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<H1>[Mageia-dev] Why is AHCI statically compiled into kernel?</H1>
<B>Thomas Backlund</B>
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TITLE="[Mageia-dev] Why is AHCI statically compiled into kernel?">tmb at mageia.org
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<I>Tue Mar 5 16:41:38 CET 2013</I>
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<PRE>R James skrev 5.3.2013 17:20:
><i> I remember when PATA (IDE) drivers were statically compiled into the
</I>><i> kernel, then we went to modular IDE which I liked because modprobe
</I>><i> ordering could be controlled. (When dealing with parity RAID, its nice
</I>><i> to have logical drive enumeration because SATA ports don't have UUID
</I>><i> labels.)
</I>><i>
</I>><i> But now it seems we've come full circle:
</I>><i>
</I>><i> [<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">root at localhost</A> ~]# grep SATA_AHCI /boot/config-3.8.1-desktop-1.mga3
</I>><i> CONFIG_SATA_AHCI=y
</I>><i> CONFIG_SATA_AHCI_PLATFORM=y
</I>><i>
</I>><i> Is there a compelling reason to do this (other than AHCI is popular)?
</I>><i>
</I>
It's needed to be able to boot new hw without need for initrd.
<A HREF="https://wiki.mageia.org/en/Feature:BootSansRamdisk">https://wiki.mageia.org/en/Feature:BootSansRamdisk</A>
><i> I'm putting together a home-brewed a file server using an old
</I>><i> motherboard plus a couple of add-in SATA controllers. With the Mageia
</I>><i> stock kernel, the enumeration looks like:
</I>><i>
</I>><i> sda = RAID disk 08 (ahci)
</I>><i> sdb = RAID disk 09 (ahci)
</I>><i> sdc = RAID disk 10 (ahci)
</I>><i> sdd = RAID disk 11 (ahci)
</I>><i> sde = Mageia OS (sata_nv) (1st port on mobo)
</I>><i> sdf = RAID disk 01 (sata_nv)
</I>><i> sdg = RAID disk 02 (sata_nv)
</I>><i> sdh = RAID disk 03 (sata_nv)
</I>><i> sdi = RAID disk 04 (sata_sil)
</I>><i> sdj = RAID disk 05 (sata_sil)
</I>><i> sdk = RAID disk 06 (sata_sil)
</I>><i> sdl = RAID disk 07 (sata_sil)
</I>><i>
</I>><i> Of course its no problem to re-compile the kernel with AHCI as a module
</I>><i> so I can modprobe it last. Just wondering why AHCI is now the exception
</I>><i> to modular sata...?
</I>><i>
</I>
--
Thomas
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