Issue #2917 has been updated by swildner.
How was the stick written exactly? ---------------------------------------- Bug #2917: da8: reading primary partition table: error accessing offset 000000000000 for 512 http://bugs.dragonflybsd.org/issues/2917#change-12911 * Author: liweitianux * Status: New * Priority: Normal * Assignee: * Category: Driver * Target version: ---------------------------------------- Hello, Recently, I tried to install DragonFly BSD on my old ThinkPad X200 with both the 20160512-snapshot and 4.4.3-release USB image. However, DragonFly failed to mount root from the USB device. I enabled the verbose boot, and got the following error message: ---------------------------------------------------------------- (da8:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR (da8:umass-sim0:0:0:0): Retrying Command ... (da8:umass-sim0:0:0:0): error 5 (da8:umass-sim0:0:0:0): Retries Exhausted da8: reading primary partition table: error accessing offset 000000000000 for 512 Mounting root from ufs:da8s1a no disk named 'da8s1a' setrootbyname failed ffs_mountroot: can't find rootvp kthread 0xffffffe02050d700 syncer3 has exited Root mount failed: 6 ---------------------------------------------------------------- And there does not exist the 'da8s1a' device when listing: ---------------------------------------------------------------- mountroot> ? Possibly valid devices for root FS: "vn0" "vn1" "vn2" "vn3" "md0" "md0s0" "sg8" "sg0" "da8" "da0" "da0s1" "da0s2" "da0s5" "da0s6" "da0s7" "mapper/control" ---------------------------------------------------------------- I also tried to disable the "xhci" load, but the same issue remained. On the other hand, I tried to install FreeBSD (11-current) on that laptop and succeeded. And I can read the same USB device (with the DragonFly image dd'd into it) under FreeBSD (with the "geom_part_bsd64" module loaded). P.S.: I noticed there already existed a related bug report #2822 with this similar issue. But I think this bug may not related with the USB3.0, but very likely due to the CAM, and that bug stalls for a long time. Therefore I decide to open a new bug report. It's my pleasure to provide any further information if necessary. Best regards! Aly -- You have received this notification because you have either subscribed to it, or are involved in it. To change your notification preferences, please click here: http://bugs.dragonflybsd.org/my/account