Public bug reported: This defect is similar to Bug #195221 but has a different hardware configuration and slightly different symptoms. This is my first bug report so please mark this as a duplicate if appropriate.
I am using Hardy 8.04 (Release, not alpha) on a Commell LV-673NS with Pentium M. It installed fantastically and works great - with the exception of one piece of hardware. It is an IDE-SATA bridge card that plugs into the IDE port and provides 2 additional SATA ports (1 per IDE channel). For reference, this card is this item http://linitx.com/viewproduct.php?prodid=11623 and annoyingly, works very well under Windows XP, achieving a throughput of ~80Mb/s avg. with my Seagate Barracuda 7200.8 according to HDTach. Since this thoughput is physically limited by the disk I can only conclude that it is working at ATA100/133 in XP as it claims. When booting Ubuntu the computer hangs at the hardware detection step for ~1 minute as it struggles to detect the speed of the drive, before it settles (wrongly) on UDMA/33. From then on the disk performance is decidedly poor. Running sudo hdparm -tT /dev/sda gives the following: /dev/sda: Timing cached reads: 1322 MB in 2.00 seconds = 660.78 MB/sec Timing buffered disk reads: 88 MB in 3.06 seconds = 28.71 MB/sec >From googling around, I am led to believe that this is a current issue with libata. I have tried to use kernel 2.6.25.1 from https://edge.launchpad.net /~kernel-ppa/+archive, but although I can contact the repos there seem to be no packages there. As per the kernel team's policy I attach the requested output. ** Affects: ubuntu Importance: Undecided Status: New -- UDMA/33 Mode set due to problem detecting IDE speed https://bugs.launchpad.net/bugs/237220 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
