Re: LSI MegaRAID SAS 9240-4i hangs system at boot
On Sun, 20 May 2012, Ramon Hofer wrote:
> On Sat, 19 May 2012 13:06:40 -0300, Henrique de Moraes Holschuh wrote:
> > On Sat, 19 May 2012, Ramon Hofer wrote:
> >> On Sat, 19 May 2012 04:19:33 -0500, Stan Hoeppner wrote:
> >> > On 5/19/2012 2:52 AM, Ramon Hofer wrote:
> >> >> On Fri, 18 May 2012 17:57:56 -0500, Stan Hoeppner wrote:
> >> >>> On 5/18/2012 9:39 AM, Shane Johnson wrote:
> >> >>>> After that I would look to see if
> >> >>>> something isn't shorting out a USB port.
> >> >>>
> >> >>> Yes, USB is the cause of the over-current errors, which is plainly
> >> >>> evident in his screen shot. But we don't yet know if this USB
> >> >>> problem is what's hanging the system. Further troubleshooting is
> >> >>> required.
> >> >>
> >> >> The strange thing is as I mentioned in another post is that on the
> >> >> mb usb port 8 there's nothing attached and I haven't found where
> >> >> port 7 is :-?
> >> >
> >> > I wouldn't worry about the USB errors at this point. Unless there is
> >> > some larger issue with insufficient power on the motherboard causing
> >> > the USB current error, it's likely unrelated to the storage hardware
> >> > issue.
> >> > Fix it first, then worry about the USB errors. Given you have no
> >> > device plugged into those ports, it could be a phantom error.
> >>
> >> Yes I hope you're right with the phantom error :-) Especially because I
> >> can't find port 7. No label on the mb pcb nor in it's documentation.
> >
> > It might well mean one of the power planes is oversubscribed, and THAT
> > can cause anything up to and including damage to hard disks, data
> > corruption, and crashes.
>
> Thanks for the suggestion, Henrique!
> The PSU is a 750 W so I think it should be enough for now.
Yes, it is probably enough. You have to do a lot to overpower a *good* 750W
PSU (a crappy one, OTOH...).
You should still do all testing with the minimal hardware setup. From
experience, you also need to be able to test using no keyboard or a
different keyboard (and mouse)... USB is supposed to be safe from this crap
as it can detect overcurrent, but since it IS detecting overcurrent in your
case (be it a faulty alarm or not)...
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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