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* RE: IDE/Promise 20276 FastTrack RAID Doesn't work in 2.4.21, patchattached to fix
@ 2003-07-10 22:05 Chad Kitching
  2003-07-10 22:18 ` Samuel Flory
  2003-07-10 22:55 ` Bartlomiej Zolnierkiewicz
  0 siblings, 2 replies; 18+ messages in thread
From: Chad Kitching @ 2003-07-10 22:05 UTC (permalink / raw)
  To: Samuel Flory, Bartlomiej Zolnierkiewicz
  Cc: Steven Dake, linux-kernel, andre, frankt

I don't know.  That seemed to have changed the option from merely mystifying to down right confusing.  By that wording, does that feature override it into being a plain IDE controller, or an IDE RAID controller?  The new name seems to imply the former, while the mentions of ataraid suggest the latter.

Despite the grammatical errors, pdc202xx.c's comments perhaps describe it better.
* Linux kernel will misunderstand FastTrak ATA-RAID series as Ultra
* IDE Controller, UNLESS you enable "CONFIG_PDC202XX_FORCE"
* That's you can use FastTrak ATA-RAID controllers as IDE controllers.

If this is true, may I suggest something more along the lines of:

Ignore FastTrak BIOS and configure controller for RAID
  Forces the driver to use the ATA-RAID capabilities, overriding the
  BIOS configuration of the controller. Do not enable if you are
  using Promise's binary module.  This option is compatible with the 
  ataraid driver.

If the Linux driver has the same limitation in regards to using CD-ROM drives on the controller while it's in RAID mode as the Windows drivers do, it may be useful to mention the fact that the option is incompatible with CD-ROM drives attached to the controller.

Of course, maybe it means the complete opposite, and I'm reading everything wrong, in which case, there are some comments you may want to fix, too.

-----Original Message-----
From: Samuel Flory
Sent: July 10, 2003 4:11 PM
Subject: Re: IDE/Promise 20276 FastTrack RAID Doesn't work in 2.4.21,
patchattached to fix

Bartlomiej Zolnierkiewicz wrote:

>Do you have "Special FastTrak Feature" enabled?
Can we change the option to something that makes sense.  I get the 
feeling no one understands what it does at 1st glance.  This is the 2nd 
time I've seen a patch like this. 

^ permalink raw reply	[flat|nested] 18+ messages in thread
* Re: IDE/Promise 20276 FastTrack RAID Doesn't work in 2.4.21, patchattached to fix
@ 2003-07-12 18:36 Bartlomiej Zolnierkiewicz
  0 siblings, 0 replies; 18+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2003-07-12 18:36 UTC (permalink / raw)
  To: linux-kernel

On Sat, 12 Jul 2003, Ruth Ivimey-Cook wrote:

> On Saturday 12 Jul 2003 5:14 pm, Bartlomiej Zolnierkiewicz wrote:
> > I think you just need "pdc_ide=0,force" and "pdc_ide=0,noforce".
> > No need to complicate things.
> > Remember that ataraid is only software RAID driver and pdc202xx_new
> > is a chipset driver.
> I am not forgetting, but I don't like this idea of 'force' -- it instantly
> raises the question 'force what' and then you're in the quagmire again.

"force" means only use pdc202xx_old/new driver even if controller was
marked as disabled by BIOS (on-board or on-card).

> Better to tell the kernel what you want and let the kernel worry about how to
> make it happen.
> So the "pdc_ide2=jbod"  would be scanned and interpreted as a request to
> activate ('force') the drive into IDE mode and not enable any ataraid (jbod
> ==> just disks),
> while "pdc_ide3=promise" would let the drive state be, and make the kernel do
> a "modprobe promise-ft" (or whatever it's called) to load the rest of the
> driver, as is done for 'scsi-hostadapter'. [Would you ever have to force a
> promise chip into promise-raid mode?].
> Do you see what I mean?
> If you prefer, the string could be "pdc=ide2:ide, ide3:ataraid".
> > jbod/raid should be managed by ataraid driver not ide or pdc202xx_new.
> I was using jbod as just that, not as meaning raid-0 or similar. Perhaps I
> should have been clearer. So you've a choice of (just IDE), (RAID via
> ataraid) and (RAID via Promise)

Once again, I don't care unless ataraid is ported to 2.5.
We can discuss this then.

> > And seriously, I don't care unless somebody ports ataraid to 2.5.
> > [ Hint, hint! ;-) ]
> Hint understood and I'll look, but I'm no kernel guru.
> > > Should I think about coding this?
> >
> > No, think about porting ataraid and pdcraid to 2.5 first.
> pdcraid == ataraid module for PDC?? Haven't looked at the src yet.
> Regards,
> Ruth
> --
> Engineer, Author and Webweaver

^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2003-07-14 18:37 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-07-10 22:05 IDE/Promise 20276 FastTrack RAID Doesn't work in 2.4.21, patchattached to fix Chad Kitching
2003-07-10 22:18 ` Samuel Flory
2003-07-10 22:29   ` Steven Dake
2003-07-10 22:51     ` Samuel Flory
2003-07-10 23:13       ` Bartlomiej Zolnierkiewicz
2003-07-10 23:57         ` Steven Dake
2003-07-10 23:24       ` Steven Dake
2003-07-10 23:43         ` Bartlomiej Zolnierkiewicz
2003-07-10 23:54           ` Samuel Flory
2003-07-11  0:18             ` Bartlomiej Zolnierkiewicz
2003-07-10 22:55 ` Bartlomiej Zolnierkiewicz
2003-07-10 23:04   ` Samuel Flory
2003-07-12 15:11     ` Ruth Ivimey-Cook
2003-07-12 16:14       ` Bartlomiej Zolnierkiewicz
2003-07-12 17:01         ` Ruth Ivimey-Cook
2003-07-14 17:31           ` Samuel Flory
2003-07-14 18:49             ` Alan Cox
2003-07-12 18:36 Bartlomiej Zolnierkiewicz

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