16 messages in org.freebsd.freebsd-stableRe: Dump takes ages on SCSI. (several...| From | Sent On | Attachments |
|---|---|---|
| David Gilbert | Jul 2, 2000 1:24 pm | |
| Kent Stewart | Jul 2, 2000 2:53 pm | |
| David Gilbert | Jul 2, 2000 5:42 pm | |
| Kent Stewart | Jul 2, 2000 6:50 pm | |
| Chad R. Larson | Jul 2, 2000 8:44 pm | |
| David Gilbert | Jul 2, 2000 9:25 pm | |
| Kenneth D. Merry | Jul 2, 2000 10:55 pm | |
| David Malone | Jul 3, 2000 12:01 am | |
| kostik | Jul 3, 2000 1:35 am | |
| Gerhard Sittig | Jul 3, 2000 10:38 am | |
| Mike Smith | Jul 3, 2000 6:57 pm | |
| Mike Smith | Jul 4, 2000 4:08 am | |
| Mike Smith | Jul 4, 2000 5:22 am | |
| Gerhard Sittig | Jul 4, 2000 10:16 am | |
| Mike Smith | Jul 6, 2000 2:36 am | |
| Don Lewis | Jul 14, 2000 1:36 am |
| Subject: | Re: Dump takes ages on SCSI. (several times faster on IDE) | |
|---|---|---|
| From: | Gerhard Sittig (Gerh...@gmx.net) | |
| Date: | Jul 4, 2000 10:16:08 am | |
| List: | org.freebsd.freebsd-stable | |
On Tue, Jul 04, 2000 at 05:22 -0700, Mike Smith wrote:
The Problem with aha1542 (ISA busmaster capable controller) in PCI boards is that it is located "at the end" of a long chain to memory. Chances are, busmastering will not work at all behind the PCI to ISA bridge since all the PCI devices have higher priority and the ISA gadget never gets any access granted or at least always too late. You're better off with a PCI controller.
This is Just Not True.
Can you please tell me more about it? I'm not sure of the priority thing I mention above, but the fact that ISA busmaster devices and PCI boards somewhat collide or counter operate (sorry, lacking better words once more) is what I got from serious papers here. How direct is the access method an ISA controller has to the memory when sitting behind a bridge? I would be glad to believe a 1542B/C in a PCI machine is A Good Thing(TM). :)
virtually yours 82D1 9B9C 01DC 4FB4 D7B4 61BE 3F49 4F77 72DE DA76 Gerhard Sittig true | mail -s "get gpg key" Gerh...@gmx.net
-- If you don't understand or are scared by any of the above ask your parents or an adult to help you.
To Unsubscribe: send mail to majo...@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message