File Systems

File Systems  is the information,how it is stored and retrieved.There are many different kinds of file systems. Each one has different structure and logic. Each one has different properties of speed, flexibility, security, size and more. Some file systems have been designed to be used for specific applications. For example the ISO 9660 file system is designed specifically for optical disks.Another example Microsoft Windows operating systems started and supportedvarious versions of the File Allocation Table (FAT) file system. In addition to FAT, all Microsoft
Windows operating systems since Windows NT support a newer file system called New Technology
File System (NTFS).All modern versions of Windows also support exFAT, a file system designed for flash drives.

The difference between a disk or partition and the filesystem it contains is important. A few programs (including, reasonably enough, programs that create filesystems) operate directly on the raw sectors of a disk or partition; if there is an existing file system there it will be destroyed or seriously corrupted. Most programs operate on a filesystem, and therefore won’t work on a partition that doesn’t contain one (or that contains one of the wrong type).

Convert file system
We can convert one file system in an operating system to another file system.
In windows using Convert command
CONVERT volume /FS:NTFS [/V] [/CvtArea:filename] [/NoSecurity] [/X]

volume      Specifies the drive letter (followed by a colon),
mount point, or volume name.
/FS:NTFS    Specifies that the volume is to be converted to NTFS.
/V          Specifies that Convert should be run in verbose mode.
/CvtArea:filename
Specifies a contiguous file in the root directory to be
the place holder for NTFS system files.
/NoSecurity Specifies the converted files and directories security
settings to be accessible by everyone.
/X          Forces the volume to dismount first if necessary.
All opened handles to the volume would then be invalid.

Check my another blog for how to convet to XFS in linux in beloe link
https://teckadmin.wordpress.com/2012/01/30/xfs-filesystem-in-fedora/

check and Repair Damaged System Files while Windows
SFC [/SCANNOW] [/SCANONCE] [/SCANBOOT] [/REVERT] [/PURGECACHE] [/CACHESIZE=x]

/SCANNOW        Scans all protected system files immediately.
/SCANONCE       Scans all protected system files once at the next boot.
/SCANBOOT       Scans all protected system files at every boot.
/REVERT         Return scan to default setting.
/PURGECACHE     Purges the file cache.
/CACHESIZE=x    Sets the file cache size.

Checks a disk and displays a status report
CHKDSK [volume[[path]filename]]] [/F] [/V] [/R] [/X] [/I] [/C] [/L[:size]]

volume          Specifies the drive letter (followed by a colon),
mount point, or volume name.
filename        FAT/FAT32 only: Specifies the files to check for fragmentation
.
/F              Fixes errors on the disk.
/V              On FAT/FAT32: Displays the full path and name of every file
on the disk.
On NTFS: Displays cleanup messages if any.
/R              Locates bad sectors and recovers readable information
(implies /F).
/L:size         NTFS only:  Changes the log file size to the specified number
of kilobytes.  If size is not specified, displays current
size.
/X              Forces the volume to dismount first if necessary.
All opened handles to the volume would then be invalid
(implies /F).
/I              NTFS only: Performs a less vigorous check of index entries.
/C              NTFS only: Skips checking of cycles within the folder
structure.

The /I or /C switch reduces the amount of time required to run Chkdsk by
skipping certain checks of the volume.

>fsutil fsinfo volumeinfo c:
Volume Name : C_FREEDOS9
Volume Serial Number : 0xf5b14fe
Max Component Length : 255
File System Name : FAT32
Preserves Case of filenames
Supports Unicode in filenames

usages
>fsutil
—- Commands Supported —-

behavior        Control file system behavior
dirty           Manage volume dirty bit
file            File specific commands
fsinfo          File system information
hardlink        Hardlink management
objectid        Object ID management
quota           Quota management
reparsepoint    Reparse point management
sparse          Sparse file control
usn             USN management
volume          Volume management

Refferences
http://en.wikipedia.org/wiki/List_of_file_systems
http://www.tldp.org/LDP/sag/html/filesystems.html
http://en.wikipedia.org/wiki/ZFS
http://en.wikipedia.org/wiki/XFS
http://en.wikipedia.org/wiki/Comparison_of_file_systems

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Posted on January 20, 2014, in General, Storage Technologies, Uncategorized, Windows. Bookmark the permalink. Leave a comment.

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