Hi all, I found issue similar to the one I am having in the archive on this list. I never found a resolution to the problem in the archive. I have a 4-port Sil 3124 64-bit PCI-X card in a Dell PowerEdge 750. It is connected to four SATA hard drives in an external drive bay that provides power and hotswap rails. There doesn't seem to be a problem running three drives, but as soon as I do something with a forth drive all hell breaks loose. The problem doesn't seem localized to a slot in the drive bay or a particular drive. The issue seems to only happen when I try to access a forth drive. I have also tried the card in another system (in a 32-bit slot) and I experience the same problem. /proc/interrupts CPU0 CPU1 0: 250 1 IO-APIC-edge timer 1: 8 0 IO-APIC-edge i8042 6: 2 0 IO-APIC-edge floppy 8: 1 0 IO-APIC-edge rtc 9: 1 0 IO-APIC-fasteoi acpi 12: 4 0 IO-APIC-edge i8042 14: 4002 0 IO-APIC-edge libata 15: 5192 0 IO-APIC-edge libata 16: 0 0 IO-APIC-fasteoi uhci_hcd:usb1 17: 0 0 IO-APIC-fasteoi uhci_hcd:usb2 18: 0 0 IO-APIC-fasteoi ehci_hcd:usb3 20: 0 0 IO-APIC-fasteoi libata 21: 0 0 IO-APIC-fasteoi __tmp1014268147 22: 8737 0 IO-APIC-fasteoi eth0 23: 1434 0 IO-APIC-fasteoi eth1 NMI: 0 0 LOC: 45044 36735 ERR: 0 MIS: 0 Jun 12 13:10:06 silo2 kernel: ata3: waiting for device to spin up (8 secs) Jun 12 13:10:15 silo2 kernel: ata3: soft resetting port Jun 12 13:10:15 silo2 kernel: ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300) Jun 12 13:10:15 silo2 kernel: ata3.00: ata_hpa_resize 1: sectors = 781422768, hpa_sectors = 781422768 Jun 12 13:10:15 silo2 kernel: ata3.00: ata_hpa_resize 1: sectors = 781422768, hpa_sectors = 781422768 Jun 12 13:10:15 silo2 kernel: ata3.00: configured for UDMA/100 Jun 12 13:10:15 silo2 kernel: ata3: EH complete Jun 12 13:10:15 silo2 kernel: SCSI device sde: 781422768 512-byte hdwr sectors (400088 MB) Jun 12 13:10:15 silo2 kernel: sde: Write Protect is off Jun 12 13:10:15 silo2 kernel: SCSI device sde: write cache: enabled, read cache: enabled, doesn't support DPO or FUA Jun 12 13:10:15 silo2 kernel: ata3.00: exception Emask 0x10 SAct 0x9ff SErr 0x80000 action 0x2 frozen Jun 12 13:10:15 silo2 kernel: ata3.00: (irq_stat 0x01100010, PHY RDY changed) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/08:00:00:1c:00/00:00:00:00:00/40 tag 0 cdb 0x0 data 4096 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/e0:08:08:1c:00/00:00:00:00:00/40 tag 1 cdb 0x0 data 114688 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/c8:10:38:19:00/00:00:00:00:00/40 tag 2 cdb 0x0 data 102400 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/10:18:e8:1c:00/00:00:00:00:00/40 tag 3 cdb 0x0 data 8192 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/20:20:f8:1c:00/00:00:00:00:00/40 tag 4 cdb 0x0 data 16384 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/c8:28:00:1a:00/00:00:00:00:00/40 tag 5 cdb 0x0 data 102400 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/38:30:c8:1a:00/00:00:00:00:00/40 tag 6 cdb 0x0 data 28672 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/00:38:00:1b:00/01:00:00:00:00/40 tag 7 cdb 0x0 data 131072 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/48:40:18:1d:00/00:00:00:00:00/40 tag 8 cdb 0x0 data 36864 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3.00: cmd 61/08:58:30:19:00/00:00:00:00:00/40 tag 11 cdb 0x0 data 4096 out Jun 12 13:10:15 silo2 kernel: res 50/00:00:af:90:93/00:00:2e:00:00/e0 Emask 0x10 (ATA bus error) Jun 12 13:10:15 silo2 kernel: ata3: waiting for device to spin up (8 secs) Jun 12 13:10:24 silo2 kernel: ata3: soft resetting port Jun 12 13:10:24 silo2 kernel: ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300) Jun 12 13:10:24 silo2 kernel: ata3.00: ata_hpa_resize 1: sectors = 781422768, hpa_sectors = 781422768 Jun 12 13:10:24 silo2 kernel: ata3.00: ata_hpa_resize 1: sectors = 781422768, hpa_sectors = 781422768 Jun 12 13:10:24 silo2 kernel: ata3.00: configured for UDMA/100 Jun 12 13:10:24 silo2 kernel: ata3: EH complete Jun 12 13:10:24 silo2 kernel: SCSI device sde: 781422768 512-byte hdwr sectors (400088 MB) - 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