Error storing directory block information Memory Allocation failed

Unfortunately my large disk partition was corrupted (maybe because it was 100% full a few months, while quite a few processes wrote more 0 byte files on it). The mount fails with this error message:

root@server:/mnt$ mount /dev/md127 md/

mount: wrong fs type, bad option, bad superblock on /dev/md127, missing codepage or helper program

or other error In some cases useful info is found in

syslog - try dmesg | tail 

or so.
Then I found this link suggesting running

e2fsck -y -f -v -C 0 /dev/sda3

But unfortunately it fails with the following error message:

Error storing directory block information (inode=14109880, block=0, num=471166008): Memory allocation failed

Solution

debugfs -w -R "clri <14109880>" /dev/vg/root

From: http://www.spinics.net/lists/linux-ext4/msg42703.html Then rerun the e2fsck from above.   UPDATE I wrote this script to do the clearing – recheck -cycle automatically, since otherwise manually it might take weeks to complete:

#!/bin/bash

#TODO run first mkfs.ext3 -n $DEVICE to find out some backup -superblock
SUPERBLOCK=11239424
DEVICE=/dev/md127

function clear_inode() {
 local INODE=$1
 debugfs -w -R "clri <${INODE}>" $DEVICE
}
function check_inode() {
 local INODE=`e2fsck -b $SUPERBLOCK -y -f -v -C 0 $DEVICE|grep "Error storing directory block information" |cut -d ' ' -f6 |cut -d '=' -f2 |cut -d ',' -f1`
 #Case1: parse INODE from "Error storing directory block information (inode=14109880, block=0, num=471166008): Memory allocation failed"
 echo "$INODE"
}

function is_int() {
 if $(test -z $@) ; then
 return 1 #false
 fi
 return $(test "$@" -eq "$@" > /dev/null 2>&1);
}


INODE=$(check_inode)
echo "Cheking $INODE"
OLDINODE=$INODE
#check whether INODE is integer
while $(is_int "${INODE}") ; do
 echo "Clearing inode $INODE"
 clear_inode $INODE
 INODE=$(check_inode)
 echo "New inode $INODE"
 if [ "$INODE" -eq "$OLDINODE" ]; then
 echo "ERROR Looping the same inode"
 exit 2
 fi
 OLDINODE=$INODE
done

Update