On 2011-02-08, at 6:47 PM, [email protected] wrote: > Jose Amengual writes: >> 1.- I can see just only from ada0 to ada6 I don't see any other HDs. > > Are both of the JMB393s configured as individual drives port multiplier > mode? (as opposed to some hardware raid mode) I assume you've already > checked the cables. Strangely enough just switching drives now I can see all ten, weird but is working now.
I'm confused why you are referring to a JMB393s if my card has a siis3124 chip....or are you referring o the PMs? > >> 2.- Performance is just 131 MBs per second as report from diskinfo -t > > This is for an individual drive, correct? > How fast do you expect it to > be? This was for an individual drive. I was expecting more but it looks like I was wrong with my assumptions. > > Have you tried connecting individual drives to the 3124 controller > and tested the performance that way? I didn't try this, I will do that. > >> From what you've written, the bottleneck could be the controller, the > port multiplier, or the drive itself. 131 MB/s sounds about right > for a single drive, unless it is some super high performance drive > or you are reading from the drive's RAM rather than from the platters. > I can get 253 MB/s reading from a drive's RAM. Useful for seeing what > controllers, port multipliers and such can do without the limits of > the platter density. (the platter density goes up as new generations > of drives come out) I'd be interested in knowing what the 3124 > controller and the JMB393 PM can do. > > > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hardware > To unsubscribe, send any mail to "[email protected]" _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[email protected]"
