On Mon, 10 Jan 2011 10:18:58 -0800 Keith Lofstrom <[email protected]> dijo:
> Last night, I found the problem. The BIOS settings > for the SATA controller somehow got changed from AHCI > mode to Compatability mode. When I set the BIOS to AHCI, > hdparm -t went back to 79MB/sec. Back to 3 hours. > >Some windoze folks have problems with AHCI unless they load >the right Intel drivers. So the default is Compatability >mode, even if it makes the Ultrabay slow as hell. BTW, the >T60 Ultrabay actually has a PATA interface, and the swap tray >has a translator chip to SATA in it. Kludge! The newer >Thinkpads feed both SATA and PATA to the Ultrabay, IIRC. This sounds vaguely familiar. My T61 has a SATA II controller, but to ensure compatibility with drives of other types that a user might put in an Ultrabay adapter Lenovo decided to throttle it to 100 MB/s. From information I gathered on the Thinkpad e-list this was lame, but there you are. I have a fast 320 GB SATA II drive in the Thinkpad, and a slower 500 GB SATA II that I mounted in the Ultrabay. I use the Ultrabay drive for backups, and it's slow, although not nearly as slow as yours before you fixed the BIOS setting. It takes about an hour to use rdiff-backup to copy the 220 GB on the main drive; longer or shorter depending on how many new files there are to back up. _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
