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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:34:26 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:35:44 +0000
commit25f8033d556aa17afaea4a5196ea7a69fe248320 (patch)
tree0f056db167683be54ea1e5e72d29d6069af55e7d /results/classifier/deepseek-2-tmp/output/hypervisor/2102
parent8e6da29e4ee5fc14bc1cc816a24f21271f14090d (diff)
downloademulator-bug-study-25f8033d556aa17afaea4a5196ea7a69fe248320.tar.gz
emulator-bug-study-25f8033d556aa17afaea4a5196ea7a69fe248320.zip
add new temporary deepseek-r1:14b results
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+
+"qemu-img resize -f qcow2" produces broken disk images
+Description of problem:
+The documentation of `qemu-img` at
+<https://www.qemu.org/docs/master/tools/qemu-img.html>
+makes it sound like `qemu-img resize` supports various image formats
+(raw, qcow2, etc.) in the same way.
+
+But it doesn't. While `qemu-img resize -f raw` works as expected,
+`qemu-img resize -f qcow2` produces broken disk images.
+Steps to reproduce:
+```
+$ wget http://nycdn.netbsd.org/pub/NetBSD-daily/netbsd-9/latest/evbarm-aarch64/binary/gzimg/arm64.img.gz
+$ gunzip arm64.img
+```
+
+First resize, then convert:
+```
+$ cp arm64.img arm64-rc.img
+$ qemu-img resize -f raw arm64-rc.img 10G
+$ qemu-img convert -f raw -O qcow2 arm64-rc.img arm64-rc.qcow2
+$ rm -f arm64-rc.img
+```
+
+First convert, then resize:
+```
+$ qemu-img convert -f raw -O qcow2 arm64.img arm64-cr.qcow2
+$ qemu-img resize -f qcow2 arm64-cr.qcow2 10G
+```
+
+Attach to a VM in VirtualBox (as an additional SATA disk) and start that VM.
+
+arm64-rc.qcow2 =>
+`# fdisk /dev/sdb` => it has two partitions.
+
+arm64-cr.qcow2 =>
+`# fdisk /dev/sdb` => it has no partitions!
+And the VM cannot be cleanly shut down. I had to manually kill the VirtualBoxVM
+process.
+Additional information:
+