On Fri, Mar 19, 2021 at 11:47:09AM +0800, 钱非凡 wrote: > Thanks for replying, rich. > > here are some informations i gathered. the guest is linux (centos) and i find > out the guest's file system is 'xfs' using `df -hT`: > > ``` > $ df -hT > Filesystem Type Size Used Avail Use% Mounted on > /dev/mapper/centos-root xfs 8.0G 1003M 7.1G 13% / > devtmpfs devtmpfs 484M 0 484M 0% /dev > tmpfs tmpfs 496M 0 496M 0% /dev/shm > tmpfs tmpfs 496M 6.8M 489M 2% /run > tmpfs tmpfs 496M 0 496M 0% /sys/fs/cgroup > /dev/vda1 xfs 1014M 132M 883M 14% /boot > tmpfs tmpfs 100M 0 100M 0% /run/user/0 > ``` > > and sgdisk version is 0.8.10: > > ``` > $ sgdisk --version > GPT fdisk (sgdisk) version 0.8.10 > ``` > > also, i tried the command you gave. it came out the same output: > > ``` > $ virt-rescue --ro -d 138093b9b33345c38e58efa014036bd8 > ><rescue> sgdisk /dev/sdb -i 1 > Invalid partition data! > ```
Yup, basically sgdisk thinks the partition is invalid. Version 0.8.10 is really ancient - from 2014, so I'd start with a newer version. Rich. > but strange things happened when i tried some other reports' suggestions: > > https://listman.redhat.com/archives/libguestfs/2016-February/msg00145.html > https://listman.redhat.com/archives/libguestfs/2018-November/msg00026.html > > i did these things: > > 1. set LIBGUESTFS_BACKEND to direct; > 2. recompile the `libguestfs-1.40.2-10.el7.src.rpm` without the ` > XXXX-RHEL-7-Reject-use-of-libguestfs-winsupport-features-.patch `; > 3. run the `virt-rescue` command again. > > ``` > $ virt-rescue --ro -d 138093b9b33345c38e58efa014036bd8 > ><rescue> sgdisk /dev/sdb -i 1 > Creating new GPT entries. > Partition #1 does not exist. > ``` > > and the command works somehow. apparently, i still dont understand what > happened indeed. and i have read about the official explanation of > LIBGUESTFS_BACKEND, is this something to do with libvirt? is it a bug or > something? > > https://libguestfs.org/libguestfs-test-tool.1.html# > trying-out-with-without-libvirt It's unlikely that libguestfs or libvirt or the backend has anything to do with this. The partition is corrupt and/or ancient sgdisk has a bug. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v _______________________________________________ Libguestfs mailing list [email protected] https://listman.redhat.com/mailman/listinfo/libguestfs
