Filesystem Sizing Query

[Cliff Lim Kok Hwee]

Hi Forum,

I discovered the following ambiguous in terms of sizing. The available + sum does not tally with the total?

/dev/vg00/lvol11 8192000 79260 7605709 1% /var/adm/crash

I am clueless.

regards/cliff

[Paul_481]

Hello Cliff,

I assume that you use the "bdf" command to arrive at that.

The first column "/dev/vg00/lvol11" indicates the filesystem

The second column "8182999" indicates your total filesystem size in Kb.

The third column "79260" indicates size of the filesystem used.

The fourth column "7605709" indicates the free size of your filesystem.

The fifth column "%1" indicates the percentage use of the filesytem

The last column "/var/adm/crash" indicates the directory where your file system is mounted.

Hope that helps,

Regards,

Paul

[Sunil Sharma_1]

Hi,

Every file system keep soem space reserve for File system overhead. THat's why there is difference.This is the amount called minfree !!!

Sunil

[Fred Ruffet]

from bdf manpage :
The bdf command does not account for any disk space reserved for swap
space, or used for the HFS boot block (8 KB, 1 per file system), HFS
superblocks (8 KB each, 1 per disk cylinder), HFS cylinder group
blocks (1 KB - 8 KB each, 1 per cylinder group), and inodes (currently
128 bytes reserved for each inode). Non-HFS file systems may have
other items not accounted for by this command.

Regards,

Fred

[Eric Antunes]

Hi Cliff,

This seems to be normal as said in bfd manual:

"The bdf command does not account for any disk space reserved for swap space, or used for the HFS boot block (8 KB, 1 per file system), HFS superblocks (8 KB each, 1 per disk cylinder), HFS cylinder group blocks (1 KB - 8 KB each, 1 per cylinder group), and inodes (currently 128 bytes reserved for each inode). Non-HFS file systems may have other items not accounted for by this command."

Best Regards,

Eric Antunes

[Franky_1]

Hi,

there's a certain "security reserve" in each FS - that's the reason for the difference

Regards

Franky