Eric, > Maybe the FPGA is discarding the taskfile writes once the HOB bit is > set? It wouldn't affect the READ NATIVE MAX ADDRESS EXT command being > issued since the only the command register matters for that, but it > would affect SET MAX ADDRESS EXT working properly. > > Without a device > 137GB to test with, and without errors on the > device, you might not see any odd behavior in normal usage. > > It's *really* unlikely the drive doesn't have a working taskfile. I am sorry. But I don't understand what a "working taskfile" means. I don't have CONFIG_IDE_TASK_IOCTL enabled if that means anything. The FPGA does nothing except decoding adresseses from the ARM cpu, controlling the A[2..0], CS[1..0], IOR, IOW lines of the HDD. In linux all I do is setting up some hw_regs_t struct (with hw.io_ports[]) according to my memory map and call ide_register_hw() ... So looks like I need to find out more about that taskfile stuff. The reason I started the this thread is that after working with Hitatchi and Toshiba HDDs in the same mannor we suddenly have problems with new Seagate drives. After the kernel reported problems when writing to the disk I used smartctl to look at the attributes: Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 100 253 006 0 3 Spin_Up_Time 0x0003 096 096 000 0 4 Start_Stop_Count 0x0032 100 100 020 21 5 Reallocated_Sector_Ct 0x0033 100 100 036 0 7 Seek_Error_Rate 0x000f 061 060 030 1368871 9 Power_On_Hours 0x0032 100 100 000 76 10 Spin_Retry_Count 0x0013 100 100 034 0 12 Power_Cycle_Count 0x0032 100 100 020 27 187 Unknown_Attribute 0x0032 100 100 000 0 189 Unknown_Attribute 0x003a 100 100 000 0 190 Temperature_Celsius 0x0022 069 025 045 538705951 192 Power-Off_Retract_Count 0x0032 100 100 000 25 193 Load_Cycle_Count 0x0032 100 100 000 363 194 Temperature_Celsius 0x0022 031 075 000 31 195 Hardware_ECC_Recovered 0x001a 078 066 000 23105720 197 Current_Pending_Sector 0x0012 100 100 000 0 198 Offline_Uncorrectable 0x0010 100 100 000 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 0 200 Multi_Zone_Error_Rate 0x0000 100 253 000 0 202 TA_Increase_Count 0x0032 100 253 000 0 And I am kind of concerned about Seek_Error_Rate, Temperature_Celsius and Hardware_ECC_Recovered ... So now I wonder if all the Seagate drives we have are broken or if this might be a problem with our hardware ... Thanks a million! Steven - 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
