DragonFlyBSD

When I was trying to create a DragonFly Live-USBstick using

dd if=/usr/release/dfly.img of=/dev/da0 bs=1m

It kept on failing with errors several times but got "unstuck" when I

pulled out the USB stick. Finally dd worked, but only after 5 tries.



Errors were of the following sort with many repeated messages:



umass0: <USB DISK 2.0, class 0/0, rev 2.00/4.11, addr 2> on uhub0

da0 at umass-sim0 bus 0 target 0 lun 0

da0: <USB DISK 2.0 0411> Removable Direct Access SCSI-0 device

da0: 1.000MB/s transfers

da0: 968MB (1982464 512 byte sectors: 64H 32S/T 968C)

vn0s1: cannot find label (no disk label)

contigmalloc_map: failed in index < 0 case!

umass0: BBB reset failed, TIMEOUT

umass0: BBB bulk-in clear stall failed, TIMEOUT

umass0: BBB bulk-out clear stall failed, TIMEOUT



(da0:umass-sim0:0:0:0): Synchronize cache failed, status == 0x4, scsi

status == 0x0

(da0:umass-sim0:0:0:0): lost device

(da0:umass-sim0:0:0:0): removing device entry

camq: devq send_queue still in use

camq: devq alloc_queue still in use

camq: devq send_queue still in use

camq: devq alloc_queue still in use

camq: devq send_queue still in use



umass0: detached

umass0: <USBest Technology USB Mass Storage Device, class 0/0, rev

2.00/1.00, addr 2> on uhub0

da0 at umass-sim0 bus 0 target 0 lun 0

da0: <USB.NU USB2FlashStorage 0.00> Removable Direct Access SCSI-2 device

da0: 1.000MB/s transfers

da0: 1928MB (3948544 512 byte sectors: 255H 63S/T 245C)

contigmalloc_map: failed in index < 0 case!

contigmalloc_map: failed in index < 0 case!

contigmalloc_map: failed in index < 0 case!

contigmalloc_map: failed in index < 0 case!

contigmalloc_map: failed in index < 0 case!



and more and more... until it just worked!