Public bug reported:
Linux netbook 4.4.0-24-generic #43-Ubuntu SMP Wed Jun 8 19:27:37 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
exfat V 1.2.3
Camera, Win7 and Linux are in same timezone (Central European + Daylight
savings), thus UTC+2:00
Exfat formatted SD card is used.
Pictures taken by camera and files saved from Win7 show on the Windows
computer the correct modified time for the file and the picture. File
time stamp of the pictures agree with EXIF time data.
Same files show 1 hour difference on the Linux machine:
e.g.
-rwx------ 1 georg georg 33 2016-06-14 15:19:12.000000000 +0200 File created at
local time 1419 on Win7.txt
identify -verbose DSC00937.JPG
...
Properties:
date:create: 2016-06-13T22:54:06+02:00 <== wrong
date:modify: 2016-06-13T22:54:06+02:00 <== wrong
exif:BrightnessValue: -1706/2560
exif:ColorSpace: 1
exif:ComponentsConfiguration: 1, 2, 3, 0
exif:CompressedBitsPerPixel: 1/1
exif:Compression: 6
exif:Contrast: 0
exif:CustomRendered: 0
exif:DateTime: 2016:06:13 21:54:07
exif:DateTimeDigitized: 2016:06:13 21:54:07 <== correct
exif:DateTimeOriginal: 2016:06:13 21:54:07 <== correct
Expected behaviour:
Linux shall display modified file timestamp without this one hour gap.
I also tried to mount with the option tz=UCT and time_offset=60. No
change in behavior.
The same test were repeated for a FAT formatted SD card.
In this case two hour difference (probably somewhat correct reflecting
+2:00 between UTC and local time). Mounting the fat with tz=UTC ==> no
change, Mounting with time_offset=120 allevialtes the difference.
Exfat is the more advanced file system. The current implementation either does
not correct for timezone or for daylight saving. It should respect both.
** Affects: fuse-exfat (Ubuntu)
Importance: Undecided
Status: New
** Tags: exfat timestamps
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https://bugs.launchpad.net/bugs/1593202
Title:
difference in modified file timestamp exFAT volumes win7 vs. linux
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