Re: [edlug] Joe's RAID talk

[Andrew Farnsworth <farnsaw@xxx.xxx.xxx>]

Dick Middleton wrote:
> A Smith wrote:
> > I'd like to thank Joe for giving a very informative talk and live 
> > demo on Thursday evening.   I'm going to try it on my workstation  
> > with my 1Tb SATA II drives which are plugged into USB docking 
> > stations.   Cheap capacity, but not performance.
>
> I've often thought it might be fun to make a hot-swappable raid5 array 
> from 4 USB sticks and a USB hub.  Not quite TBs though, not yet!
>
> Dick
Dick,
 You might consider trying it where you put each stick hooked up to a 
separate USB hub (not external hub, but bus).  Many computers will have 
2 or 4 busses hooked up to the ports on the back of the computer.  Sure, 
try it with a single hub and a single USB 2.0 port but you will probably 
find that it maxes out the connection pretty quickly.

480 Mbit/s = 60 Mbyte/s

Many USB drives today run along at about 20+ MByte/s throughput for 
reads so you will max out a single USB port / bus with 2-3 thumbdrives.  
So use at least 2 port if you can.

Andrew Farnsworth
-
----------------------------------------------------------------------
You can find the EdLUG mailing list FAQ list at:
http://www.edlug.org.uk/list_faq.html