From: David Lang (no email)
Date: Thu Dec 02 2004 - 15:07:28 EST
On Thu, 2 Dec 2004, Jules Agee wrote:
> Date: Thu, 02 Dec 2004 10:11:21 -0800
> From: Jules Agee <>
> To:
> Subject: Re: best filesystem for imap server
>
> David Lang wrote:
>> also note that if you are useing IDE drives you have no way of really
>> knowing when the data has hit the platter (as opposed to just being in the
>> buffer of the drive) as many of the drives will lie to you and tell you
>> the write is complete once it hits the buffers.
>
> I think they use capacitors that will hold enough charge to allow flushing
> the buffers to disk when there's a power loss.
they used to, but nowdays when the bugger is 8M (or larger), potentially
with many seeks they don't have any capacitors large enough to hold that
much power (disassemble a failed drive sometime and try to find any
significant capacitors in it)
David Lang
> --
> Jules Agee
> System Administrator
> Pacific Coast Feather Co.
> x284
> ---
> Cyrus Home Page: http://asg.web.cmu.edu/cyrus
> Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
>
-- There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies. -- C.A.R. Hoare --- Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
|
|
|