Re: "Misbehaving" hard disk or weird RAIDframe problem

[Greg Oster <oster%cs.usask.ca@localhost>]

Matthias Scheler writes:
> 
>       Hello,
> 
> I've created a RAID 1 volume with RAIDframe ...
[snip]
> 
> tron@colwyn:~tron#dd if=/dev/rwd2d bs=1024k count=256 of=/dev/null
> 256+0 records in
> 256+0 records out
> 268435456 bytes transferred in 3.457 secs (77649828 bytes/sec)
> tron@colwyn:~tron#dd if=/dev/rwd3d bs=1024k count=256 of=/dev/null
> 256+0 records in
> 256+0 records out
> 268435456 bytes transferred in 3.475 secs (77247613 bytes/sec)

What happens if you do both of the above dd's simultaneously?
Do you see the same levels of performance, or does it drop off 
drastically?

Is the write cache turned off on one of the drives?  What does:
  atactl /dev/rwd2d identify ; atactl /dev/rwd3d identify
say?

Later...

Greg Oster