Veritas File System 5.1 SP1 Administrator"s Guide (5900-1499, April 2011)

See “About quota files on Veritas File System” on page 78.

VxFS Version 7 disk layout

VxFS disk layout Version 7 is similar to Version 6, except that Version 7 enables

support for variable and large size history log records, more than 2048 volumes,

large directory hash, and SmartTier. The Version 7 disk layout can theoretically

support files and file systems up to 8 exabytes (2

). For the currently-supported

maximum file and file system sizes, point your Web browser to

http://docs.hp.com/en/oshpux11iv3.html#VxFS and view the Supported File and

File System Sizes for HFS and JFS document under the White Papers section. You

must have an EBFS license to create a file system larger than 32 TB. For 64-bit

kernels, the maximum size of the file system you can create depends on the block

size:

Currently-Supported Theoretical Maximum File System SizeBlock Size

68,719,472,624 sectors (≈32 TB)1024 bytes

137,438,945,248 sectors (≈64 TB)2048 bytes

274,877,890,496 sectors (≈128 TB)4096 bytes

549,755,780,992 sectors (≈256 TB)8192 bytes

Note: Sector size in bytes specified by the DEV_BSIZE system parameter.

If you specify the file system size when creating a file system, the block size

defaults to the appropriate value as shown above.

See the mkfs(1M) manual page.

See “About quota files on Veritas File System” on page 78.

VxFS Version 8 disk layout

VxFS disk layout Version 8 is similar to Version 7, except that Version 8 enables

support for file-level snapshots. The Version 8 disk layout can theoretically support

files and file systems up to 8 exabytes (2

). For the currently-supported maximum

file and file system sizes, point your Web browser to

http://docs.hp.com/en/oshpux11iv3.html#VxFS and view the Supported File and

File System Sizes for HFS and JFS document under the White Papers section. You

must have an EBFS license to create a file system larger than 32 TB. For 64-bit

Disk layout

VxFS Version 7 disk layout

240