id = 2049
title = "drive-mirror RBD thin"
state = "opened"
created_at = "2023-12-21T06:46:48.169Z"
closed_at = "n/a"
labels = ["Storage"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2049"
host-os = "【CentOS Linux release 7.9.2009 (Core)】"
host-arch = "x86_64"
qemu-version = "QEMU emulator version 8.1.92 (v8.2.0-rc2-48-gd451e32ce8)"
guest-os = "CentOS7"
guest-arch = "x86_64"
description = """I found that this problem was first discovered in 2014. There was a post 
[2014 bug description](https://lists.gnu.org/archive/html/qemu-devel/2014-10/msg01231.html )、
[2014 patch](https://patchwork.ozlabs.org/project/qemu-devel/patch/1433747185-16797-2-git-send-email-famz@redhat.com/)
mentioning this bug. 
The patch in the post said that this problem had been solved, but after trying and asking, I found that the problem had not been solved.
Later, I saw this problem in the [2017 bug description](https://forum.proxmox.com/threads/drive-mirror-rbd-thin.33250/#post-613502) forum and it was said that there was a patch to fix it, but it was not.
I tried the latest qemu version and found that this problem has not been solved."""
reproduce = "n/a"
additional = """nbd is normal, but rbd is wrong！"""