Re: Re: Re: RAID bus controller: Promise Technology, Inc. PDC20376 (FastTrak376)(rev02)
editor@postscript.port5.com wrote:
> I think the Promise RAID mode is a TOY RAID controller.
>
> What about Intel and Sil? This seems to be a problem with
> i386 also for all motherboards with a TOY RAID in the BIOS.
>
> Thanks for the links. The VIA RAID mode and Promise RAID
> mode have a BIOS ROM chip not a PGA chip so they aren't
> hardwired. The BIOS can set the disks up as RAID0, RAID1 or
> RAID0+1 or as individual disks. How can I tell the
> sata_promise I am using RAID mode not individual disks?
>
+++++++++++++++++++++++++
There is no such thing as a TOY_raid module. Use a bios_disk module.
The GNU Parted manual says:
3.1 5. The operating system may or may not use the BIOS to do normal
file system access (Windows usually does, Linux or BSD do not).
So Windows goes to the BIOS to find the disk. The disk c: in DOS for
example could be an array of disks like /dev/hde, /dev/hdf, /dev/sda and
/dev/sdb and the DOS user would never know. The sata_promise doesn't
know those disks are in an array so the module should ask the BIOS or
there should be a way to tell the sata_promise those disks are used in
an array not individually. (If the sata_promise wanted to do RAID.)
The bios_disk module asks the BIOS how the disks are configured and
doesn't care if that is an array or just individual disks because the
BIOS does all the work. That should be as good as a TOY_raid module.
Maybe someday the on-board RAID controllers will be good enough to use.
Then RAID support might be needed.
Does anybody use any of the RAID features on any motherboard for Linux?
editor@postscript.port5.com
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