> -----Original Message-----
> From: Jason Chapman (JAC2) [mailto:jason@...]
> Sent: Tuesday, January 21, 2003 2:19 PM
> To: ib-support@yahoogroups.com
> Subject: Re: [ib-support] stripped GDB file
>
>
>
> "Kotala Zdeněk" <Zdenek.Kotala@...> wrote in message > Is
> forced write
> setting only IB/FB cache matter or switch off OS file
> > cache too?
>
> with forced write on AFAIK, FB tells the OS to flush the write buffer
> immediately. I was under the impression that Windows takes this as a
> non-cacheable write and puts it in its immediate queue. I
> don't know if
> this is asynchronous or not.

Thanks

> You'll have to ask a Windows guru (i.e. not me), to see if
> there are any
> settings to change the write profile.

I asked our windows guru and windows API have synchronous write.
If IB/FB using this function in forced write mode all are relative OK,
but there are problem with disk and RAID controler cache.
Some inteligent cache optimalize disk's writes and change
write order without back information to OS. For safety (and lower speed) is
good switch off this features if it's possible.


Zdenek