# Preboot Execution Environment Preboot Execution Environment is a protocol, standard, or security technology recorded in [[Scanned_20260730-1706|Scanned_20260730-1706]]. In the reconstruction, PXE, network boot ROMs, BOOTP, and “PCI-LAN” enable booting an OS or imaging environment from the network. ## Historical and Technical Context [[Intel Virtualization Technology for Directed I-O|Intel VT-d]] is Intel's I/O virtualization technology; an [[Input-output memory management unit|IOMMU]] remaps device DMA and is fundamental to secure device assignment into VMs. Intel provides a processor-identification route for checking virtualization features ([Intel virtualization support](https://www.intel.com/content/www/us/en/support/articles/000005486/processors.html)). [[Preboot Execution Environment|PXE]], network boot ROMs, BOOTP, and “PCI-LAN” enable booting an OS or imaging environment from the network. The Hitachi string resembles a 160 GB 2.5-inch hard-drive model. ## Role in Scanned_20260730-1706 The page joins two layers needed for a recovery/virtualization workstation: firmware-level network boot and kernel-level device isolation. ## Notebook Evidence - [[Scanned_20260730-1706|Scanned_20260730-1706]], PDF page 36: Intel VT-d and network-boot firmware notes. **Evidentiary status:** The page occurrence and transcription are notebook evidence. Technical identification follows the source reconstruction’s cited research. Co-occurrence does not by itself prove ownership, deployment, or a direct operational relationship. ## Relationships and Overlays On the cited page or pages, Preboot Execution Environment appears with [[Input-output memory management unit|IOMMU]], [[Intel Virtualization Technology for Directed I-O|Intel VT-d]]. These are page-level or reconstruction-level relationships, not automatic claims of dependency. ## Cross-Notebook Significance This note extends the recovery and boot-media concerns in [[Scanned_20260730-1802|Scanned_20260730-1802]], especially its Linux services, NFS, installer inventory, and bootable USB/UEFI pages. The new notebook turns those components into a reversible acquisition and recovery workflow. ## Missed Signals and Open Leads Several copied boot-ROM strings are uncertain. The source device and BIOS vendor should be identified before interpreting “RBS,” “Sgii,” “VF,” or “Russia sourceforge.” ## Sources - [[Scanned_20260730-1706|Scanned_20260730-1706]], especially PDF page(s) 36. - `Scanned_20260730-1706.pdf`, cited as a plain archival filename; the PDF is not linked from `wiki-notes`. - External research citations used for identification remain preserved in the source reconstruction. - [Intel virtualization support](https://www.intel.com/content/www/us/en/support/articles/000005486/processors.html) ## Scanned_20260730-1719 overlay **Source evidence:** [[Scanned_20260730-1719#PDF page 26 — Kernels, terminal servers, enterprise Unix, and web fragments|page 26]], [[Scanned_20260730-1719#PDF page 29 — Coreboot, Pop!_OS, Go, IPFS, CERN, and boot research questions|page 29]], [[Scanned_20260730-1719#PDF page 53 — Ozmosis build components, PXE, and Kext-to-FFS conversion|page 53]], [[Scanned_20260730-1719#PDF page 75 — Coreboot/Libreboot summary and supported operating systems|page 75]]. [[Parrot OS|Parrot OS]] is a Debian-derived security/privacy distribution. `vmlinux` conventionally names an uncompressed Linux kernel image, while `vmlinuz` is compressed; the historical `vmunix` name comes from Unix-family kernels. [[HP-UX|HP-UX]] is Hewlett Packard Enterprise’s Unix. [[Linux Terminal Server Project|LTSP]] netboots LAN clients from a centrally maintained template, VM image, or chroot ([LTSP overview](https://ltsp.org/)). [[Magento|Magento]] is an e-commerce platform. `DXMD` likely means *Deus Ex: Mankind Divided*. [[Clinical Laboratory Improvement Amendments|CLIA]] governs U.S. clinical-laboratory testing, but the incomplete domain cannot be safely attributed. **Relationship overlay:** [[CERN|CERN]] · [[Clinical Laboratory Improvement Amendments|Clinical Laboratory Improvement Amendments]] · [[FakeSMC|FakeSMC]] · [[GNU GRUB|GNU GRUB]] · [[Go programming language|Go programming language]] · [[HP-UX|HP-UX]] · [[InterPlanetary File System|InterPlanetary File System]] · [[Libreboot|Libreboot]] · [[Linux Terminal Server Project|Linux Terminal Server Project]] · [[Magento|Magento]] · [[Parrot OS|Parrot OS]] · [[Scanned_20260730-1706|Scanned_20260730-1706]]. This occurrence connects the existing note to [[Federated Continuity Computer|Federated Continuity Computer]], [[Vendor-Agnostic Recovery|vendor-agnostic recovery]], and [[Scanned_20260730-1706|Scanned_20260730-1706]] without replacing the earlier evidence.