For a long time I've had 2 identical drives that I want to migrate from NTFS to EXT4. They are the same size, brand..etc. I only used them for backup so I alway sync them to duplicate data on them. I have formated one to EXT4 reducing the reserved block percentage to 0 (-m 0) having the following features:
has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Already after formatting it shows 28GB of used space and it about the same amount of data that I can't copy from the NTFS drive.
After tuning the filesystem I have done a e2fsck to make sure things are OK. Still, there's ~30GB missing space. When I tried to copy back the data from the NTFS drive to the EXT4 it fails to copy ~ 30GB of data.
I am running Precise with 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64. I will attach the all data from both drives: /dev/sdb1 is the NTFS drive and /dev/sdc1 is the EXT4 drive. I am not sure if this is a normal or a bug but there's ~30GB of unaccounted missing space on the EXT4. Reformatting back to NTFS gives me back those 30GB. I have tried this multiple times.
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AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 2949 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe6dc000 irq 51'
Mixer name : 'Analog Devices AD1984A'
Components : 'HDA:11d4194a,1028027f,00100400'
Controls : 34
Simple ctrls : 20
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=2c8aae11-d4df-4920-acc5-5041b51e94f0
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
MachineType: Dell Inc. OptiPlex 760
Package: linux (not installed)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=768470c2-a727-44f8-800b-6606c3c5c948 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
RfKill:
SourcePackage: linux
StagingDrivers: mei
Tags: precise staging precise staging
Uname: Linux 3.2.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 02/18/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A02
dmi.board.name: 0G919G
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 16
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA02:bd02/18/2009:svnDellInc.:pnOptiPlex760:pvr:rvnDellInc.:rn0G919G:rvrA00:cvnDellInc.:ct16:cvr:
dmi.product.name: OptiPlex 760
dmi.sys.vendor: Dell Inc.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1007142
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.