On my opteron server http://smolt.fedoraproject.org/show?UUID=0fdd6288-6cb2-497e-a1a5-6459d9c8... the x86_64 kernel detects only two out of four SATA drives. I have the same problem with Fedora 7, I yum-ed to it to have the new apps, but I still run a FC6 kernel, which detects them just fine. I have two WD360GD-00FL (sda, sdb) - detected by F8- and two ST3300831AS (sdc,sdd) - _not_ detected by F8. This is the output of lspci on FC6: 00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3) 00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2) 00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2) 00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3) 00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2) 00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) 00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2) 00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3) 00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] 01:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE] 03:01.0 SCSI storage controller: Tekram Technology Co.,Ltd. TRM-S1040 (rev 01) 03:02.0 FireWire (IEEE 1394): Texas Instruments TSB12LV23 IEEE-1394 Controller 80:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3) 80:01.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3) 80:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 80:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 80:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3) 80:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 80:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) I have captured lspci -vvxxx on fc6,f7,f8 and dmesg on startup for fc6,f7 and f8, but since those are pretty big, I hesitate to post these here. Can anybody advise me how to proceed? Thanks, Willem Riede.