gmirror, gpart and MBR vs GPT in the Handbook
Peter Giessel
pgiessel at mac.com
Tue Dec 3 03:23:41 UTC 2013
On 2013, Dec 2, at 8:46, Polytropon <freebsd at edvax.de> wrote:
> I think you're correct regarding this finding: The data type 2^32
> (because of 32 bit) defines the 2 TB limit. It applies both on
> MBR (which stores 32 bit values) and UFS (which also stores 32
> bit values). However, I've never dealt with disks > 2 TB _and_
> UFS before, so I can't add specific individual findings. :-)
UFS works on drives bigger than 3 TB (ref /dev/da1p1 and /dev/mirror/gm0.journal):
[17:20][media: ~]> df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/da0s1a 247M 216M 11M 95% /
devfs 1.0k 1.0k 0B 100% /dev
/dev/da1p1 4T 3.6T 82G 98% /media
/dev/da0s1e 3.9G 5.1M 3.6G 0% /tmp
/dev/da0s1f 7.5G 5.8G 1.1G 84% /usr
/dev/da0s1d 3.9G 733M 2.9G 20% /var
/dev/mirror/gm0.journal 2.7T 1.8T 645G 74% /media/mythtv
[17:20][media: ~]> more /etc/fstab
# Device Mountpoint FStype Options Dump Pass#
/dev/da0s1b none swap sw 0 0
/dev/da0s1a / ufs rw 1 1
/dev/da1p1 /media ufs rw 2 2
/dev/da0s1e /tmp ufs rw 2 2
/dev/da0s1f /usr ufs rw 2 2
/dev/da0s1d /var ufs rw 2 2
/dev/mirror/gm0.journal /media/mythtv ufs rw,async 2 2
/dev/acd0 /cdrom cd9660 ro,noauto 0 0
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