Tejun Heo wrote: > 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)? > > No luck. I get: ata1: hard resetting link ata1: SATA link down (SStatus 0 SControl 0) ata1: EH complete And the drive isn't seen. Tony -- 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
