12 TB Disk In freebsd AMD 64 ?

Matthew Seaman m.seaman at infracaninophile.co.uk
Mon Mar 22 15:09:35 UTC 2010

Hash: SHA1

On 22/03/2010 14:03:53, Ian Lord wrote:
> I kinda understand freebsd is not well suited for that. I can read
> between the lines that we shouldn't go over 2TB. Is this information
> still exact or outdated ?

Outdated.  The 2TB limit comes from the old-style DOS/fdisk(8) mbr and
bsdlabel(8)[*].  Nowadays you can use gpart(8) instead and set up your
disks using GPT, which doesn't have the same limitations.  Given you're
going to have a separate RAID1 mirror for system disks, you'll be able
to get the machine up and running first, then build the filesystems for
the data partition without having to faff around at install time.

Even though you have a hardware RAID controller, it still might benefit
you to look at ZFS.  You can put a 'zpool disk' on top of a RAID6
created by your hardware, which will let you use all of the available
space easily, and give you various other advantages through the
integrated checksumming etc. built into ZFS.



[*] bsdlabel(8) has been modified to allow more than 8 partitions --
the bigdisk article is a bit behind the times there -- but the 32-bit
size limit still applies.

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