I have been trying to multiboot centos 4.1 and the current solaris express build 15. I have two hard drive s, the first one ( hd0 ) devoted to CentOS 4.1 and windows xp (no problems). The second drive (hd1) for Solaris 10 only. I tried to boot solaris from CentOS grub and got the following error messages: Booting Solaris 10 root(hd1,0) Filesystem type unknown, partition type 0Xbf kernel /platform/i86pc/multiboot Error 17: can not mount selected partition press any key to continue.... I googled for error 17 and found out that "the partition exists but grub failed to recognize Solaris partition". That is odd because I had no problems triple booting windows,CentOs 4.1 and opensolaris build 16 and I don't get it, there is no partition difference between opensolaris 10 and solaris express. or is there ? Please somebody explain to me. Here is menu.lst for centos grub # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,5) # kernel /vmlinuz-version ro root=/dev/hda7 # initrd /initrd-version.img #boot=/dev/hda default=0 timeout=5 splashimage=(hd0,5)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.9-11.106.unsupported) root (hd0,5) kernel /vmlinuz-2.6.9-11.106.unsupported ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-11.106.unsupported.img title CentOS (2.6.9-11.EL) root (hd0,5) kernel /vmlinuz-2.6.9-11.EL ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-11.EL.img title Solaris 10 root (hd1,0) kernel /platform/i86pc/multiboot module /platform/i86pc/boot_archive makeactive chainloader +1 title Windows xp rootnoverify (hd0,0) chainloader +1 Note: This is my first post and I have learned a lot from your forum since I moved from mandrake 3 months ago. Thanks alot guys __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com