RE: Many hdX-devices?

1999-07-13 Thread Andre M. Hedrick
Andrew, I need a performance report about the RAID system(s) that you were building, thanks. On Mon, 13 Jul 1998, Tom Livingston wrote: A submitted report by Andrew Doane <[EMAIL PROTECTED]> PIIX4: IDE controller on PCI bus 00 dev 21 PIIX4: not 100% native mode: will probe irqs later ide0

RE: Many hdX-devices?

1999-07-13 Thread Tom Livingston
Andre Hedrick wrote: > > I have a system with 12 udma disks, and in practice it's been a > > nightmare. Once you start using more than two interfaces the > > auto-tuning code in the kernel ceases to work correctly, so you > > have to "tune up" each disk after > > The tuning code fails?? News

RE: Many hdX-devices?

1999-07-13 Thread Andre M. Hedrick
> I have a system with 12 udma disks, and in practice it's been a nightmare. > Once you start using more than two interfaces the auto-tuning code in the > kernel ceases to work correctly, so you have to "tune up" each disk after The tuning code fails?? News to me. I have several reports th

UDMA-66 tuning (was Re: Many hdX-devices?)

1999-07-13 Thread D. Carlos Knowlton
Tom Livingston wrote: > I have a system with 12 udma disks, and in practice it's been a nightmare. > Once you start using more than two interfaces the auto-tuning code in the > kernel ceases to work correctly, so you have to "tune up" each disk after > boot. Also, udma-66 has a cable length limit

RE: Many hdX-devices?

1999-07-13 Thread Tom Livingston
Niklas wrote: > How many ide disks is it possible to use under linux, and how many is it > "recommended" to use? Currently, it's possible to use three ide controllers at once for a limit of 6 interfaces. This is a limit in the ide kernel code. Apparently, though, expanding it should be easy. A

Re: Many hdX-devices?

1999-07-12 Thread MadHat
[EMAIL PROTECTED] wrote: > > Hi, > > I've been fooling around with raid-tools in combination with the promise > ultra/66 controller together with a couple of IBM desk-star 22 Gb disks. > > And I really like what I see. > > My main concern now is about how far these things will scale. > > When