On Mon, 13 Jan 2003, Manuel Bouyer wrote:
>
> Hi,
> I've rescues a alphaserver 2100, which among others has this controller:
> mlx0 at pci0 dev 7 function 0: Mylex RAID (v2 interface)
> mlx0: interrupting at T2 irq 4
> mlx0: DAC960P/PD, 3 channels, firmware 2.19-0-00, 32MB RAM
> mlx0: WARNING: this f/w revision is not recommended
> mlx0: WARNING: use revision 2.42 or later
>

An old DEC SWXCR.  Wonderful!
It's really a Mylex controller, as obvious by the probe message.  Nice
but a bit old, it'll give you 10-15 Mbyte/s throughput depending on
config.

NBs:
  * It can't address beyond ca 8Gbytes on disks that are larger than that.
  * RAID sets can't have more than 8 disks (but you can have several sets)
  * Volumes can't be made larger than about 32Gbytes (but you can make
    several from a set)

> Unfortunably all disks have been pulled out, so the mlx0 config is not in
>sync
> with the hardware. From what I can see from a show dev, it was configured
> with 6 disks:
>...

> At power on, it spends a lot of time looping over:
> waiting for dra.0.0.7.0 to start...
> is there a way to clear this config, so that it doesn't spend time looking
> for its drives ?
> It seems mlxctl doesn't allow this.

The DOS configuration utility can fix this.  Download it from the Mylex
web site; this is also the place to get a firmware upgrade.

Hope this helps,
Magnus