File System Comparison General information



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Limits


  

Maximum filename length  

Allowable characters in directory entries25  

Maximum pathname length  

Maximum file size  

Maximum volume size 4  

DECtape

6.3

A-Z, 0-9

DTxN:FILNAM.EXT = 15

369,280 bytes (577 * 640)

369,920 Bytes (578 * 640)

Level-D

6.3

A-Z, 0-9

DEVICE:FILNAM.EXT[PROJCT,PROGRM] = 7 + 10 + 15 = 32; + 5*7 for SFDs = 67

34,359,738,368 words (2**35-1); 206,158,430,208 SIXBIT bytes

Approx 12 GB (64 * 178MB)

RT-11

12 bytes

A-Z, 0-9, $

16 bytes

33,554,432 bytes (65536 * 512)

33,554,432 Bytes

V6FS

14 bytes 24

Any byte except NUL and / 26

No limit defined 12

8MiB 57

2TiB

Disk Operating System (GEC DOS)

 ?

 ?

 ?

 ? at least 131072 bytes

 ?

GEC DOS filing system extended

8 bytes

A-Z, 0-9. Period was directory separator

 ? No limit defined (workaround for OS limit)

 ? at least 131072 bytes

 ?

V7FS

14 bytes 24

Any byte except NUL and / 26

No limit defined 12

1GiB 58

2TiB

FAT12

255 bytes 24

Any Unicode except NUL 24 26

No limit defined 12

32MiB

1MiB to 32MiB

FAT16

255 bytes 24

Any Unicode except NUL 24 26

No limit defined 12

2GiB

16MiB to 4GiB

FATX

42 bytes 24

ASCII. Unicode not permitted.

No limit defined 12

2GiB

16MiB to 2GiB

Fossil

 ?

 ?

 ?

 ?

 ?

MFS

255 bytes

Any byte except :

No path (flat filesystem)

256MiB

256MiB

HFS

31 bytes

Any byte except :

Unlimited

2GiB

2TiB

FAT32

255 bytes 24

Any Unicode except NUL 24 26

No limit defined 12

4GiB

512MiB to 2TiB 7

HPFS

255 bytes

Any byte except NUL 27

No limit defined 12

2GiB

2TiB13

NTFS

254 characters + "."

Any Unicode except NUL, / or :

32,767 Unicode characters with each path component (directory or filename) up to 255 characters long 12

16EiB 55

16EiB 55

HFS Plus

255 UTF-16 characters 1

Any valid Unicode 2 26

Unlimited

16EiB

16EiB 71

FFS

255 bytes

Any byte except NUL 26

No limit defined 12

4GiB

256TiB

UFS1

255 bytes

Any byte except NUL 26

No limit defined 12

4GiB to 256TiB

256TiB

UFS2

255 bytes

Any byte except NUL 26

No limit defined 12

512GiB to 32PiB

1YiB

ext2

255 bytes

Any byte except NUL 26

No limit defined 12

16GiB to 2TiB4

2TiB to 32TiB

ext3

255 bytes

Any byte except NUL 26

No limit defined 12

16GiB to 2TiB4

2TiB to 32TiB

ext4




Any byte except NUL 26

No Limit defined 12

16GiB to 2TiB4

1024 PiB

GPFS

255 (?)

Any byte except NUL 26

No limit defined 12

No limit found

299 Bytes (2PiB tested)

GFS

255

Any byte except NUL 26

No limit defined 12

2TB to 8EB63

2TB to 8EB63

ReiserFS

4032 bytes/255 characters

Any byte except NUL 26

No limit defined 12

8TiB8 (v3.6), 4GiB (v3.5)

16TiB

Reiser4

3976 bytes

Any byte except / and NUL

No limit defined 12

8TiB on x86

 ?

OCFS

255 bytes

Any byte except NUL 26

No limit defined 12

8TiB

8TiB

OCFS2

255 bytes

Any byte except NUL 26

No limit defined 12

4PiB

4PiB

XFS

255 bytes

Any byte except NUL 26

No limit defined 12

8EiB9

8EiB9

JFS

255 bytes

Any byte except NUL 26

No limit defined 12

8EiB

512TiB to 4PiB

JFS2

255 bytes

Any Unicode except NUL

No limit defined 12

4PiB

32PiB

QFS

255 bytes

Any byte except NUL 26

No limit defined 12

16EiB 72

4PiB 72

BFS

255 bytes

Any byte except NUL 26

No limit defined 12

12288 bytes to 260GiB3

256PiB to 2EiB

AdvFS

255 characters

Any byte except NUL 26

No limit defined 12

16TiB

16TiB

NSS

256 characters

Depends on namespace used 28

Only limited by client

8TiB

8TiB

NWFS

80 bytes 52

Depends on namespace used 28

No limit defined 12

4GiB

1TiB

ODS-5

236 bytes15

 ?

4096 bytes16

1TiB

1TiB

VxFS

255 bytes

Any byte except NUL 26

No limit defined 12

16EiB

 ?

UDF

255 bytes

Any Unicode except NUL

1023 bytes 43

16EiB

 ?

ZFS

255 bytes

Any Unicode except NUL

No limit defined 12

16EiB

268EiB (2128 Bytes)

Minix V1 FS

14 or 30 bytes, set at filesystem creation time

Any byte except NUL 26

No limit defined 12

1GiB

1GiB

Minix V2 FS

14 or 30 bytes, set at filesystem creation time

Any byte except NUL 26

No limit defined 12

1GiB

1GiB

Minix V3 FS

60 bytes

Any byte except NUL 26

No limit defined 12

4GiB

4GiB

VMFS2

128

Any byte except NUL and / 26

2048

4TiB 74

64TiB

VMFS3

128

Any byte except NUL and / 26

2048

2TiB 74

64TiB




Maximum filename length

Allowable characters in directory entries25

Maximum pathname length

Maximum file size

Maximum volume size 4


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