Hi, Sorry if this is slightly off-topic. I'm trying to figure out the HDD size limitation using GRUB2 MBR-only with three md raid sets: 6*2 TB Samsung HD204UI partitioned like so: Boot from sda MBR 15 GB / on raid1 pair ext4 15 GB swap on raid1 pair 32 MB unused fat16 per drive 1.9 TB /storage on raid 5 ext4 using all 6 drives The above has been working flawlessly on openSUSE 11.3, 11.4, 12.2, and initial install on 12.3. However, the first 12.3 kernel update replaced GRUB2 with a failing GRUB0.97(!). After much tinkering, I gdisk-converted the drives to a GRUB2 MBR+GPT with the 32 MB partition used for grub_bios. This survives the kernel update, so I think that I no longer have a problem. Either way, I would like to understand if I was wrong or if the kernel update is misbehaving. Surely, MBR supports 2TB drives with 512-byte sectors even though there is a larger md raid? Similarly, another identical server with 4*4TB Deskstar 7K4000 drives had exactly the same MBR-only problem (also avoided by converting to MBR+GPT), but in this case it might still work with 4kB sectors. (But I'm not sure if this advanced format drive is actually using 4kB addressing rather than 512B emulation.) Could somebody please shed some light on this? Thanks in advance Niclas -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
