Booting from mirror disk question

Question

Solaris 10 on Ultra 40M2
I got 2 disks mirrored with SVM.
OK, I can boot off either disk but I am not real sure that when I boot off the mirror, I am actually booting off that mirror. The reason I am saying this, when I look at output of df in either case, I always get the same disk, d1. Shouldn't I get d2 if it's the mirror boot?
How do I confirm that when I boot off the mirror, I get the mirror? Here is the menu.lst file:
title Solaris 10 5/08 s10x_u5wos_10 X86
kernel /platform/i86pc/multiboot
module /platform/i86pc/boot_archive
title Windows XP
rootnoverify (hd2,0)
map (hd0) (hd2)
map (hd2) (hd0)
chainloader +1
title Solaris 10 5/08 s10x_u5wos_10 X86 Mirror Disk
root (hd1,0,a)
kernel /platform/i86pc/multiboot
module /platform/i86pc/boot_archive
title Solaris failsafe
kernel /boot/multiboot kernel/unix -s
module /boot/x86.miniroot-safe
#: df -kFufs
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/md/dsk/d1       119098248 12882647 105024619    11%    /
/dev/dsk/c1t0d0s4    51634246   51217 51066687     1%    /part2
/dev/dsk/c1t0d0s3    51634246   51217 51066687     1%    /part1
/dev/dsk/c1t0d0s5    51634246   51217 51066687     1%    /part3
/dev/dsk/c1t0d0s7    10331209   10265 10217632     1%    /export/home

Answer 1

df shows the metadevice (logical) not the physical disk
prtconf -pv | grep bootpath
provides the device path, example /pci@c,600000/scsi@2,disk@0,0:a
eeprom | grep devalias
show your device alias, example disk1 /pci@c,600000/scsi@2,disk@0,0:a