Re: 2.2.x fails to identify hard disk buffer?

Andrea Ferraris (ferraris@biella.alpcom.it)
Mon, 01 Nov 1999 20:55:51 +0100


Alan Cox wrote:
>
> > Fujitsu hard disk, model MHC2040AT. Linux says that the disk has 0KB
> > cache, Fujitsu says it has a 512KB buffer. What's going on here?
>
> Linux is reporting what the drive tells it.

"hda: FUJITSU MPB3032ATU, 3093MB w/0kB Cache, CHS=785/128/63, UDMA"
my kernel says at boot time.

I have the same problem since years (in 2.0.xx too), but I blindly trust
in
Linux (the salesman didn't told me that the disk had some cache and he
told my
that it was UDMA), so I thought that I got a bad hard disk drive (it was
really
cheap, maybe too much cheap and anyway it works).

But it seems to me that your reply maybe it's a bit too much
"political":
it is in a general and ignorant (I speak for me and not for my employer)
way there are at least 2 manner for a such result; it is
1) the drive says buffer size equal 0 and Linux kernel reports it
2) the drive says correctly some buffer size different from 0 and Linux
kernel
doesn't understand and shows and use 0.

Why are you completely sure that 2) in such cases is false?

Andrea Ferraris

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/