Messages in this thread | | | Date | Thu, 10 Jul 2003 16:04:56 -0700 | From | Samuel Flory <> | Subject | Re: IDE/Promise 20276 FastTrack RAID Doesn't work in 2.4.21, patchattached to fix |
| |
Bartlomiej Zolnierkiewicz wrote:
>On Thu, 10 Jul 2003, Chad Kitching wrote: > > > >>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. >> >> > >Hmmm... you are right. Comment is still misleading in respect to RAID. > >ataraid driver is a _software_ RAID, just like Promise's binary driver. > >FastTracks have software RAID. There are few true hardware FastTrak >RAID controllers with I2O interface but we probe for them properly in >pdc202xx_new.c driver and don't use IDE driver for them. > > > >>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. >> >> > >It is quite opposite. > > > >>If this is true, may I suggest something more along the lines of: >> >>Ignore FastTrak BIOS and configure controller for RAID >>CONFIG_PDC202XX_FORCE >> 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. >> >> > >What about this: >
Much better, but
> >Ignore FastTrak BIOS >CONFIG_PDC202XX_FORCE > Forces the driver to use FastTrak controller even if it was disabled > by BIOS for Promise software RAID driver. > This one might confuse people thinking we mean the ataraid driver, and not the binary only driver.
Maybe: Forces the driver to use FastTrak controller even if it was disabled by BIOS for Promise's binary only software RAID driver.
> > Say Y if you do not use Promise's software RAID or > if you want to use ataraid driver. > > > Say N if you want to use Promise's binary module. > > > >>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. >> >> > >It has. According to Andre it is doable but big pain, >also Promise gives docs under NDA which makes it even harder. > >Please search lkml archive if you want know technical details. > > > >>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. >> >> > >Comments in Promise driver need fixing. > > >
-- Once you have their hardware. Never give it back. (The First Rule of Hardware Acquisition) Sam Flory <sflory@rackable.com>
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |