VxFS Version 7 disk layout

Disk layout 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 up to 8 terabytes (240) and file systems up to 8 exabytes (263). The maximum file system size that can be created is currently restricted to 235 blocks. For a file system to take advantage of greater than 1 terabyte support, it must be created on a Veritas Volume Manager volume. For the 64-bit kernel versions of AIX 5.2 and 5.3, the maximum file size is 8 terabytes with the largefiles flag set and 2 gigabytes with the nolargefiles flag set, while the maximum size of the file system you can create depends on the block size:

Block Size

Currently-Supported Theoretical Maximum File System Size

1024 bytes

68,719,472,624 sectors (≈32 TB)

2048 bytes

137,438,945,248 sectors (≈64 TB)

4096 bytes

274,877,890,496 sectors (≈128 TB)

8192 bytes

549,755,780,992 sectors (≈256 TB)

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.

The Version 7 disk layout supports group quotas.

See About quota files on Veritas File System.