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HYPOTHETICAL DISK LAYOUT
Controller A Controller B
----------- ----------- -----------
| /dev/ra0a | / | /dev/ra1a | spare root | /dev/hp0a | root
----------- ----------- -----------
| /dev/ra0b | swap | /dev/ra1b | swap | |
----------- ----------- | /dev/hp0b | /x
| /dev/ra0d | | /dev/ra1d | /tmp | |
----------- ----------- -----------
| | | | | |
| /dev/ra0e | /usr | /dev/ra1e | /mnt | /dev/hp0g | /spare
| | | | | |
----------- ----------- | |
| /dev/ra0f | /usr1 | /dev/ra1f | /usr2 -----------
----------- ----------- Disk 3
| | | |
| /dev/ra0h | /local | /dev ra1h | /local2
| | | |
----------- -----------
Disk 1 Disk 2