I left this problem for awhile, then finally got back to it. I upgraded the gentoo kernel to 3.6.11 and was partially successful: the 3TB drive mounted ok, but then had some serious trouble transferring files and I believe that linux force-unmounted it as a result. Then upgrading to 3.7.1 fixed the problem completely. Here is the dmesg output now: [ 4.787051] scsi 7:0:0:0: Direct-Access ST330006 51AS CC45 PQ: 0 ANSI: 0 [ 4.787176] sd 7:0:0:0: Attached scsi generic sg2 type 0 [ 4.787416] sd 7:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16). [ 4.787998] sd 7:0:0:0: [sdc] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB) [ 4.788405] sd 7:0:0:0: [sdc] Write Protect is off [ 4.788408] sd 7:0:0:0: [sdc] Mode Sense: 03 00 00 00 [ 4.788886] sd 7:0:0:0: [sdc] No Caching mode page present [ 4.788888] sd 7:0:0:0: [sdc] Assuming drive cache: write through [ 4.789246] sd 7:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16). [ 4.790420] sd 7:0:0:0: [sdc] No Caching mode page present [ 4.790424] sd 7:0:0:0: [sdc] Assuming drive cache: write through [ 4.841399] sdc: sdc1 [ 4.841883] sd 7:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16). [ 4.843331] sd 7:0:0:0: [sdc] No Caching mode page present [ 4.843334] sd 7:0:0:0: [sdc] Assuming drive cache: write through [ 4.843336] sd 7:0:0:0: [sdc] Attached SCSI disk Thanks for your help! On Wed, 2012-12-05 at 09:24 -0800, Sarah Sharp wrote: > On Tue, Dec 04, 2012 at 08:28:30PM -0500, Allan Dennis wrote: > > I hope you won't be annoyed by my question... here goes: > > It's my job to answer questions, so fire away. :) > > > I have 2TB and 3TB SATA drives, both connected to my Intense PC (Ivy > > Bridge tiny PC) on separate external drive enclosures on USB 3 cables. I > > have gentoo linux, and was running kernel 3.4.9 where both drives > > weren't recognized properly. Now I updated to 3.5.7 and the 2TB is good > > to go (yay!) but the 3TB guy is still giving me problems. Here is the > > dmesg output as I plugged in the 3TB (sdc) after the 2TB (sdb) was > > successful, with debug enabled in the kernel config. Is this a known > > issue? Can I help you figure out what's going wrong here by providing > > logs or whatnot? > > I can't see anything wrong on the xHCI side, so I suspect the problem > might be that the SCSI layer doesn't like some response the hard drive is > sending. I would suggest you take a usbmon trace, following the > directions here: > > http://lxr.linux.no/#linux/Documentation/usb/usbmon.txt > > Please hit 'reply-all' when you send the trace, since I've Cced the > linux-usb and usb-storage mailing lists. > > Sarah Sharp -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
