Hi, On Thu, Jul 18, 2013 at 11:08 PM, Stefan /*St0fF*/ Hübner <st0ff.npl@xxxxxxxxxxxxxx> wrote: > Am 18.07.2013 22:37, schrieb Francis Moreau: >> Hello, >> >> Sorry if the question is stupid but I'm a rookie in md things, but I'd >> like to understand the big picture here. > > Probably a bit of good googling would have given your answers right away. > Not really. You think such because you might have missed the point of my question which is about how does coexists with bios raid. >> >> I've been told to use mdadm whenever possible even if my raid is >> handled by the bios (fake raid) which use the ddf metadata format. >> (unfortunately it seems that I can't desactive this fake raid in >> favour of linux soft raid). It's RAID1 BTW. > > There are two types of fakeraid that I know of. Intel and MegaRAID/LSI > emulation. Those are NOT handled by the BIOS, the boot process is > handled by the special op-rom integrated into the BIOS. Well what's the difference ? Of course a bios is not a piece of hardware with a dedicated cpu. So when I said it's handled by the bios, I obviously meant that there's a software stored in the firmware which is executed by my the processor and this soft can be configured through the bios. > After any > kernel is booted, all RAID processing shall be done by the respective > driver. And none use DDF afaik. Intel uses its own metadata format > (referred to as IMSM), LSI also uses its own format (those fakeraid > drives can be attached to f.e. a MegaRAID 9266 controller and your RAID > is then recognized - those 9266 f.e. can create DDF arrays). You probably have missed a lot more. Bye, -- Francis -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
