Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

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Description of problem:

qemu-img convert will be failed with "qemu-img: error while writing sector 0: Permission denied" when writing to Windows NFSServer. 


Version-Release number of selected component (if applicable):
qemu-img-4.2.0-48.module+el8.4.0+10368+630e803b.x86_64


How reproducible:

Steps to Reproduce:
1. Mount directory exported by NFSServer on Windows Server 2016 Standard
# mount -o rw,sync,vers=3 NFSServer_IP_ADDR:/TEST /mnt/

2.
# qemu-img convert -O raw -f qcow2 /root/cirros-0.5.2-x86_64-disk.img /mnt/test8.img
qemu-img: error while writing sector 0: Permission denied



Actual results:
qemu-img failed with "qemu-img: error while writing sector 0: Permission denied"

Expected results:
qemu-img should work fine without the error


Additional info:
When using RHEL7.9 client, qemu-img convert will completed without error 

  # mount -o rw,sync,vers=3 NFSServer_IP_ADDR:/TEST /mnt/
  # qemu-img convert -O raw -f qcow2 /root/cirros-0.5.2-x86_64-disk.img /mnt/test7.img


When mount with nolock on RHEL8.4 client, qemu-img convert will completed without error 

  # mount -o rw,sync,vers=3,nolock NFSServer_IP_ADDR:/TEST /mnt/
  # qemu-img convert -O raw -f qcow2 /root/cirros-0.5.2-x86_64-disk.img /mnt/test8.img

*** Bug 1985249 has been marked as a duplicate of this bug. ***

With the customer-facing issue worked around, I'll move this to the backlog at low priority.

Bulk update: Move RHEL8 bugs to RHEL9. If necessary to resolve in RHEL8, then clone to the current RHEL8 release.

As we discussed this on a recent meeting, the issue is really on the NFS server, and the KB article (https://access.redhat.com/solutions/6231411) is accurate in working around it.