It's not just with ACHI and not just after resume. I don't have ACHI turned on in my BIOS (tried both on and off) and I haven't just resumed... I stumbled across this looking for my own answer. I'm doing large file transfers between SATA drives on a AMD64.
Both drives: /dev/sda: Timing cached reads: 7228 MB in 2.00 seconds = 3615.06 MB/sec Timing buffered disk reads: 300 MB in 3.01 seconds = 99.83 MB/sec d...@dfox-asus:~$ sudo hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 7284 MB in 2.00 seconds = 3643.72 MB/sec Timing buffered disk reads: 318 MB in 3.01 seconds = 105.59 MB/sec But when I drag and drop a 4gig folder between the two I'm lucky to get file transfer speeds of 8 Mb/s. More likely it's in the 5 Mb/s range. I'm reading in other blogs this is an exclusive Ubuntu and perhaps a Ubuntu AMD64 problem as it's not happening under OpenSuSE or Windows 7 with the same servers. I just upgraded to 9.10 too. -- Slow sata disk with ahci driver after resume on Ubuntu Jaunty https://bugs.launchpad.net/bugs/371212 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
