couldn't boot from linux grub

when i use my archlinux grub to boot solaris10 update 1 ,it complains 

[b]Booting 'Solaris 10 1/06  X86'
root (hd0,2,a)
Error 22: No Such partition
Press any key to continue[/b]

when i use tab key after " root (hd0,2,",it just give a parenthesis--"(hd0,2,)".
it seems not to surport solaris partition.
now i couldn't get into solaris.
how should i do ?
thanks!
 
 
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