With kernel 2.6.23 on an Acer 7220 notebook using nVidia MCP67 SATA, hard drives are only detected after first booting from a CD. Boot from hard drive No drives detected Boot live CD Detected Boot CD to GRUB menu, Detected then warm-boot from hard drive Non-detect case: ahci 0000:00:09.0: version 2.3 ACPI: PCI Interrupt Link [LSI0] enabled at IRQ 23 ACPI: PCI Interrupt 0000:00:09.0[A] -> Link [LSI0] -> GSI 23 (level, low) -> IRQ 16 input: ImPS/2 Generic Wheel Mouse as /class/input/input2 ahci 0000:00:09.0: AHCI 0001.0100 32 slots 4 ports 3 Gbps 0xf impl IDE mode ahci 0000:00:09.0: flags: 64bit sntf led clo pmp pio slum part PCI: Setting latency timer of device 0000:00:09.0 to 64 scsi0 : ahci scsi1 : ahci scsi2 : ahci scsi3 : ahci ata1: SATA max UDMA/133 cmd 0xf8854100 ctl 0x00000000 bmdma 0x00000000 irq 221 ata2: SATA max UDMA/133 cmd 0xf8854180 ctl 0x00000000 bmdma 0x00000000 irq 221 ata3: SATA max UDMA/133 cmd 0xf8854200 ctl 0x00000000 bmdma 0x00000000 irq 221 ata4: SATA max UDMA/133 cmd 0xf8854280 ctl 0x00000000 bmdma 0x00000000 irq 221 ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata2: SATA link down (SStatus 0 SControl 300) ata3: SATA link down (SStatus 0 SControl 300) ata4: SATA link down (SStatus 0 SControl 300) Waiting for driver initialization But, if a LiveCD is used to boot or if a LiveCD was used before an hot reboot (without a power off), disks are correctly found : Loading ahci.ko ahci 0000:00:09.0: version 2.3 ACPI: PCI Interrupt Link [LSI0] enabled at IRQ 23 ACPI: PCI Interrupt 0000:00:09.0[A] -> Link [LSI0] -> GSI 23 (level, low) -> IRQ 16 input: ImPS/2 Generic Wheel Mouse as /class/input/input2 ahci 0000:00:09.0: AHCI 0001.0100 32 slots 4 ports 3 Gbps 0xf impl IDE mode ahci 0000:00:09.0: flags: 64bit sntf led clo pmp pio slum part PCI: Setting latency timer of device 0000:00:09.0 to 64 scsi0 : ahci scsi1 : ahci scsi2 : ahci scsi3 : ahci ata1: SATA max UDMA/133 cmd 0xf8854100 ctl 0x00000000 bmdma 0x00000000 irq 221 ata2: SATA max UDMA/133 cmd 0xf8854180 ctl 0x00000000 bmdma 0x00000000 irq 221 ata3: SATA max UDMA/133 cmd 0xf8854200 ctl 0x00000000 bmdma 0x00000000 irq 221 ata4: SATA max UDMA/133 cmd 0xf8854280 ctl 0x00000000 bmdma 0x00000000 irq 221 ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata1.00: ATA-7: Hitachi HTS541612J9SA00, SBDOC70P, max UDMA/100 ata1.00: 234441648 sectors, multi 16: LBA48 NCQ (depth 0/32) ata1.00: configured for UDMA/100 ata2: SATA link down (SStatus 0 SControl 300) ata3: SATA link down (SStatus 0 SControl 300) ata4: SATA link down (SStatus 0 SControl 300) https://bugzilla.redhat.com/show_bug.cgi?id=411171 - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html