Lustre discuss - May 2006 - sgpdd-survey errors

Hi,
  I''m running the sgpdd-survey program.  That seems to want SCSI
drives, but I have IDE drives.  I was able to modify the script to work with
a partition on my IDE drives.  Has anyone else done this?

My disk is a Maxtor 6Y080L0.  The best results that I am seeing is 43 MB/s, 
which does not seem too high to me.  Also, I am getting errors, e.g.:

  total_size  1048576K rsz 1024 crg   256 thr   256 write
./sgpdd-survey: line 123:   497 Terminated              sgp_dd $inf $outf 
${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs bpt=$bpt 
time=1 2>${tmpf}_${i}_${j}
./sgpdd-survey: line 123:   560 Terminated              sgp_dd $inf $outf 
${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs bpt=$bpt 
time=1 2>${tmpf}_${i}_${j}
2 failed read   17.51 MB/s   256 x   0.07 =   17.09 MB/s
total_size  1048576K rsz 1024 crg   256 thr   512 write ./sgpdd-survey: line 
123:  4118 Terminated              sgp_dd $inf $outf 
${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs bpt=$bpt 
time=1 2>${tmpf}_${i}_${j}
./sgpdd-survey: line 123:  4269 Terminated              sgp_dd $inf $outf 
${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs bpt=$bpt 
time=1 2>${tmpf}_${i}_${j}
2 failed read   17.38 MB/s   256 x   0.07 =   17.09 MB/s

  Can anyone say why?  I am getting the same error on multiple
machines, so I don''t think that it is the disk itself.  Also, I
don''t get
any
errors on the first few iterations of the program.

  Thanks.

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RS RS wrote:

I am attempting to replicate your error, please see
  https://bugzilla.lustre.org/show_bug.cgi?id=9383  for instructions
on using spg_dd with raw devices, if you wish to run against IDE.
cliffw

> Hi,
>  I''m running the sgpdd-survey program.  That seems to want SCSI
> drives, but I have IDE drives.  I was able to modify the script to work 
> with
> a partition on my IDE drives.  Has anyone else done this?
> 
> My disk is a Maxtor 6Y080L0.  The best results that I am seeing is 43 
> MB/s, which does not seem too high to me.  Also, I am getting errors, e.g.:
> 
>  total_size  1048576K rsz 1024 crg   256 thr   256 write
> ./sgpdd-survey: line 123:   497 Terminated              sgp_dd $inf 
> $outf ${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs 
> bpt=$bpt time=1 2>${tmpf}_${i}_${j}
> ./sgpdd-survey: line 123:   560 Terminated              sgp_dd $inf 
> $outf ${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs 
> bpt=$bpt time=1 2>${tmpf}_${i}_${j}
> 2 failed read   17.51 MB/s   256 x   0.07 =   17.09 MB/s
> total_size  1048576K rsz 1024 crg   256 thr   512 write ./sgpdd-survey: 
> line 123:  4118 Terminated              sgp_dd $inf $outf 
> ${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs bpt=$bpt 
> time=1 2>${tmpf}_${i}_${j}
> ./sgpdd-survey: line 123:  4269 Terminated              sgp_dd $inf 
> $outf ${skip}=$((1024+j*blocks)) thr=$((thr/crg)) count=$count bs=$bs 
> bpt=$bpt time=1 2>${tmpf}_${i}_${j}
> 2 failed read   17.38 MB/s   256 x   0.07 =   17.09 MB/s
> 
>  Can anyone say why?  I am getting the same error on multiple
> machines, so I don''t think that it is the disk itself.  Also, I
don''t
> get any
> errors on the first few iterations of the program.
> 
>  Thanks.
> 
> _________________________________________________________________
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> http://search.msn.click-url.com/go/onm00200636ave/direct/01/
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