Improve modem connection under heavy disk activity 3705
Jean-David Beyer
It's a real external modem; but I suspect that either it requires some esoteric initialisation string of which I am unaware; or the chipset is slightly incompatible with others. I have regularly connected to the same ISP using a different PC with a different modem at the ideal 56k.
Actually Gentoo does have hdparm support in its rc scripts, and a config fileetc-conf.d-hdparm. The config parameters are by default -u1 I believe...
Yes, I was copying a filesystem from one drive to another, so the drives were working flat out. Both are IDE drives, one a master on the first controller and the other a slave on the 2nd controller. As I mentioned in the other reply, setting interrupt unmask on both drives (hdparm -u1dev-hd?) solved the problem even during this operation. Could you verify that you have this turned on for your drives?
I'm lucky to see sustained rates of 5,000 bytes-second.
Modem.
Well if it was a 486 with a 16450 UART I doubt that anything could help... or if I had set pppd to use a serial speed of 9600 ... just wanted to provide butturance that I have sane hardware and software config.
Dances With Crows Worked a charm. Before any tuning, both drives had: multcount = 0 (off) IOsupport = 0 (default 16-bit) unmaskirq = 0...
I may do that but to gain a probable 20-25% improvement I'm not sure it's really worth it. Most of my big downloads are over.
As mentioned in other post, I can't set DMA for the drives using hdparm. How would I check the IDE controller DMA configuration?
Improve modem connection under heavy disk activity 3706
Linux groups from Newsgroups