 | | | Kernel file system support under RHEL | Kernel file system support under RHEL 2005-06-20 - By Jussi Silvennoinen
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> 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.)
>
> I tried to check the kernel with make menuconfig, but I cannot find a
> suitable option to specify a larger file system.
>
> Is this an oversight or a bug?
> The feature page on RedHat clearly states the support of 8TB under RHEL
> AS 4. Did try to check RedHat knowledge database and bugzilla but cannot
> locate any reference.
>
> By the way, the processors are dual AMD 248 with 4GB RAM, and I did
> select the x86-64 versions of the RHEL.
Yes, 8TB under ***RHEL4***, RHEL3 != RHEL4.
RHEL3 officially supports up to 1TB before U5, 2TB after U5.
--
Jussi
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