![]() I attempt to solve this problem by hacking the JMB363 option ROM to put the card into AHCI mode, with partial success. Other OSes (Mac OS X) do nothing and can’t use the card. Some OSes (Linux, drivers/pci/quirks.c) set a PCI configuration register to put the controller into AHCI+IDE mode after booting and use standard drivers. ![]() A JMicron-specific driver is available only for Windows. ![]() The problem with RAID mode is that standard AHCI drivers cannot be used. Motherboard BIOSes allow choosing the operating mode, but add-on cards are stuck in RAID mode. The chip supports operating in IDE, AHCI, and RAID controller modes. The JMicron JMB363 is a 2-port SATA + 1-port PATA controller chip often found embedded in motherboards and in low-cost add-on cards.
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