Very slow performance after installing RAID controllers
wmoran at iowna.com
Thu Oct 25 10:33:45 GMT 2001
On Thursday 25 October 2001 12:57, Thomas Cameron wrote:
> (sigh) I don't "blame" Samba at all. I just know that this list
> membership has a lot more experience than I do, and I hoped that someone
> might have insight.
Sorry if I came across a bit harshly ... I didn't mean to be that way.
> > Yes, but if you FTP/scp or do any other kind of _network_ copying (other
> > than through samba) how does the performance look? If it looks as crappy
> > as the samba performance, then you need to look at your network config
> > before bothering with samba.
> ftp is also sporadic.
So it's probably not samba related, but more OS/HW related.
> I have already swapped out network cables and changed ports on the switch.
> I have also rearranged the SCSI cables. Nothing seems to work. I have a
> gut feeling that the network card driver is flakey. But, I have recompiled
> three versions of the Linux kernel, with the NIC driver compiled as a
> module and directly in the kernel and it hasn't changed anything.
I don't evny you. Problems like these are often a royal SOB to resolve.
Someone else recommended switching PCI slots. If you have the resources, try
a different brand network card. Make sure the net card isn't sharing an interrupt
with another card. That interrupt sharing works occasionsally, but now always
(in my experience) Maybe post the a question to some Linux lists about that
network card and see if others are having problems. Install FreeBSD instead
(I'm not showing any OS bias, am i? ;)
I've heard stories about a card running full-duplex while the switch runs half-
duplex causing a lot of trouble, but never come across that exact problem myself.
If there's any hardware that you can temporarily remove from the machine, try
removing it - conflicts come from the weirdest places at times.
I'm just throwing out lots of ideas. It sounds to me like you're already on the right
track, but it may take a bit of digging to get the exact problem.
I hope I've been some help. Good Luck.
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