Re: "aborting sbp2 command" expected in kernel.org FireWire maybe

Stefan R:

> > > > "aborting sbp2 command" in dd of 2.6 of kernel.org
> > > > "aborting sbp2 command" in hdparm -tT or dd of 2.6.7 of Knoppix
> 3.6
> > > > "10.80 MB/sec" in hdparm -tT of 2.6.6 of Knoppix 3.4 (and 11.4
> MB/s in dd)
> > > > "24.10 MB/sec" in hdparm -tT of 2.4.27 of Knoppix 3.6 (and 24.6
> MB/s in dd)
> > > > 25.3 MB/s in dd when SCSI over something other than Linux
> FireWire.
> ...
> First thing to try is to switch serialization on for sbp2.
> See the sbp2 documentation at www.linux1394.org.

25 MB/s = 1.5 GB/min I see dd again achieve now, thank you. I tried
both the 2.6.7 of Knoppix 3.6 and my own 2.6.9-rc1-bk7 that I fetched
from kernel.org without patches.

http://www.linux1394.org/sbp2.php
tells me in a 2.6 Linux we mean for me to try:

$ modprobe -r sbp2
$ modprobe sbp2 serialize_io=1
$ dmesg | grep serial | tail -1
ieee1394: sbp2: Driver forced to serialize I/O (serialize_io = 1)
$

I remember Google had misled me to try what might be correct in 2.4
Linux:

$ sudo modprobe -r
$ sudo modprobe sbp2 sbp2_serialize_io=1
$ dmesg | grep serial | tail -1
sbp2: Unknown parameter 'sbp2_serialize_io'
$ # plug in drive
$

Pat LaVarre

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Received on Thu Sep 2 18:31:14 2004