My USB-disk SCSI Disk product: External USB 3.0 vendor: TOSHIBA physical id: 0.0.0 bus info: scsi@6:0.0.0 logical name: /dev/sdb version: 0201 serial: D010A553 size: 465GiB (500GB) configuration: ansiversion=6 sectorsize=512 cannot be mounted. /dev/g2 exists, but udev does not generate /dev/sdb. This seems to be the bug discussed in http://www.spinics.net/lists/stable/msg15978.html. As described there, the bugs goes away if one reverts commit 66c28f97120e8a621afd5aa7a31c4b85c547d33d Author: Martin K. Petersen <martin.petersen@oracle.com> Date: Thu Jun 6 22:15:55 2013 -0400 [SCSI] sd: Update WRITE SAME heuristics
Duplicate of bug 60685