Trouble with Lacie 1TB external hard disk

Recently got a Lacie 1TB external hard disk. Need to get as close to 1TB actual capacity as I can.
Used cfdisk to create a single Linux partition, and thought I tried to "maximize" the size.
Used mkfs -t ext3 /dev/sdb1 to create the file system.
Tried to mount the disk. The first go around apparently failed (dmesg said there was no journal).
I repeated all of the above and the second time it mounted, but "df -h" reports:
/dev/sdb1 925G 200M 878G 1% /mnt/external_1
What the hell happened?
Can someone please advise on how to fix this, and actually maximize the real available space? Please include the exact utilities and flags you would recommend.
thanks much.

lucke,
i know disks always have less capacity than the nominal size. but a 1TB disk should have more than 900 MB available. possibly as much as 980 MB. that would be commensurate with my past experience using other external drives. over 200 GB used off the bat is ridiculous, and i've never seen anything like that before.
as a revised question to people out there, which fs would you recommend to get the most out of this disk. it's going to have 900+ GB of files, each almost exactly 170 MB, and will be processed via the USB2 interface.

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Trouble with Lacie 1TB external hard disk

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