As the Size of your filesystem has reduced to an incredible low value,
Lot of Data (files & directories) might be lost.

For restoring the Files & Directories that have got stored in the lost+found
directory read the below mentioned lines.

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When FSCK is performed on a FILE System,

example : fsck -o f /dev/rdsk/c0t0d0s4
where /dev/dsk/c0t0d0s4 is mounted on /export

And if FSCK encounters any problem with the FileSystem SuperBlock Entries,
It prompts for a confirmation to rectify the problem, When Confirmation is provided,
FSCK tries to rectify the problem either correcting the Entries in the SuperBlock
or by moving the files[having the problem] into the /FileSystem/lost+found Directory.

example : ** Phase 3 - Check Connectivity
UNREF FILE I=788 OWNER=root MODE=100644
SIZE=19994 MTIME=Jan 18 10:49 2001
RECONNECT? y

In this case the file with INODE Number 788 is moved into the /export/lost+found
directory as

# ls /export/lost+found
#788


For Restoring the file in /export/lost+found into /export perform the below mentioned
tasks :

# ls /var/tmp/c0t0d0s4*
/var/tmp/c0t0d0s4_log

View this file to know the Correct File Name & Path for the corresponding file stored in the
/export/lost+found Directory with the INODE_Number as the FileName.
And then MOVE or COPY the file from /export/lost+found Directory into the Correct Path
mentioned in the LOG File.

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Try this it will work fine. Good Luck.