Re: Backing up Linux to Windows 10

From	"Carlos E.R." <robin_listas@es.invalid>
Newsgroups	alt.os.linux
Subject	Re: Backing up Linux to Windows 10
Date	2026-03-23 03:35 +0100
Message-ID	<9hl69mx2p3.ln2@Telcontar.valinor> (permalink)
References	(2 earlier) <xn0pnlcvnap48rw00o@news.individual.net> <10ppvkh$3ncar$1@dont-email.me> <10pq2uc$3occt$1@dont-email.me> <10pq54h$3ov0q$1@dont-email.me> <10pq6ql$3pen6$1@dont-email.me>

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On 2026-03-23 02:59, Paul wrote:
> On Sun, 3/22/2026 9:30 PM, Lawrence D’Oliveiro wrote:
>> On Sun, 22 Mar 2026 20:53:32 -0400, Paul wrote:
>>
>>> He described a timestamp problem, so no information loss was
>>> involved. Inefficient extra copying went on, because the process
>>> thought the date on the file had changed (and it had changed, just
>>> not for the expected reason).
>>
>> Loss of timestamp info on the previously-backed-up files *does* count
>> as “information loss”. Something corrupted that info on disk.
>>
> 
> It's not loss, it is interpretation. It's a design issue.
> 
> There is little reason for all files to be synced because
> the software has detected a one hour difference (for example).
> That could happen on FAT32 with the DST change.
> 
> When two systems systems do not share up-to-date TZINFO, there can be
> artificial changes that way. I have occasionally seen OSes I've booted
> be off by an hour, and even when it is not a TZ change date.
> 
> You can see these cases in discussion threads Google throws up,
> and in some of them, a "USB stick with FAT32" not mentioned
> in the original question, is the culprit. FAT32 uses localtime,
> EXFAT uses UTC apparently, but with different granularity
> than NTFS.
> 
> You have to put on your timelord hat and start searching
> around for the source of the mis-interpretation.

Arguably, that software is not saving the metadata of the Linux files 
correctly. The time stamping on the Windows machine should be 
irrelevant. For each Linux file, the software should store separately 
the file itself, and the original metadata somewhere else, because 
Windows can not store Linux filesystem metadata. And if that metadata is 
stored separately, there can not be interpretation errors about the 
timestamp later, even if the TZ or DST change later.

My guess is that the software is storing the Linux files as Windows 
files, so attributes and metadata get lost. Which may be irrelevant, if 
all they are are movies. But if it is a system backup, then important 
metadata will be lost. Also symlinks, hardlinks, sparse files, etc.

-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-22 15:20 +0000
  Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-22 14:06 -0400
  Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-22 20:58 +0000
    Re: Backing up Linux to Windows 10 Richard Kettlewell <invalid@invalid.invalid> - 2026-03-22 21:08 +0000
      Re: Backing up Linux to Windows 10 Dan Purgert <dan@djph.net> - 2026-03-31 00:07 +0000
    Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-22 17:51 -0400
    Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-22 21:59 +0000
      Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-22 23:57 +0000
        Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-22 20:53 -0400
          Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-23 01:30 +0000
            Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-22 21:59 -0400
              Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-23 02:07 +0000
              Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-03-23 03:35 +0100
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-22 23:46 -0400
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-23 04:43 +0000
                Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-03-23 11:03 +0100
          Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-23 08:48 +0000
            Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-23 09:56 +0000
              Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-23 07:37 -0400
              Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-24 01:24 +0000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-03-24 00:31 -0400
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-24 05:37 +0000
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-24 08:38 +0000
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-24 09:20 +0000
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-24 09:46 +0000
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-04 05:44 +0000
                Re: Backing up Linux to Windows 10 rbowman <bowman@montana.com> - 2026-03-24 17:46 +0000
            Re: Backing up Linux to Windows 10 dillinger <dillinger@invalid.not> - 2026-03-23 11:06 +0100
        Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-23 08:42 +0000
          Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-23 19:12 +0000
            Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-23 22:00 +0000
              Re: Backing up Linux to Windows 10 vallor <vallor@vallor.earth> - 2026-03-23 23:17 +0000
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-24 08:46 +0000
              Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-24 01:01 +0000
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-03-24 08:44 +0000
                Re: Backing up Linux to Windows 10 vallor <vallor@vallor.earth> - 2026-03-24 15:57 +0000
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-04 05:42 +0000
  Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-14 12:30 +0000
    Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-14 09:51 -0400
      Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-14 15:04 +0000
      Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-14 21:58 +0000
        Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-15 07:44 +0000
          Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-15 04:53 -0400
            Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-15 12:31 +0000
              Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-15 09:42 -0400
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-15 14:25 +0000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-16 05:50 -0400
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-16 09:53 +0000
                Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-04-16 12:35 +0200
                Re: Backing up Linux to Windows 10 Richard Kettlewell <invalid@invalid.invalid> - 2026-04-16 20:37 +0100
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-20 00:23 +0000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-20 04:31 -0400
                Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-04-20 12:06 +0200
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-21 01:08 +0000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-21 08:04 -0400
                Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-04-21 22:52 +0200
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-21 21:19 +0000
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-21 22:13 +0000
              Re: Backing up Linux to Windows 10 Daniel70 <daniel47@nomail.afraid.org> - 2026-04-16 00:04 +1000
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-15 14:23 +0000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-16 06:05 -0400
                Re: Backing up Linux to Windows 10 Daniel70 <daniel47@nomail.afraid.org> - 2026-04-16 20:16 +1000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-16 08:53 -0400
    Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-04-14 15:51 +0200
      Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-14 11:01 -0400
        Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-04-14 20:39 +0200
        Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-14 21:56 +0000
          Re: Backing up Linux to Windows 10 "Carlos E.R." <robin_listas@es.invalid> - 2026-04-15 10:57 +0200
            Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-15 07:06 -0400
    Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-14 21:55 +0000
      Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-15 07:40 +0000
        Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-15 04:55 -0400
        Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-15 22:18 +0000
          Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-16 07:38 +0000
            Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-16 07:55 +0000
              Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-16 08:40 +0000
                Re: Backing up Linux to Windows 10 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-16 09:03 +0000
                Re: Backing up Linux to Windows 10 "Jeff Gaines" <jgnewsid@outlook.com> - 2026-04-16 09:06 +0000
                Re: Backing up Linux to Windows 10 Paul <nospam@needed.invalid> - 2026-04-16 06:40 -0400

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