Probably not many know that bootinfo comand is deprecated and it has been replaced by getconf. Now, don't get scared because bootinfo is still there for backwards compatibility and I am pretty sure it will still be there for a long time. The best part now is that we have a better alternative.
Please find below some getconf examples and if you need more, please use the magic words man getconf
What is the device from which the system was last booted from:
$ getconf BOOT_DEVICE hdisk0
What is the size of a particular disk:
$ getconf DISK_SIZE /dev/hdisk0 32768
What is the partition size used on a disk:
$ getconf DISK_PARTITION /dev/hdisk0 64
How to check if the machine is capable of running a 64-bit or 23-bit kernel:
$ getconf HARDWARE_BITMODE 64
How to verify if the system is currently running a 64-bit or 32-bit kernel:
$ getconf KERNEL_BITMODE 64
How to see the real memory size:
$ getconf REAL_MEMORY 1048576
