Where are the files?

Right i've install the iscsi target and have it connect to my XP Pro machine and i have copied 6-7GB of data over to it which all seems fine.

But when i log into the Linux machine and do a df -h command it's showing no space has been used up?
[root@iscsi ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2             3.8G  1.6G  2.0G  45% /
/dev/mapper/VolGroup22-LogVol00
                       19G  173M   18G   1% /VLM
/dev/sda1              99M   15M   80M  16% /boot
tmpfs                 125M     0  125M   0% /dev/shm
[root@iscsi ~]#

my iscsi config
Target thisisatest.com.uk.charlies
        # Users, who can access this target. The same rules as for discovery
        # users apply here.
        # Leave them alone if you don't want to use authentication.
        #IncomingUser joe secret
        #OutgoingUser jim 12charpasswd
        # Logical Unit definition
        # You must define one logical unit at least.
        # Block devices, regular files, LVM, and RAID can be offered
        # to the initiators as a block device.
        Lun 0 Path=/dev/mapper/VolGroup22-LogVol00,Type=fileio
        # Alias name for this target
        # Alias Test
        # various iSCSI parameters
        # (not all are used right now, see also iSCSI spec for details)
        #MaxConnections         1
        #InitialR2T             Yes
        #ImmediateData          No
        #MaxRecvDataSegmentLength 8192
        #MaxXmitDataSegmentLength 8192
        #MaxBurstLength         262144
        #FirstBurstLength       65536
        #DefaultTime2Wait       2
        #DefaultTime2Retain     20
        #MaxOutstandingR2T      8
        #DataPDUInOrder         Yes
        #DataSequenceInOrder    Yes
        #ErrorRecoveryLevel     0
        #HeaderDigest           CRC32C,None
        #DataDigest             CRC32C,None
        # various target parameters
        #Wthreads               8


So where are my files on the linux system.  Sorry to ask but i'm a complete newbie to all this stuff.