qemu-nbd
E724165
qemu-nbd is a QEMU utility that exposes disk image files as Network Block Device (NBD) devices, allowing them to be accessed like regular block storage.
All labels observed (2)
| Label | Occurrences |
|---|---|
| qemu-nbd canonical | 2 |
| Network Block Device protocol | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8285612 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: qemu-nbd Context triple: [QEMU, hasComponent, qemu-nbd]
-
A.
QEMU
QEMU is an open-source machine emulator and virtualizer that enables running operating systems and programs for one hardware platform on another.
-
B.
Libvirt
Libvirt is an open-source API, daemon, and management tool for managing platform virtualization technologies such as KVM, QEMU, and Xen.
-
C.
bhyve
bhyve is a lightweight, modern hypervisor for FreeBSD that enables efficient hardware-assisted virtualization of guest operating systems.
-
D.
VMDK
VMDK is a virtual disk file format originally developed by VMware for storing the contents and structure of virtual machine hard drives.
-
E.
NVMM (NetBSD Virtual Machine Monitor)
NVMM (NetBSD Virtual Machine Monitor) is a lightweight, in-kernel hypervisor framework for NetBSD that enables hardware-accelerated virtualization of guest operating systems.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: qemu-nbd Target entity description: qemu-nbd is a QEMU utility that exposes disk image files as Network Block Device (NBD) devices, allowing them to be accessed like regular block storage.
-
A.
QEMU
QEMU is an open-source machine emulator and virtualizer that enables running operating systems and programs for one hardware platform on another.
-
B.
Libvirt
Libvirt is an open-source API, daemon, and management tool for managing platform virtualization technologies such as KVM, QEMU, and Xen.
-
C.
bhyve
bhyve is a lightweight, modern hypervisor for FreeBSD that enables efficient hardware-assisted virtualization of guest operating systems.
-
D.
VMDK
VMDK is a virtual disk file format originally developed by VMware for storing the contents and structure of virtual machine hard drives.
-
E.
NVMM (NetBSD Virtual Machine Monitor)
NVMM (NetBSD Virtual Machine Monitor) is a lightweight, in-kernel hypervisor framework for NetBSD that enables hardware-accelerated virtualization of guest operating systems.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
QEMU component
ⓘ
software utility ⓘ |
| allows |
accessing disk images as regular block devices
ⓘ
mounting guest filesystems on the host ⓘ read-only access to disk images ⓘ read-write access to disk images ⓘ |
| commandName | qemu-nbd ⓘ |
| configuration | invoked via command-line options ⓘ |
| distribution | included in qemu-utils packages on many Linux distributions ⓘ |
| documentation |
QEMU manual pages
ⓘ
linked to:
QEMU
|
| implements |
Network Block Device protocol
ⓘ
linked to:
qemu-nbd
|
| input |
QEMU disk image file
ⓘ
qcow disk image file ⓘ qcow2 disk image file ⓘ raw disk image file ⓘ vdi disk image file ⓘ vmdk disk image file ⓘ |
| license | GNU General Public License ⓘ |
| operatingSystem |
Linux
ⓘ
Unix-like systems ⓘ |
| optionExample |
--connect to attach an image to an /dev/nbdX device
ⓘ
--disconnect to detach an /dev/nbdX device ⓘ --format to specify image format ⓘ --partition to export a specific partition ⓘ --read-only to export image as read-only ⓘ |
| output |
/dev/nbdX device node
ⓘ
NBD block device ⓘ |
| partOf | QEMU ⓘ |
| primaryFunction |
expose disk image files as NBD devices
ⓘ
provide block device access to disk images ⓘ |
| requires | nbd kernel module on Linux ⓘ |
| supportsFeature |
TLS-encrypted NBD connections
ⓘ
caching options ⓘ copy-on-write backing files via QEMU formats ⓘ discard (TRIM) operations depending on format ⓘ exporting entire disk ⓘ exporting specific partitions ⓘ persistent NBD exports ⓘ sparse image handling ⓘ |
| supportsProtocol | NBD ⓘ |
| typicalPath | /usr/bin/qemu-nbd ⓘ |
| upstreamRepository | QEMU source code repository ⓘ |
| usedFor |
file recovery from VM disk images
ⓘ
inspecting and modifying guest filesystems ⓘ offline maintenance of virtual machine images ⓘ resizing partitions inside disk images ⓘ testing NBD clients ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: qemu-nbd Description of subject: qemu-nbd is a QEMU utility that exposes disk image files as Network Block Device (NBD) devices, allowing them to be accessed like regular block storage.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: qemu-nbd