add notice about defective hardware to check documentation (#5753)

[ghost]

This is the back-port of #5855 for #5129.

[ThomasWaldmann]

this needs to be done in archiver.py.

[ghost]

This should cover that. It now includes both documentation patches.

[ThomasWaldmann]

something got mixed up now...

[ghost]

Ugh. I'll try to fix it.

[ghost]

That should do it.

[codecov-commenter]

Codecov Report

Merging #5859 (869aeb3) into 1.1-maint (bc36ccb) will decrease coverage by 0.57%.
The diff coverage is n/a.

❗ Current head 869aeb3 differs from pull request most recent head 3e43b19. Consider uploading reports for the commit 3e43b19 to get more accurate results

@@              Coverage Diff              @@
##           1.1-maint    #5859      +/-   ##
=============================================
- Coverage      79.90%   79.33%   -0.58%     
=============================================
  Files             27       27              
  Lines          10456    10456              
  Branches        1841     1841              
=============================================
- Hits            8355     8295      -60     
- Misses          1578     1634      +56     
- Partials         523      527       +4     

Impacted Files	Coverage Δ
src/borg/archiver.py	81.38% <ø> (+0.28%)	⬆️
src/borg/xattr.py	59.61% <0.00%> (-19.72%)	⬇️
src/borg/platform/__init__.py	75.00% <0.00%> (-15.00%)	⬇️
src/borg/platform/base.py	79.62% <0.00%> (-3.71%)	⬇️
src/borg/archive.py	81.61% <0.00%> (-0.75%)	⬇️
src/borg/helpers.py	87.48% <0.00%> (-0.36%)	⬇️
src/borg/repository.py	85.13% <0.00%> (-0.20%)	⬇️
src/borg/cache.py	85.33% <0.00%> (-0.13%)	⬇️

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