Re: 1x 3ware controllers vs. 2x 3ware controllers

On Sun, 1 Aug 2004, Mikael Abrahamsson wrote:

And also because scsi drives can do tagged queueing which makes it more
efficient to do a lot of smaller operations. Historically the SCSI drives
also had more cache memory which helps the situation, and the scsi
RAID controllers probably also had more cache memory on them (I know RAID
systems that have gigabytes of cache memory).

What I find amusing these days is trying to work out the "boundary" point
between a "traditional" server with an (external) RAID controller and say
a Linux server with software RAID in a purely fileserving environment (eg.
NFS/Samba, not used for local operations at all) ... Both systems as a
unit provide the same services - ie. filespace at the end of the Ether,
but what are the advantages of one over the other, and why would I ever
want a hardware RAID controller in a PCI slot in a Server PC?

Discuss... ;-)

Gordon