1t4d0 c4t4d0 c5t4d0 c6t4d0 c7t4d0 c4t7d0
zpool add -f thumper raidz2 c0t5d0 c1t5d0 c4t5d0 c5t5d0 c6t5d0 c7t5d0 c1t7d0
zpool add -f thumper raidz2 c0t6d0 c1t6d0 c4t6d0 c5t6d0 c6t6d0 c7t6d0 c0t7d0
zpool add -f thumper spare c7t0d0 c0t0d0 c1t0d0 c4t0d0
22 mirror zvols across 6 controllers.
Best performance, least amount of disk. ~10TB
zpool create -f thumper
mirror c0t1d0 c1t1d0
mirror c4t1d0 c5t1d0
mirror c6t1d0 c7t1d0
mirror c0t2d0 c1t2d0
mirror c4t2d0 c5t2d0
mirror c6t2d0 c7t2d0
mirror c0t3d0 c1t3d0
mirror c4t3d0 c5t3d0
mirror c6t3d0 c7t3d0
mirror c0t4d0 c1t4d0
mirror c4t4d0 c5t4d0
mirror c6t4d0 c7t4d0
mirror c0t5d0 c1t5d0
mirror c4t5d0 c5t5d0
mirror c6t5d0 c7t5d0
mirror c0t6d0 c1t6d0
mirror c4t6d0 c5t6d0
mirror c6t6d0 c7t6d0
mirror c0t7d0 c1t7d0
mirror c4t7d0 c5t7d0
mirror c6t7d0 c7t7d0
mirror c0t0d0 c1t0d0
zpool add -f thumper spare c7t0d0 c4t0d0