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Revert "wic/utils/partitionedfs.py: assemble .wic images as sparse files"

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It turns out that dd's conv=sparse doesn't look at the file extents, but simply
checks if a "block" is all zero.  If the block of zero was meaningful it gets
lost and if the image is subsequently written to media using a sparse-aware
writer then the block of zeros won't be written at all.

This reverts commit 5fd592fbae2e046bcb8c3a6c3ef4993fe0400676.

(From OE-Core rev: 63d15764cc2014dba9fee2186f0c8b97c2ac5682)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ross Burton
2016-04-12 15:51:50 +01:00
committed by Richard Purdie
parent e0e5426659
commit 45c0763fc9
1 changed files with 1 additions and 1 deletions
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scripts/lib/wic/utils/partitionedfs.py
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@@ -340,7 +340,7 @@ class Image(object):
source = part['source_file']
if source:
# install source_file contents into a partition
cmd = "dd if=%s of=%s bs=%d seek=%d count=%d conv=notrunc,sparse" % \
cmd = "dd if=%s of=%s bs=%d seek=%d count=%d conv=notrunc" % \
(source, image_file, self.sector_size,
part['start'], part['size'])
exec_cmd(cmd)