> * Can you plesae redo this using "ls -ial" rather than "ls -l". That will > show extra useful info. details at the end > * Can you please see if there is anything in lost+found it is empty all the time. > * Please show /proc/yaffs before the rm and after the reboot details at the end > * Does the problem get cleared up by umount and mount? no. However, if I make an unclean reboot after dding the second file, the mount after the reboot makes it consistent again. Please find details at the end. I tried to find the cause of the decreasing of free space and I found the following: in yaffs_guts.c, around line 3010, in function yaffs_GarbageCollectBlock(): ... dev->nFreeChunks -= bi->softDeletions; ... the sum of these during the dd after reboot approx equals the 'lost' space. Strangely (for me), I found that this function is called with the same block number several times. I made lots of traces (does not fit into the serial terminal) and whenever I stop it I see that yaffs_GarbageCollectBlock() is called with many different block arguments (ranging from ~800 to ~2000) and every number is printed out 7 times. I used to trace this printout: "Collecting block %d, in use %d, shrink %d, wholeBlock %d, soft del %d" Hope it helps, thanks for the help anyway, Viktor Babrian details of commands performed: / $ ls -ial /mnt/ 1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 . 1 drwxr-xr-x 20 root root 0 Jan 1 00:00 .. 2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 lost+found / $ ls -ial /mnt/lost\+found/ 2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 . 1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 .. / $ df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock5 32768 18176 14592 55% / tmpfs 63956 0 63956 0% /var/tmp /dev/mtdblock13 2097152 3840 2093312 0% /mnt / $ dd if=/dev/zero of=/mnt/file bs=1M count=100 100+0 records in 100+0 records out / $ ls -ial /mnt/ 1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 . 1 drwxr-xr-x 20 root root 0 Jan 1 00:00 .. 261 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file 2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 lost+found / $ ls -ial /mnt/lost\+found/ 2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 . 1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 .. / $ df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock5 32768 18176 14592 55% / tmpfs 63956 0 63956 0% /var/tmp /dev/mtdblock13 2097152 106372 1990780 5% /mnt / $ / $ cat /proc/yaffs YAFFS built:May 19 2009 05:24:47 $Id: yaffs_fs.c,v 1.79 2009/03/17 01:12:00 wookey Exp $ $Id: yaffs_guts.c,v 1.82 2009/03/09 04:24:17 charles Exp $ Device 0 "MAP" startBlock......... 0 endBlock........... 16383 totalBytesPerChunk. 2048 nDataBytesPerChunk. 2048 chunkGroupBits..... 0 chunkGroupSize..... 1 nErasedBlocks...... 15564 nReservedBlocks.... 5 blocksInCheckpoint. 0 nTnodesCreated..... 3700 nFreeTnodes........ 39 nObjectsCreated.... 200 nFreeObjects....... 95 nFreeChunks........ 996159 nPageWrites........ 0 nPageReads......... 0 nBlockErasures..... 0 nGCCopies.......... 0 garbageCollections. 0 passiveGCs......... 0 nRetriedWrites..... 0 nShortOpCaches..... 10 nRetireBlocks...... 0 eccFixed........... 0 eccUnfixed......... 0 tagsEccFixed....... 0 tagsEccUnfixed..... 0 cacheHits.......... 0 nDeletedFiles...... 0 nUnlinkedFiles..... 0 nBackgroudDeletions 0 useNANDECC......... 1 isYaffs2........... 1 inbandTags......... 0 / $ rm /mnt/file **** power cycle / $ mount -t yaffs2 /dev/mtdblock13 /mnt/ / $ cat /proc/yaffs YAFFS built:May 19 2009 05:24:47 $Id: yaffs_fs.c,v 1.79 2009/03/17 01:12:00 wookey Exp $ $Id: yaffs_guts.c,v 1.82 2009/03/09 04:24:17 charles Exp $ Device 0 "MAP" startBlock......... 0 endBlock........... 16383 totalBytesPerChunk. 2048 nDataBytesPerChunk. 2048 chunkGroupBits..... 0 chunkGroupSize..... 1 nErasedBlocks...... 15736 nReservedBlocks.... 5 blocksInCheckpoint. 0 nTnodesCreated..... 2900 nFreeTnodes........ 2899 nObjectsCreated.... 200 nFreeObjects....... 95 nFreeChunks........ 1047359 nPageWrites........ 0 nPageReads......... 0 nBlockErasures..... 0 nGCCopies.......... 0 garbageCollections. 0 passiveGCs......... 0 nRetriedWrites..... 0 nShortOpCaches..... 10 nRetireBlocks...... 0 eccFixed........... 0 eccUnfixed......... 0 tagsEccFixed....... 0 tagsEccUnfixed..... 0 cacheHits.......... 0 nDeletedFiles...... 1 nUnlinkedFiles..... 1 nBackgroudDeletions 0 useNANDECC......... 1 isYaffs2........... 1 inbandTags......... 0 / $ / $ ls -ial /mnt/ 1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 . 1 drwxr-xr-x 20 root root 0 Jan 1 00:00 .. 2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 lost+found / $ ls -ial /mnt/lost\+found/ 2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 . 1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .. / $ df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock5 32768 18176 14592 55% / tmpfs 63956 0 63956 0% /var/tmp /dev/mtdblock13 2097152 3840 2093312 0% /mnt / $ / $ dd if=/dev/zero of=/mnt/file bs=1M count=100 100+0 records in 100+0 records out / $ ls -ial /mnt/lost\+found/ 2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 . 1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .. / $ ls -ial /mnt/ 1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 . 1 drwxr-xr-x 20 root root 0 Jan 1 00:00 .. 262 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file 2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 lost+found / $ df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock5 32768 18176 14592 55% / tmpfs 63956 0 63956 0% /var/tmp /dev/mtdblock13 2097152 588664 1508488 28% /mnt / $ / $ cat /proc/yaffs YAFFS built:May 19 2009 05:24:47 $Id: yaffs_fs.c,v 1.79 2009/03/17 01:12:00 wookey Exp $ $Id: yaffs_guts.c,v 1.82 2009/03/09 04:24:17 charles Exp $ Device 0 "MAP" startBlock......... 0 endBlock........... 16383 totalBytesPerChunk. 2048 nDataBytesPerChunk. 2048 chunkGroupBits..... 0 chunkGroupSize..... 1 nErasedBlocks...... 15564 nReservedBlocks.... 5 blocksInCheckpoint. 0 nTnodesCreated..... 3700 nFreeTnodes........ 38 nObjectsCreated.... 200 nFreeObjects....... 94 nFreeChunks........ 755012 nPageWrites........ 0 nPageReads......... 0 nBlockErasures..... 628 nGCCopies.......... 0 garbageCollections. 4396 passiveGCs......... 4396 nRetriedWrites..... 0 nShortOpCaches..... 10 nRetireBlocks...... 0 eccFixed........... 0 eccUnfixed......... 0 tagsEccFixed....... 0 tagsEccUnfixed..... 0 cacheHits.......... 0 nDeletedFiles...... 1 nUnlinkedFiles..... 1 nBackgroudDeletions 0 useNANDECC......... 1 isYaffs2........... 1 inbandTags......... 0 / $ umount /mnt/ save exit: isCheckpointed 1 save exit: isCheckpointed 1 / $ mount -t yaffs2 /dev/mtdblock13 /mnt/ / $ df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock5 32768 18176 14592 55% / tmpfs 63956 0 63956 0% /var/tmp /dev/mtdblock13 2097152 588664 1508488 28% /mnt / $ ls -ial /mnt/ 1 drw-rw-rw- 1 root root 2048 Jan 1 00:16 . 1 drwxr-xr-x 20 root root 0 Jan 1 00:00 .. 262 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file 2 drw-rw-rw- 1 root root 2048 Jan 1 00:16 lost+found / $ ls -ial /mnt/lost\+found/ 2 drw-rw-rw- 1 root root 2048 Jan 1 00:16 . 1 drw-rw-rw- 1 root root 2048 Jan 1 00:16 .. / $ ** to force an unclean remount, I change the fs: / $ touch /mnt/dummy ** reboot without umount / $ mount -t yaffs2 /dev/mtdblock13 /mnt / $ ls -ial /mnt/ 1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 . 1 drwxr-xr-x 20 root root 0 Jan 1 00:00 .. 263 -rw-r--r-- 1 root root 0 Jan 1 00:00 dummy 262 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file 2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 lost+found / $ ls -ial /mnt/lost\+found/ 2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 . 1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .. / $ df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock5 32768 18180 14588 55% / tmpfs 63956 0 63956 0% /var/tmp /dev/mtdblock13 2097152 106372 1990780 5% /mnt / $