Hiya, For my Adaptec 29160 card; I see a regression after 2.6.12 final. To be exact, these releases work for me: 2.6.12 2.6.12.1 These releases do not work for me: 2.6.12-mm1 2.6.12-mm2 2.6.12-git7 2.6.13-rc1 On a working kernel; I see the following: ACPI: PCI Interrupt Link [APC3] enabled at IRQ 18 ACPI: PCI Interrupt 0000:01:08.0[A] -> Link [APC3] -> GSI 18 (level, high) -> IRQ 18 scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36 <Adaptec 29160 Ultra160 SCSI adapter> aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs Vendor: FUJITSU Model: MAP3367NP Rev: 0106 Type: Direct-Access ANSI SCSI revision: 03 scsi0:A:0:0: Tagged Queuing enabled. Depth 253 target0:0:0: Beginning Domain Validation WIDTH IS 1 (scsi0:A:0): 6.600MB/s transfers (16bit) (scsi0:A:0): 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit) target0:0:0: Ending Domain Validation On a failing kernel, I see: ACPI: PCI Interrupt Link [APC3] enabled at IRQ 18 ACPI: PCI Interrupt 0000:01:08.0[A] -> Link [APC3] -> GSI 18 (level, high) -> IRQ 18 scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36 <Adaptec 29160 Ultra160 SCSI adapter> aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs target0:0:0: asynchronous Vendor: FUJITSU Model: MAP3367NP Rev: 0106 Type: Direct-Access ANSI SCSI revision: 03 scsi0:A:0:0: Tagged Queuing enabled. Depth 253 target0:0:0: Beginning Domain Validation target0:0:0: wide asynchronous (scsi0:A:0): refuses tagged commands. Performing non-tagged I/O target0:0:0: asynchronous [The PC hangs at this point] lspci output for the adapter: 0000:01:08.0 SCSI storage controller: Adaptec AIC-7892A U160/m (rev 02) Subsystem: Adaptec 29160 Ultra160 SCSI Controller Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 18 BIST result: 00 I/O ports at d800 [disabled] [size=256] Memory at db000000 (64-bit, non-prefetchable) [size=4K] Capabilities: [dc] Power Management version 2 Please let me know if there are specific patches I need to apply or revert to debug this. I have more drives on this controller; to be exact I have 2 U320-capable drives and one U160-capable drive on wide channel A; and 3 removable media units (CD-R, DVD, CD-ROM) on the 50-pin SCSI-bus. Thanks, Tony. (Please CC replies to me as I am not subscribed to LKML or linux-scsi) - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html