Re: Does a datafile know *its* blocksize ?

From: kvmb <kvmb_at_nospam.com>
Date: Tue, 05 Sep 2006 21:24:51 GMT
Message-ID: <DWlLg.60835$zT2.1066036@phobos.telenet-ops.be>

If I'm not mistaken - blocksize is stored in the second block at offset 0x30 & 0x31 for intel platform.

For AIX it's 0x32 and 0x33 - not sure about other platforms ... don't forget the byte swapping depending on the endian

Cheers,
Kurt

"Steve Howard" <stevedhoward_at_gmail.com> wrote in message news:1157488713.780698.168130_at_d34g2000cwd.googlegroups.com...
>
> Steve Howard wrote:
> > My *guess* is the block size is a set of hardcoded constant values in
> > the kernel code, that is probably represented by the 26th byte (or one
> > of them) in a datafile.
> >
> > As noted earlier, a complete waste of time, but I am always curious :)
> >
> > Regards,
> >
> > Steve
>
> I take it back, it looks like it is the 22nd byte, as a 2K block size
> is below...
>
> 2K
>
> BYTE 22 value is 8.
>
> 4K
>
> BYTE 22 value is 10.
>
> 8K
>
> BYTE 22 value is 20.
>
> 16K
>
> BYTE 22 value is 40.
>
> Regards,
>
> Steve
>
Received on Tue Sep 05 2006 - 16:24:51 CDT