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	Easy newbie question: which filesystem can I use that allows me to have 
a 6TB partition (centos 4.4 on a 64bit dual xeon box)? I have this 6TB 
hardware raid5 beast I want to mount as a single partition. So, I tried 
to do mkfs.ext3 -b 4096 /dev/sda1 but the array is being shown to have 
only 133GB:

[root@case ~]# df -h
[...]
/dev/sda1             141G   92M  133G   1% /backup

dmesg knows how bit it is though:

sda : very big device. try to use READ CAPACITY(16).
SCSI device sda: 13183395840 512-byte hdwr sectors (6749899 MB)
SCSI device sda: drive cache: write back, no read (daft)
  sda: sda1
sda : very big device. try to use READ CAPACITY(16).
SCSI device sda: 13183395840 512-byte hdwr sectors (6749899 MB)
SCSI device sda: drive cache: write back, no read (daft)
  sda: sda1
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
SELinux: initialized (dev sda1, type ext3), uses xattr
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
SELinux: initialized (dev sda1, type ext3), uses xattr