ciss(4) not coping with large arrays?

[Paul Saab]

On Fri, May 16, 2008 at 1:03 AM, Paul Saab <ps at mu.org> wrote:

> On Fri, May 16, 2008 at 12:50 AM, Claus Guttesen <kometen at gmail.com>
> wrote:
>
>> > Running today's RELENG_7 (although 7.0-RELEASE has the same problem),
>> > GENERIC kernel on an amd64 and I can't seem to get a da(4) device for
>> > any arrays bigger than 2TB.
>>
>> In earlier releases (5 and 6 at least) you couldn't create partitions
>> larger than 2 TB. I don't know whether work has been to circumvent
>> this in 7 but tools like fsck has to be changed as well. Have you
>> tried zfs?
>
>
> zfs has nothing to do with this.  The driver is not properly dealing with
> the large volume.
>
> set the kernel tunable in loader.conf
>
> kern.cam.da.3.minimum_cmd_size=16
> kern.cam.da.4.minimum_cmd_size=16
>
>
Actually, this has nothing to do with it either.. Please try the following
patch:

http://yogurt.org/FreeBSD/ciss_large.diff