[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681

--- Comment #21 from rainer at ultra-secure.de ---
Still a problem on FreeBSD 12:

root at f12test:~ # dc3dd wipe=/dev/ada1

dc3dd 7.2.641 started at 2017-02-06 10:12:31 +0100
compiled options:
command line: dc3dd wipe=/dev/ada1
device size: 104857600 sectors (probed),   53,687,091,200 bytes
sector size: 512 bytes (probed)
  1153433600 bytes ( 1.1 G ) copied (  2% ),  131 s, 8.4 M/s                    

input results for pattern `00':
   2252800 sectors in

output results for device `/dev/ada1':
   2252800 sectors out

dc3dd aborted at 2017-02-06 10:14:42 +0100

root at f12test:~ # uname -a
FreeBSD f12test 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r313113: Fri Feb  3
01:47:24 UTC 2017     root at releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC
 amd64

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