ROBOCOPY acts quirky just after DAYLIGHT SAVINGS TIME

Dan,

OK.


Until the ned of the month then,
Denis

Try3 said:

Countries have been experimenting in their own way with DST ever since Old Harry came up with the idea.
Our DST was, at one time, a two hour jump. So even in mid-Summer 8pm would have been dusk.


Denis

The history of British Summer Time is "interesting". The current situation:

Since 2002 it is defined by European Directives. The Summer Time Order 2002, under the European
Communities Act 1972, implemented the ninth European Directive by amending the Summer Time
Act 1972. It removed the power to vary the period of Summer Time, or provide for Double Summer
Time, by Order in Council. It changed the rules for Summer Time to agree with the European rules on
a permanent basis, starting on the last Sunday in March and ending on the last Sunday in October,
both at 1am Greenwich Mean Time. It applies in Great Britain and Northern Ireland; unlike previous
orders, it does not apply in the Bailiwick of Guernsey. When the UK left the European Union the
legislation continued as UK law.

See British Summer Time - Wikipedia, better than counting sheep...

JLArranz said:

Does Robocopy have a "fat point" :) option? If times are within say two seconds, they're considered the same. This is valid if the files do not change as frequently.

Interesting question. I had never thought about that before but I suppose it is possible that the very odd excessive re-copying I see from time to time could be related to that.

RoboCopy does have this switch which I've never really noticed before.

Code:

/FFT : Assume FAT File Times (2-second date/time granularity)

I would not have known what it meant without your post.
RoboCopy - SS64 says:-

SS64 said:

Use this when copying files to a linux NAS or other non-windows file system.

RoboCopy - MSLearn does not include that line of guidance.


Since I'm going to have to work through all my RoboCopy switches anyway, I'll add /FFT and see what happens.



Denis

Dan, JLArranz,

Success.
Our DST changeover {GMT-BST [British Summer Time] changeover} was early this morning.
I've just been running RoboCopy scripts without them repeating any incorrect files.

I worked through checking all my RoboCopy scripts last week.
- I found that only a few of them had contained the /DST script despite my remembering that switch so clearly. Perhaps what I remember so clearly was just experimenting with that switch years ago.
- I also added in that /FFT switch that I had never noticed before.
- In addition, I added in /NDL so that the commands would not waste time showing me as they were checking folders. Everything that a command writes to the screen takes time & I was getting bored with it telling me the path of each folder as it checked it for files to select.

bromberg said:

ROBOCOPY starts copying as if it were the very first time

Thanks for raising the issue.
I suggest adding in all three of these switches - /DST /FFT /NDL


My new 'norm' for a RoboCopy backup script is:-

Code:

Set BackupDrive=G:
RoboCopy "D:\Desktop" "%BackupDrive%\Desktop" /S /R:10 /MT:32 /DST /FFT /NDL /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\Work" "%BackupDrive%\Documents\Work" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\Home" "%BackupDrive%\Documents\Home" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\Cooking" "%BackupDrive%\Documents\Cooking" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\Friends" "%BackupDrive%\Documents\Friends" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\House" "%BackupDrive%\Documents\House" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\Odds N Sods" "%BackupDrive%\Documents\Odds N Sods" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
RoboCopy "D:\Documents\Suppliers" "%BackupDrive%\Documents\Suppliers" /S /R:10 /MT:32 /DST /FFT /NDL  /DCOPY:DAT /XA:SH /MIR
Pause to look at the results until you are confident in the file.  This line makes the batch file stay open when it has finished its job.
∷ Put two colons in front of Pause after you decide you no longer want it to remain open when it has finished.  Or just delete the Pause line and this line.

@Paul Black
@ArthurDent
This is significantly better than my old norm - see Sample RoboCopy backing up script - TenForums [now updated]


Spiffing,
Denis