How to create a specific size file?like,solaris:mkfile. thanks.

[renx]

How to create a specific size file?like,solaris:mkfile. thanks.

[Sudhakar.J]

Hi,

Do u mean to create a file with a specific size, then u can use prealloc command.
This command creates a file in bytes.

For instance,

prealloc test 1024 --> to create one kb file by name test.


ATB,
Sudhakar

[Patrick Wallek]

Yes, you do need to use the prealloc command.

However, the file size you specify with prealloc is in BYTES, not KB, not MB, just plain old BYTES.

So, if you do:

# prealloc test 1024

You will get a 1024 BYTE file.

If you want to create a 1 MB file, you need to do:

# prealloc test 1048576

[renx]

thank you

[Fragon]

Hi, make a specific size file , you can use "prealloc", but please make sure:
1. The free space in the disk must large than the specific size;
2. If the "file" exists and not zero, the prealloc will fail;
3. Usually make a script to use prealloc, if "file" exists and not zero, empty it first; or if the free space is not enough , make a warning and exit.

BTW, please assign points to whom really help you!

-ux