On Tue, Jan 27, 2004 at 10:01:17AM +0200, Atro Tossavainen wrote: > > Sorry about the crossposting. > > I wrote on the Yellow Dog Linux list when somebody asked about software > RAID on YDL about my experiences with it: > > >> The one really big gotcha is that the Macintosh partitioning scheme > >> can't tell the Linux kernel that certain partitions are to be > >> considered "Linux RAID autodetect" (as in x86 using the DOS partition > >> table type 0xfd). This means that you can't boot a Mac Linux system > >> directly from RAID because the kernel won't be able to autostart the > >> RAID devices. You have to work around this by creating an initial RAM > >> disk that uses the raidstart command to start your metadevices, then > >> swaps the initrd out of the way and proceeds to start the real system. > > to which Tim Seufert replied on the same list: > > > Hmmm. That would seem to be a lack in the Linux RAID code, since the > > Macintosh partition table has a vastly more flexible partition type > > field than DOS: instead of a single byte it's a string. It would mean > > breaking from the convention of using the "Apple_SVR2_UNIX" type for > > Linux partitions, but that really is just a convention as far as I know. > > Perhaps the PPC Linux developers and the Linux RAID developers should > get together on this and make some decisions so as to make it happen. Seems ok for me. Also, i guess that there are other partition types, like the amiga partitition table the pegasos boxes mostly use, which has a 32bit identifier for partition types. I guess it is the task of the RAID code to have some per partition type checking for this RAID autodetect magic. Friendly, Sven Luther - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
