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Ext4 FS has claimed 3% of partition space. Where has this gone and can I get it reclaimed? I have tried disabling Journals for the ext4 partition. Even this is not helping. Any other tricks I can try to get the space reclaimed other than reverting back to ext3?

$ lsb_release -cr 

Release:    12.04
Codename:   precise

df -hP |grep media

/dev/sda3        21G  430M   20G   3% /media/MAIL

/dev/sda2       148G  188M  148G   1% /media/DATA => if I move this to ext4 its claiming 2.4G 

/dev/sda3 on /media/MAIL type ext4 (rw,nosuid,nodev,uhelper=udisks)

/dev/sda2 on /media/DATA type ext3 (rw,nosuid,nodev,uhelper=udisks)

$ sudo tune2fs -l /dev/sda3 |grep 'Reserved block count'

Reserved block count:     0

$ sudo tune2fs -l /dev/sda2 |grep 'Reserved block count'

Reserved block count:     0

NO hidden files or directories

$ sudo du -ah *;pwd

16K lost+found
/media/MAIL
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2 Answers 2

You can use tune2fs to adjust this, though I would think twice about doing so on /

sudo tune2fs -m 1 /dev/sda1

would change the reserved space to 1% on sda1.

Change drive number to suit.

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its already tuned to 0 Reserved block count: 0 –  rejith Apr 28 '12 at 8:00
    
/dev/sda3 20G 172M 20G 1% /media/MAIL Release: 11.0 Codename: natty For the older kernel its showing differently.Any settings changed at kernel side?? –  rejith Apr 29 '12 at 5:44

All my data & archives are on NTFS-COMPRESSED partitions (in the extended partition). The 'Ubuntus seem trouble-free, in the 'Ubuntu-op systems. Trouble happens when I access these with Windows, or if Linux crashes. In these cases, only Windows check disk repairs my damaged files.

The Linux equivalent to NTFS-compressed is still in alpha-testing, with no defragging, no disk repair, file-undo, etc. yet available.

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