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authorChristian Krinitsin <mail@krinitsin.com>2025-05-30 14:51:13 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-05-30 14:51:13 +0000
commit225caa38269323af1bfc2daadff5ec8bd930747f (patch)
treee0a5fefde9ee100ba6f32fb36de6707490e4164e /mailinglist/output_launchpad/877498
parent904141bfb8d5385b75eb3b7afec1dcda89af65a7 (diff)
downloademulator-bug-study-225caa38269323af1bfc2daadff5ec8bd930747f.tar.gz
emulator-bug-study-225caa38269323af1bfc2daadff5ec8bd930747f.zip
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+qemu does not pass sector size from physical devices to virtual devices
+
+When passing a physical disk (i.e. a multipathed fcal volume in my case) with a 4k sector size as raw image to qemu (-drive file=/dev/mapper/hartebeest-sys,if=none,id=drive-virtio-disk0,boot=on,format=raw), the resulting virtual device has a sector size of 512b, rendering the partition table unusable!
+
+QEMU 0.12 is pretty much outdated ... can you still reproduce this issue with the latest version of QEMU, or can we close this bug nowadays?
+
+Hi,
+
+I can’t verify it for the logical block size right away, but
+this bug still present for the physical block size in qemu-kvm 1:2.1+dfsg-1.
+
+I will try to verify this bug with testing soon
+
+> On 20. Mar 2017, at 23:57, Thomas Huth <email address hidden> wrote:
+>
+> QEMU 0.12 is pretty much outdated ... can you still reproduce this issue
+> with the latest version of QEMU, or can we close this bug nowadays?
+>
+> ** Changed in: qemu
+> Status: New => Incomplete
+>
+> --
+> You received this bug notification because you are subscribed to the bug
+> report.
+> https://bugs.launchpad.net/bugs/877498
+>
+> Title:
+> qemu does not pass sector size from physical devices to virtual
+> devices
+>
+> Status in QEMU:
+> Incomplete
+>
+> Bug description:
+> When passing a physical disk (i.e. a multipathed fcal volume in my
+> case) with a 4k sector size as raw image to qemu (-drive
+> file=/dev/mapper/hartebeest-sys,if=none,id=drive-virtio-
+> disk0,boot=on,format=raw), the resulting virtual device has a sector
+> size of 512b, rendering the partition table unusable.
+>
+> Versions used: QEMU 0.12.5 (qemu-kvm-0.12.5) from debian unstable
+>
+> To manage notifications about this bug go to:
+> https://bugs.launchpad.net/qemu/+bug/877498/+subscriptions
+>
+
+AVE!
+ Philipp S. Tiesel / phils…
+--
+ {phils}--->---(<email address hidden>)--->---(http://phils.in-panik.de)----,
+ wenn w eine aube ist dn man au dran dre en |
+ o Schr an muss hc h (Kurt Schwitters) |
+:wq! <----(phone: +49-179-6737439)---<---(jabber: <email address hidden>)----'
+
+
+
+QEMU 2.1 is also not supported anymore. Please test with the latest upstream QEMU version (2.8 ... or the latest 2.9 release candidate) - or otherwise report the bug in the bug tracker of your distribution instead.
+
+[Expired for QEMU because there has been no activity for 60 days.]
+
+Recent QEMU is able to do read-modify-write operations when using 512 byte logical sectors in the VM and 4K logical sectors in the host.
+