Solaris

bash$ ls -l
total 9705512
-rw-r--r-- 1 root    root           321 Feb  1 11:13 checksum.md5
-rw-r--r-- 1 root    root    1621098496 Aug 17 21:03 sol-10-u4-ga-sparc-dvd-iso-a
-rw-r--r-- 1 kripton kripton 1480002316 Jan 31 06:53 sol-10-u4-ga-sparc-dvd-iso-a.zip
-rw-r--r-- 1 root    root    1864105984 Aug 17 21:13 sol-10-u4-ga-sparc-dvd-iso-b
-rw-r--r-- 1 kripton kripton 1478301573 Feb  1 04:02 sol-10-u4-ga-sparc-dvd-iso-b.zip

bash$ cat sol-10-u4-ga-sparc-dvd-iso-a sol-10-u4-ga-sparc-dvd-iso-b > sol-10-u4-ga-sparc-dvd.iso
bash$ ls -l sol-10-u4-ga-sparc-dvd.iso
-rw-r--r-- 1 kripton kripton 3485204480 Feb  1 10:10 sol-10-u4-ga-sparc-dvd.iso

bash$ cat checksum.md5 
d08f24ff68976ec4fc3584092c6259bb  sol-10-u4-ga-sparc-dvd.iso
9d6758cfd9f87d4056bbd7815dcd81a8  sol-10-u4-ga-sparc-dvd-iso-a.zip
cae841e82c63452b86e6aedd2b61be63  sol-10-u4-ga-sparc-dvd-iso-a
e9b34bac6a1065f3ec6755ec9d9050bd  sol-10-u4-ga-sparc-dvd-iso-b.zip
9eb4c6e51ff2a74a20bb6012536a45c3  sol-10-u4-ga-sparc-dvd-iso-b
bash$ md5sum -c checksum.md5 
sol-10-u4-ga-sparc-dvd.iso: OK
sol-10-u4-ga-sparc-dvd-iso-a.zip: OK
sol-10-u4-ga-sparc-dvd-iso-a: OK
sol-10-u4-ga-sparc-dvd-iso-b.zip: OK
sol-10-u4-ga-sparc-dvd-iso-b: OK

bash$ init 0

{} ok boot cdrom
Boot deice: /pci@0/pci@0/pci@1/pci@0/pci@1/pci@0/pci@0,2/storage@2/disk@0:f    File and args:
Can't read disk label.
Can't open disk label package
ERROR: boot-read fail

Can't open boot deice