Mkdosfs fat32 cluster size

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File Allocation Table

What does this mean and what value should you select? He writes:. This drive is mainly meant for storing media such as music and video.

What should I choose for the allocation unit size setting? The options range from bytes to 64K. Are there any guidelines that I might apply to other drive types? Basically, the allocation unit size is the block size on your hard drive when it formats NTFS. If you have lots of large files, keeping it higher will increase the system performance by having less blocks to seek.

But again, nowadays hard drive capacity is getting higher and higher it makes small difference by choosing the right allocation size.

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Suggest you just keep the default. Also keep in mind that the majority file are relatively small, larger files are large in size but small in units. In terms of space efficiency, smaller allocation unit sizes perform better.

The average space wasted per file will be half the chosen AUS. So 4K wastes 2K per file and 64K wastes 32K. Instead think about how the OS uses space. With a 4K AUS the data needs to be split over two blocks — and they may not be together so you get fragmentation. With a 64K AUS there are a lot fewer blocks to keep track of and less fragmentation. Have something to add to the explanation? Sound off in the the comments. Want to read more answers from other tech-savvy Stack Exchange users?

Check out the full discussion thread here. The Best Tech Newsletter Anywhere.

mkdosfs fat32 cluster size

Joinsubscribers and get a daily digest of news, comics, trivia, reviews, and more. Windows Mac iPhone Android. Smarthome Office Security Linux. The Best Tech Newsletter Anywhere Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles.File Allocation Table FAT is a computer file system architecture and a family of industry-standard file systems utilizing it.

The FAT file system is a continuing standard which borrows source code from the original, legacy file system and proves to be simple and robust. It is, however, supported for compatibility reasons by nearly all currently developed operating systems for personal computers and many mobile devices and embedded systemsand thus is a well-suited format for data exchange between computers and devices of almost any type and age from up to the present.

Originally designed in for use on floppy disksFAT was soon adapted and used almost universally on hard disks throughout the DOS and Windows 9x eras for two decades. The FAT standard has also been expanded in other ways while generally preserving backward compatibility with existing software. With the introduction of more powerful computers and operating systems, as well as the development of more complex file systems for them, FAT is no longer the default file system for usage on Microsoft Windows computers.

FAT file systems are still commonly found on floppy disks, flash and other solid-state memory cards and modules including USB flash drivesas well as many portable and embedded devices. The name of the file system originates from the file system's prominent usage of an index table, the File Allocation Table FATstatically allocated at the time of formatting. The table contains entries for each clustera contiguous area of disk storage. Each entry contains either the number of the next cluster in the file, or else a marker indicating the end of the file, unused disk space, or special reserved areas of the disk.

The root directory of the disk contains the number of the first cluster of each file in that directory; the operating system can then traverse the FAT, looking up the cluster number of each successive part of the disk file as a cluster chain until the end of the file is reached.

In much the same way, sub-directories are implemented as special files containing the directory entries of their respective files. Originally designed as an 8-bit file system, the maximum number of clusters has been significantly increased as disk drives have evolved, and so the number of bits used to identify each cluster has grown. Except for the original 8-bit FAT precursor, each of these variants is still [ when?

The FAT file system has a long history over three decades of usage on desktops and portable computers, and it is frequently used in embedded solutions.

FAT offers reasonably good performance and robustness, even in very light-weight implementations.

(Solved) Virtual Disk Service Error: The Volume Size Is Too Big

This also makes it a useful format for solid-state memory cards and a convenient way to share data between operating systems.

FAT file systems are the default file system for removable media with the exception of CDs and DVDs and as such are commonly found on floppy diskssuper-floppiesmemory and flash memory cards or USB flash drives and are supported by most portable devices such as PDAsdigital camerascamcordersmedia playersor mobile phones.

Due to the widespread use of FAT-formatted media, many operating systems provide support for FAT through official or third-party file system handlers. For many purposes, the NTFS file system is superior to FAT in terms of features and reliability; its main drawbacks are its complexity and the size overhead for small volumes as well as the very limited support by anything other than the NT-based versions of Windows, since the exact specification is a trade secret of Microsoft.

Microsoft provided a Recovery Console to work around this issue, but for security reasons it severely limited what could be done through the Recovery Console by default. The DCF file system adopted by almost all digital cameras since defines a logical file system with 8.File Allocation Table FAT is a computer file system architecture and a family of industry-standard file systems utilizing it.

The FAT file system is a continuing standard which borrows source code from the original, legacy file system and proves to be simple and robust. It is, however, supported for compatibility reasons by nearly all currently developed operating systems for personal computers and many mobile devices and embedded systemsand thus is a well-suited format for data exchange between computers and devices of almost any type and age from up to the present.

Originally designed in for use on floppy disksFAT was soon adapted and used almost universally on hard disks throughout the DOS and Windows 9x eras for two decades. The FAT standard has also been expanded in other ways while generally preserving backward compatibility with existing software. With the introduction of more powerful computers and operating systems, as well as the development of more complex file systems for them, FAT is no longer the default file system for usage on Microsoft Windows computers.

mkdosfs fat32 cluster size

FAT file systems are still commonly found on floppy disks, flash and other solid-state memory cards and modules including USB flash drivesas well as many portable and embedded devices. The name of the file system originates from the file system's prominent usage of an index table, the File Allocation Table FATstatically allocated at the time of formatting.

The table contains entries for each clustera contiguous area of disk storage. Each entry contains either the number of the next cluster in the file, or else a marker indicating the end of the file, unused disk space, or special reserved areas of the disk.

The root directory of the disk contains the number of the first cluster of each file in that directory; the operating system can then traverse the FAT, looking up the cluster number of each successive part of the disk file as a cluster chain until the end of the file is reached.

In much the same way, sub-directories are implemented as special files containing the directory entries of their respective files. Originally designed as an 8-bit file system, the maximum number of clusters has been significantly increased as disk drives have evolved, and so the number of bits used to identify each cluster has grown.

Except for the original 8-bit FAT precursor, each of these variants is still [ when? The FAT file system has a long history over three decades of usage on desktops and portable computers, and it is frequently used in embedded solutions.

FAT offers reasonably good performance and robustness, even in very light-weight implementations. This also makes it a useful format for solid-state memory cards and a convenient way to share data between operating systems. FAT file systems are the default file system for removable media with the exception of CDs and DVDs and as such are commonly found on floppy diskssuper-floppiesmemory and flash memory cards or USB flash drives and are supported by most portable devices such as PDAsdigital camerascamcordersmedia playersor mobile phones.

Due to the widespread use of FAT-formatted media, many operating systems provide support for FAT through official or third-party file system handlers. For many purposes, the NTFS file system is superior to FAT in terms of features and reliability; its main drawbacks are its complexity and the size overhead for small volumes as well as the very limited support by anything other than the NT-based versions of Windows, since the exact specification is a trade secret of Microsoft. Microsoft provided a Recovery Console to work around this issue, but for security reasons it severely limited what could be done through the Recovery Console by default.

The DCF file system adopted by almost all digital cameras since defines a logical file system with 8. This can sometimes lead to confusion if the actual type of the file system used is not mentioned or cannot be explicitly specified e.

Another common cause of confusion exists within the group of FAT16 file systems, since the term " FAT16 " refers to both, either the whole group of FAT file systems with bit wide cluster entries, or specifically only the original implementation of it with bit sector entrieswhen it becomes necessary to differentiate between the original and the later implementation.

While technically the newer variant with bit sector entries is called " FAT16B ", it is commonly referred to under the name "FAT16" as well, in particular since the original variant is rarely seen today and typically only used on small media when backward compatibility with DOS before 3. Yet another cause for misconceptions stems from some apparent redundancy and possible ambiguity in the definition of FAT volumes.

Specific threshold values for the amount of clusters [7] as stored in the BPB have been defined to determine which FAT type is used.

Even though other properties such as the size of the volume, the count of sectors, the BPB format, the file system name in an EBPB, or -in case of partitioned media- the used partition ID may often seem to be well-suited distinguishing criteria as well, they cannot reliably be used to derive the file system type from in all scenarios.

Paterson also increased the nine-character 6. Originally designed as a file system for floppy disks, FAT12 used bit entries for the cluster addresses in the FAT, which not only limited the maximum generally possible count of data clusters to for data clusters 0x to 0xFEF [23] [24] or in some controlled scenarios even up to for data clusters 0x to 0xFF5[7] [8] [25] but made FAT manipulation tricky with the PC's 8-bit and bit registers.

FAT12 was used by several manufacturers with different physical formats, but a typical floppy disk at the time was 5. The FAT12 limitations exceeded this capacity by a factor of ten or more.

By convention, all the control structures were organized to fit inside the first track, thus avoiding head movement during read and write operations, although this varied depending on the manufacturer and physical format of the disk.

The DOS formatting tool rejected such disks completely. They made the entire containing cluster unusable. While DOS supported three disk formats PC DOS 2.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up.

I read somewhere that if you want to format it with a 32kb cluster size, this is the command:. But, what if I want to format it with a 64kb cluster size?

mkdosfs - Unix, Linux Command

How can I do it? If you want the whole disk to contain a single partition, you would use -I option. So, the command becomes. Credit goes to this Ubuntu forum thread. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 7 years, 7 months ago. Active 5 years ago. Viewed 26k times. Josh 3 3 bronze badges. Hairo Hairo 2 2 gold badges 5 5 silver badges 15 15 bronze badges.

Active Oldest Votes. Anwar Anwar Note that Windows older versions don't support 64K or larger cluster sizes so if you need cross compatibility you might not want to do this: See forensicswiki. Sign up or log in Sign up using Google.

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mkdosfs fat32 cluster size

The Overflow Blog. Featured on Meta. Feedback on Q2 Community Roadmap.This switch will force mkdosfs to work properly. The message file must not exceed bytes once line feeds have been converted to carriage return-line feed combinations, and tabs have been expanded.

If the filename is a hyphen -the text is taken from standard input. The volume name can be up to 11 characters long. The default is no label. The default is or for floppies and for hard disks. With FAT32 format at least 2 reserved sectors are needed, the default is Otherwise the default is 1 only the boot sector. Must be a power of 2, i. Must be a power of 2 and greater than or equal toi. BUGS mkdosfs can not create bootable filesystems. This is default if mkdosfs is run on an Atari, then this option turns off Atari format.

Larger filesystems are managed by raising the logical sector size. Under Atari format, an Atari-compatible serial number for the filesystem is generated, and a 12 bit FAT is used only for filesystems that have one of the usual floppy sizes k, 1.

This can be overridden with the -F option. Selects the location of the backup boot sector for FAT Default depends on number of reserved sectors, but usually is sector 6. The backup must be within the range of reserved sectors. Create the file given as device on the command line, and write the to-be-created file system to it. This can be used to create the new file system in a file instead of on a real device, and to avoid using dd in advance to create a file of appropriate size.

The file created is a sparse file, which actually only contains the meta-data areas boot sector, FATs, and root directory. The resulting file can be copied later to a floppy disk or other device, or mounted through a loop device. Specify the number of file allocation tables in the file system. The default is 2. Specifies the type of file allocation tables used 12, 16 or 32 bit.

If nothing is specified, mkdosfs will automatically select between 12 and 16 bit, whatever fits better for the filesystem size. Select the number of hidden sectors in the volume.

Apparently some digital cameras get indigestion if you feed them a CF card without such hidden sectors, this option allows you to satisfy them. Assumes '0' if no value is given on the command line. Sets the volume ID of the newly created filesystem; volume-id is a bit hexadecimal number for example, 2e24ec The default is a number which depends on the filesystem creation time. This is different when usind MO disks. The filesytem can go directly to the whole disk.

Sets the message the user receives on attempts to boot this filesystem without having properly installed an operating system. Sets the volume name label of the filesystem.I know that everything about the installation is in the wiki, but I have trouble fitting the pieces together:. I am instructed how to create such a UEFI partition with gparted and fdisk. But not how to do it with cgdisk! Can you please help me figure out how to do a complete partition table with either cgdisk or parted?

I just used mb. This is not the same thing at all as fdisk which shouldn't be used with a GPT partition map. This is bad advice. Although this will work in many cases, in some cases it will prevent the machine from booting at all. My firmware, for example, will not recognise such a partition unless it is formatted with Fat 16 rather than Fat The wiki was changed because the previous advice to use a smaller EFI partition caused very significant and deeply mysterious problems.

Of course, MS expects that you'll only ever want to boot Windows. I don't know what Win 8 does, but any info I could find seemed to suggest the same. But, I know that Win 7, Ubuntu There's one driver that's used on most or all EFI implementations. I've seen it do too many weird things, such as ignore files or claim that a deleted file still exists. Perhaps some of these problems are caused by poor handling of subMiB filesystems. Unfortunately, it's not an easy thing to investigate, since the problems are difficult to reproduce with any reliability.

The issue is not with what fits and I don't know what Windows does. I would not recommend 3 for just the reason given - UEFI does not specify support.

But 1 is also problematic on at least some firmware e. My very first and very long thread on these forums concerned my attempts to get my system to boot with GPT.FAT32 is a filesystem type used by large Windows partitionsand fully supported by Linux. To create a FAT32 filesystem on a partition "format" it use mkdosfs. It is very important that you set the abovementioned values which are incorrectly set by mkdosfs.

Else the new partition will not be able to boot. Unlike one may expect, "fixboot" does not fix these wrong values either. Jump to: navigationsearch. This is much better than formatting using a windows format tool, because if partitions are big, windows format defines the cluster size as 16KB.

If you have about ' files, you save about 4GB of space due to less internal fragmentation this way. So using mkdosfs actually is worth it. Unfortunately mkdosfs version 2. You have to change some fields in the boot sector BIOS parameter block : Number of heads to the number of heads of the hard disk Wether the booting drive is a hard disk 0x80 or not 0x The latter is the default with mkdosfs.

The number of hidden sectors. The name of this field is actually misleading a bit, it is the number of sectors which are on the disk before the first sector of the new FAT-partition starts. Copy the data. Even this is not perfect e. Try to boot from the new partition. If necessary you run both windows and linux on your machinereinstall your favourite boot loader e.

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