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dual boot RHEL5 and RHEL6

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linux-howto

http://www.unix.com – have a server pre-installed with RHEL5, with 12 SCSI disks being /dev/sda with RHEL5, and managed to put RHEL6 into /dev/sdc /dev/sda is the first bootable disk on the SCSI chain.. editing /etc/grub.conf would not allow me to boot RHEL6 , the entries seem to be right.. any advices, other than going into the SCSI bios and make /dev/sdc is the first bootable SCSI disk .. (HowTos)