At the beginning of HPFS, there are three control blocks occupying 18 sectors: the boot block , the super block and the spare block. The remaining storage space is divided into parts of contiguous sectors referred to as bands taking 8 MB each. A band has its own sector allocation bitmap showing which sectors in it are occupied 1 — taken, 0 — free. Each file and directory has its own F-Node located close to it on the disk — this structure contains the information about the location of a file and its extended attributes.
A special directory band located in the center of the disk is used for storing directories, while the directory structure itself is a balanced tree with alphabetical entries. Hint: The information concerning data recovery perspectives of the FS types used by Windows can be found in the articles on data recovery specificities of different OS and chances for data recovery. For detailed instructions and recommendations, please, read the manual devoted to data recovery from Windows.
Volumes are divided into sectors, typically bytes in size, then they are grouped into allocation blocks, the number of which depends on the size of the entire volume. The information concerning free and used allocation blocks is kept in the Allocation File. All allocation blocks assigned to each file as extends are recorded in the Extends Overflow File. And, finally, all file attributes are listed in the Attributes file. Data reliability is improved through journaling which makes it possible to keep track of all changes to the system and quickly return it back to the working state in case of unexpected events.
Among other supported features are hard links to directories, logical volume encryption, access control, data compression, etc.
The Apple file system is aimed to address fundamental issues present in its predecessor and was developed to efficiently work with modern flash storages and solid-state drives. This bit format uses the copy-on-write method to increase performance, which allows to copy each block before the changes to it are applied, and offers a lot of data integrity and space-saving features.
The Container Superblock stores information about the number of blocks in the Container, the block size, etc. Information about all allocated and free blocks of the Container is managed with the help of Bitmap Structures. Each volume in the Container has its own Volume Superblock which provides information about this volume.
All files and folders of the volume are recorded in the File and Folder B-Tree , while the Extents B-Tree is responsible for extents — references to file contents file start, its length in blocks.
Hint: The details related to the possibility of data recovery from these FS types can be found in the articles about the peculiarities of data recovery depending on the operating system and chances for data recovery. Open-source Linux aims at implementing, testing and using different types of file systems.
The most popular formats for Linux include:. Ext2, Ext3, Ext4 are simply different versions of the "native" Linux Ext file system. This type falls under active developments and improvements. Ext3 is just an extension of Ext2 that uses transactional file writing operations with a journal. Ext4 is a further development of Ext3, extended with the support of optimized file allocation information extents and extended file attributes. This FS is frequently used as a "root " one for most Linux installations.
ReiserFS - an alternative Linux file system optimized for storing a huge number of small files. It has good search capabilities and enables compact allocation of files by storing their tails or simply very small items along with metadata in order to avoid using large FS blocks for this purpose.
However, this format is no longer actively developed and supported. In , it made its way to the Linux kernel and is now supported by most Linux distributions, some of which, like Red Hat Enterprise Linux, even use it by default. This FS type is optimized for storing very big files and volumes on a single host. Currently, this project is open-source and implemented in most modern Linux versions.
Btrfs - a file system based on the copy-on-write principle COW that was designed by Oracle and has been supported by the mainline Linux kernel since Btrfs embraces the features of a logical volume manager, being able to span multiple devices, and offers much higher fault tolerance, better scalability, easier administration, etc. F2FS — a Linux file system designed by Samsung Electronics that is adapted to the specifics of storage devices based on the NAND flash memory that are widely used in modern smartphones and other computing systems.
This type works on the basis of the log-structured FS approach LFS and takes into account such peculiarities of flash storage as constant access time and a limited number of data rewriting cycles. Network-based file systems can be accessed from a network. Typically, network-based file systems reside on a server, and are accessed by other systems across the network.
The different types of network-based file systems are as follows:. With the NFS service, you can provide distributed resources files or directories by sharing them from a server and mounting them on multiple clients. Oracle Solaris support versions 2, 3 and 4 of the NFS protocol. With the Oracle SMB service, you can provide distributed resources files or directories to Windows and Mac OS systems by sharing them from a server and mounting them on multiple clients. Virtual file systems are memory-based file systems that provide access to special kernel information and facilities.
Most virtual file systems do not use file system disk space. Also, some virtual file systems, such as the temporary file system TMPFS use the swap space on a disk. The different types of virtual file system are as follows:.
The contract file system CTFS is an interface for creating, controlling, and observing contracts. A contract enhances the relationship between a process and a system resource. It provides richer error reporting and means of delaying the removal of a resource. Show Posts. Filesystems Supported by Solaris. Ralph Armstrong. Registered User. Join Date: Feb Could someone please tell me which filesystems are supported by Solaris? I am specifically interested in ext2, ext3, and XFS.
Is XFS included in a standard Solaris distro? Are ext2 and ext3 only supported in Read-Only using lxrun? Join Date: Aug Perl 5. Hi, Perl 5. Is there any official link from where we can find more details on the packages that are supported by each AIX versions? Thanks, Sreenadh 1 Reply. Supported filesystem. Hi, Searching for the support filesystem log on solaris. Warnings about read-only filesystems while installing a Solaris package.
I have two test machines having solaris
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