The Mac OS Extended Volume Hard Drive Format, otherwise known as HFS+, is the file system found on Mac OS 8.1 and later, including Mac OS X. It is an upgrade from the original Mac OS Standard Format known as HFS (HFS Standard), or Hierarchical File System, supported by Mac OS 8.0 and earlier.
Overview
ANSYS HFSS software is the industry standard for simulating 3-D, full-wave, electromagnetic fields. Hi Farhad, we support any OS supported by VMware. Because we backup on image level, we really don't care what OS is there in the image. If vSphere 5 support Mac OS X, that means this OS 'automatically' becomes supported by Veeam Backup & Replication (because no special testing needs to be done on our side whatsoever). Hello, I recently tried to install our new license on the license server (Windows OS). In order to do so, I make a necessary edit to include the correct port number and change the file extension to '.lic'. Is this correct? Also, previous files had license-ansoft.lic in the file name thisyear the file received had license- ansyshybrid.txt.
Mac OS Extended format (HFS+) is a hard disk format introduced on January 19, 1998, by Apple Inc. to replace their HFS and the primary file system in Macintosh computers and iPod music players.
Up from HFS, HFS+ increases the number of allocation blocks on the disk and decreases the minimum size of a file, thus optimizing the storage capacity of a large hard disk.
Therefore, HFS+ allows for a larger maximum number of files than its' HFS counterpart. Note the difference between HFS and HFS+ in the following example:
Format Hfs+ Mac Os X
Example:
On a 4 GB hard drive, a file containing 4 KB of information would require 64 KB of space with HFS. With HFS+, it would only require 4 KB on the 4 GB hard drive. This is because the HFS allocation block size would be 16 KB and HFS+'s increased number of allocation blocks of the disk and the decreased minimum size of the blocks allows for less wasted space.
HFS+ also supports much larger files than HFS, with 32-bit block addresses as opposed to HFS's 16-bit length.
It uses Unicode to name files, encoded in UTF-16 and normalized to a form similar to Unicode Normalization Form D (NFD).
HFS+ permits file names of up to 255 UTF-16 characters in length and n-forked files. HFS+ uses a 32-bit allocation mapping table, as opposed to HFS's 16-bit table. Also, unlike most other file systems; HFS+ supports hard links to directories. HFS+ uses B-trees to store most volume metadata.
HFS+ File Limits in Mac OS X:
| Parameter | Value |
|---|---|
| Maximum number of volumes | No limit |
| Maximum number of files and folders in a file | Up to 2.1 billion |
| Maximum volume size and file size: (Mac OS X v 10.0 – 10.1.5) | 2TB |
| Maximum volume size and file size: (Mac OS X v 10.2 – 10.2.8) | 8TB |
| Maximum volume size and file size (Mac OS X v 10.3 – 10.3.9) | 16TB |
| Maximum volume size and file size (Mac OS X v 10.4 and later) | Almost 8 EB |
The following table lists software packages with their own article on Wikipedia that are nominal EM (electromagnetic) simulators;
| Name | License | Windows | Linux | 3D | GUI | Convergence detector | Mesher | Algorithm | Area of application |
|---|---|---|---|---|---|---|---|---|---|
| NEC | open source | Yes | Yes | Yes | In some distributions | Yes | manual | MoM | Antenna modeling, especially in Amateur Radio. Widely used as the basis for many GUI-based programs on many platforms (including popular distributions such as 4nec2 and EZnec on Windows, xnec2c on Linux, and cocoaNEC for Mac OS X). Version 2 is open source, but Versions 3 and 4 are commercially licensed. |
| Momentum | commercial | Yes | Yes | Partial | Yes | Yes | equidistant | MoM | For passive planar elements development, integrated into Agilent EEsofAdvanced Design System. |
| HFSS | commercial | Yes | Yes | Yes | Yes | Yes | Automatic adaptive | FEMFDTD PO Hybrid FEBI MoM Eigen Mode | For antenna/filter/IC packages, Radome,RFIC,LTCC,MMIC,Antenna Placement,Wave guides, EMI,FSS,Metamaterial,Composite Material, RCS-Mono and Bi development. |
| XFdtd | commercial | Yes | Yes | Yes | Yes | Yes | Automatic Project Optimized | FDTD | RF and microwave antennas, components, and systems, including mobile devices. MRI coils, radar, waveguides, SAR validation. |
| AWR Axiem | commercial | Yes | Yes | Yes | Yes | Yes | Automatic, Hybrid | MoM | PCBs, Multi-Layer PCBs, LTCC, HTCC, On-Chip Passives, Printed Antennas. Integrated into Microwave Office |
| AWR Analyst | commercial | Yes | Yes | Yes | Yes | Yes | Automatic and Adaptive | FEM | 3D structurers(including 3D Antennas), Waveguides, 3D filters, PCBs, Multi-Layer PCBs, LTCC, HTCC, On-Chip Passives, Printed Antennas. Integrated into Microwave Office |
| JCMsuite | commercial | Yes | Yes | Yes | Yes | Yes | Automatic, error-controlled | FEM | Nano- and micro-photonic applications (light scattering,[1] waveguide modes,[2] optical resonances[3]). |
| COMSOL Multiphysics | commercial | Yes | Yes | Yes | Yes | Yes | Automatic | FEM, Boundary element method, Ray Tracing | General Purpose |
| FEKO | commercial | Yes | Yes | Yes | Yes | Yes | Automatic or manual; adaptive | For antenna analysis, antenna placement, windscreen antennas, microstrip circuits, waveguide structures, radomes, EMI, cable coupling, FSS, metamaterials, periodic structures, RFID | |
| Elmer FEM | open source (GPL) | Yes | Yes | Yes | Yes | Yes | manual, or can import other mesh formats | FEM | General Purpose, includes 2D and 3D magnetics solvers, both static and harmonic. 3D solver is based on the Whitney AV formulation of Maxwell's equations. |
References[edit]
Apple_hfs Macos Base System
- ^Hoffmann, J.; et al. (2009). Bosse, Harald; Bodermann, Bernd; Silver, Richard M (eds.). 'Comparison of electromagnetic field solvers for the 3D analysis of plasmonic nano antennas'. Proc. SPIE. Modeling Aspects in Optical Metrology II. 7390: 73900J. arXiv:0907.3570. Bibcode:2009SPIE.7390E..0JH. doi:10.1117/12.828036. S2CID54741011.
- ^Wong, G. K. L.; et al. (2012). 'Excitation of Orbital Angular Momentum Resonances in Helically Twisted Photonic Crystal Fiber'. Science. 337 (6093): 446–449. Bibcode:2012Sci...337..446W. doi:10.1126/science.1223824. PMID22837523. S2CID206542221.
- ^Maes, B.; et al. (2013). 'Simulations of high-Q optical nanocavities with a gradual 1D bandgap'. Opt. Express. 21 (6): 6794–806. Bibcode:2013OExpr..21.6794M. doi:10.1364/OE.21.006794. hdl:1854/LU-4243856. PMID23546062.
Hfss Mac Os Update
