 | | | Kernel file system support under RHEL | Kernel file system support under RHEL 2005-06-20 - By Arjan van de Ven
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On Mon, 2005-06-20 at 13:45 +0100, Chiu, PCM (Peter) wrote:
> I sent the following post, but suspect it didn't reach the list, so
> try it again.
>
>
> We have just recently acquired a few 24 x 400GB SATA servers with 3Com
> 9500S-12 controllers. The 24 drives are configured into 2 x Raid 5
> sets with the 9500S controllers, so each RAID set should have a
> capacity of 4TB.
>
> Under RHEL AS 3 update 3, the RAIDs are recognised as sda and sdb
> devices with 2TB capacity each, as opposed to 4.
>
> If I then mount RHEL AS 4, "fdisk -l" shows sda and sdb being 4TB
> each, but mke2fs -j /dev/sda or sdb will only make a 1.8GB file system
> on each device. (1.8GB is not a typing mistake.)
one of the issues with fdisk and co is that the "traditional" msdos
style partition support is limited to 2Tb (due to on disk layout). You
need to use the gpt partitioning format if you want to go over 2Tb.
"fdisk" doesn't supported this; parted does.
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