super  |     inode blocks              |      indirect blocks
block

SB     |     IB IB IB ...  IB  IB      |      DB DB DB ... DB
0            1                iSize        iSize+1      size-1

Block size = 512 bytes

SuperBlock       contains file system params
- size           # of blocks in the file system
- iSize          # of inode blocks
- freeList       # of 1st free block in the indirect area


Inode            contains meta-info for a file
- flags          0=not used; 1=used
- name		 file name as iNumber
- fileSize       file data size in bytes
- pointer[13]    array of ponters to the file data/indirect blocks


InodeBlock       stores 8 InodeBlocks
- node[8]


IndirectBlock
- pointer[128]   number of data/indirect file blocks


Disk
- readCount      statistics of f.s. operations
- writeCount
- fileName       name of file with our file system on disk (DISK)
- disk           used for in-memory file access


FileDescriptor	 represents an opened file in the File table
- inode		 inode that represents the (opened) file
- inumber	 file "name" (iNumber)
- seekPtr	 position of the file seek pointer


FileTable	 keeps track on all opened files
- fdArray[21]	 array of file discriptors


Block0  Block1    Block2 .... BlockN
0..511  512..1023 1024..
           ^
	  600 <- blockNo

Physical
file block           blockTMP	     buffer 
********             ********        ********  <- bufferPtr  
*      *             *      *        *      *
*      *             *      *        *      *
*      *             *      *        *      *
########  <-offset-> *      *        ********
########             *      *
########             *      *
*      *             *      *
*      *             *      * 
********     	     ********