Are you booting your server in EFI mode already? Or the Legacy BIOS mode? Also, what partition table is used on your installation? You can check this with:
linux## parted /dev/sdX (parted) print If the output has "Patition Table: msdos" yes are stuck with the 2TB limit per partition. And you will be able to access only ~4TB at most if using MBR (msdos) partition table. RedHat introduced EFI boot starting from RHEL 6.0 on. Since Scientific Linux is based on RHEL, you will not have EFI boot support while running Scientific Linux 5.4 You can certainly create a GPT partition on the new drives and use them as data drives. You just cannot use the resultant 6TB drive as a boot drive. Praveen From: linux-poweredge-bounces-Lists On Behalf Of Diederick Stoffers Sent: Friday, November 12, 2010 10:27 AM To: [email protected]; linux-poweredge-Lists Subject: running 3TB disks in RAID5 on SL 5.4 Hi all, My lab uses a Dell Poweredge R905 server running Scientific Linux 5.4. It has three 1TB disks that are combined in a RAID5 configuration to create one 2TB partition. I would like to replace these with three 3TB disks to create one 6TB partition in RAID5. I read online there might be issues with running 3TB disks, some people have encountered an upper limit of 2.1TB for a single partition due to addressing issues. However, this should not be a problem when running Extensible Firmware Interface (EFI). Can anyone confirm that this will work on my system with the current OS? Cheers, Diederick
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