Hello All ! I'm observing the problem with AMD SP5100 SATA controller. The problem appears as very low (2-3MB/s) write perfomance. Reading drops too, but not such dramatically (from 100Mb/s on other hardware to 50-60Mb/s on SP5100). This problem is checked on several kernels (2.6.x, 3.2.x, 3.4.x) including latest 3.5 and with all possible SATA BIOS settings. The hardware is Tyan S8005 m/b (latest BIOS v1.03), AMD X6 1045T, 8GB ECC memory and Hitachi HTS725050A7E630 drive. Moreover - I've checked 2 different identical boxes - it is 100% reproducable on both. So I'm asking for help for resolving this issue. The same HDD with another SATA controller (checked with Asus M2NPV and M5A78 m/b) shows normal write (150Mb/s-300Mb/s) perfomance. The SMART for HDD is good, contains no errors and passes the short test. The http://sfinxsoft.com/tyan URL contains dmesg (dmesg-bad file) and some screenshots. Can provide any additional info by request. It is looks like HDD fimrware bug, but Hitachi support refused to help saying that this is "third-party" problems and they will not support the end users ;( Thanks in advance -- Rus -- 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
