Got error while setup North America data in Nominatim

hi everyone

                i got the follwing error while i setuping North America data in Nominatim in ubuntu.

when i check for Disk Space it shows

Available disk space on my system

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda1 ext3 92G 58G 30G 67% /

udev devtmpfs 3.9G 4.0K 3.9G 1% /dev

tmpfs tmpfs 1.6G 1.1M 1.6G 1% /run

none tmpfs 5.0M 0 5.0M 0% /run/lock

none tmpfs 3.9G 312K 3.9G 1% /run/shm

/dev/sda3 ext3 353G 22G 313G 7% /home

if its a space problem means 30GB more data to process.

then i check total data occupied by nominatim in psql it show 49 GB.

Anybody help me get out of this issue.