CERC RAID5 performance lower than everyone else

[Jim Nelson]

Adam Nielsen wrote:
>> Try setting the read-ahead buffer.   I find that helps some.
>>
>> /sbin/blockdev --setra 8192 /dev/sda
> 
> That helped - it's up to around 12MB/sec now which is almost twice the 
> speed :-)  It also peaks at 50-60MB/sec briefly, depending on what I'm 
> doing.
> 

Helped on our machine too - that's a rather useful bit of information now in my 
rc.local :)

We'll be retiring our box in a few months, but that should take a day or two off 
the data transfer time...