Tony Battersby wrote: > I am having a problem getting Linux to detect hot-plugged SATA disks on my > ICH7 AHCI controller (SuperMicro PDSME motherboard). On any SATA port that > already had a disk plugged in during BIOS POST, Linux will see the disk and > detect hot-plug and hot-unplug events just fine. On any SATA port that did > not have a disk plugged in during BIOS POST, Linux will not see a disk no > matter what. Here are the different sequences of events that I have tried: > > 1) boot with SATA disk plugged in > modprobe ahci: disk detected > unplug disk: disk deleted > plug in disk: disk detected > > 2) boot with SATA disk plugged in > unplug disk > modprobe ahci > plug in disk: disk detected > unplug disk: disk deleted > plug in disk: disk detected > unplug disk: disk deleted > plug in disk to any other SATA port -> not detected > plug in disk to the original SATA port -> disk detected > > 3) boot with SATA disk unplugged > plug in disk to any SATA port > modprobe ahci: not detected > grep ahci /proc/interrupts: 0 interrupts > > 4) boot with SATA disk unplugged > modprobe ahci > plug in disk to any SATA port: not detected > grep ahci /proc/interrupts: 0 interrupts > > 5) keep SATA disk plugged in during BIOS POST but unplug it before the > kernel boots > kernel hangs at "BIOS data check" > > I have tried both 2.6.24.7 and 2.6.27.8 with the same result. > > The BIOS is configured as follows: > Parallel ATA: [Enabled] > Serial ATA: [Enabled] > SATA Controller Mode: [Enhanced] > SATA RAID: [Disabled] > SATA AHCI: [Enabled] > > The root filesystem is on a parallel IDE disk using the legacy (non-libata) > piix driver. The BIOS could be tristating the ports. Does it work if you issue manual rescan (echo - - - > /sys/class/scsi_host/hostN/scan)? -- tejun -- 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
