34 lines
918 B
Markdown
34 lines
918 B
Markdown
# Test Case: FLAT_PLAIN Large File
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**Test ID**: TC030-flat-plain-large
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## Objective
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Verify a greater-than-10-MiB contiguous `FLAT_PLAIN` file across thousands of
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filesystem blocks.
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## Fixture
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Use `images/flat.erofs` and `source/flat/large.bin`. Evidence asserts layout 0
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and size 10485791.
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## Procedure
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```sh
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stat -f 'size=%z blocks=%b' "$mnt/large.bin"
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dd if="$mnt/large.bin" of=/tmp/tc030-full bs=1m
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cmp /tmp/repo22-g1/source/flat/large.bin /tmp/tc030-full
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sha256 /tmp/repo22-g1/source/flat/large.bin /tmp/tc030-full
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./read_probe pread "$mnt/large.bin" 5242880 1048576 /tmp/tc030-seek
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dd if=/tmp/repo22-g1/source/flat/large.bin of=/tmp/tc030-source-seek \
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bs=1m skip=5 count=1
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cmp /tmp/tc030-source-seek /tmp/tc030-seek
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```
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Remove all outputs, unmount, and detach.
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## Expected Results
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- Reported size is exact; full and seeked data match the source.
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- No mapping error, panic, or cleanup failure occurs.
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