From Tanenbaum's Modern Operating Systems, when trying to access a file in a ext2 file system in Linux, and then reaching the parent directory of the file,If the file is present, the system extracts the i-node number and uses it as an  index into the i-node table (on disk) to locate the corresponding i-node and bring it  into  memory. The  i-node  is  put  in  the i-node  table, a kernel  data  structure  that  holds all the i-nodes for currently open files and directories.Are there two different inode tables mentioned?Is the first inode table stored somewhere in the disk? Where is itstored? See the layout of a disk, a partition, and a file system below from the same book.Is it a mapping from the inode numbers to the inode addresses?Is the second inode table stored in the main memory?Is it a mapping from what to the inodes?
Are there two inode tables used in locating the inode of a file in ext2?
linux;filesystems;ext2