Here is my setup
Dell 2950 Perc6/e
2 dell md1000s with 30x seagate 1tb drives raid6 512k chunk size

on open-e it is 1tb iscsi file io initialized target with wb

i've been running some benchmarks and here are my results

/dev/sdb1:
Timing cached reads: 3392 MB in 2.00 seconds = 1696.67 MB/sec
Timing buffered disk reads: 80 MB in 3.14 seconds = 25.45 MB/sec



<TABLE ALIGN=center BORDER=3 CELLPADDING=2 CELLSPACING=1>
<TR><TD COLSPAN=2 class="header"></TD>
<TD COLSPAN=6 class="header"><FONT SIZE=+2><B>Sequential Output</B></FONT></TD>
<TD COLSPAN=4 class="header"><FONT SIZE=+2><B>Sequential Input</B></FONT></TD>
<TD COLSPAN=2 ROWSPAN=2 class="header"><FONT SIZE=+2><B>Random<BR>Seeks</B></FONT></TD>
<TD COLSPAN=1 class="header"></TD>
<TD COLSPAN=6 class="header"><FONT SIZE=+2><B>Sequential Create</B></FONT></TD>
<TD COLSPAN=6 class="header"><FONT SIZE=+2><B>Random Create</B></FONT></TD>
</tr>
<TR><TD></TD><TD>Size:Chunk Size</TD><TD COLSPAN=2>Per Char</TD><TD COLSPAN=2>Block</TD><TD COLSPAN=2>Rewrite</TD><TD COLSPAN=2>Per Char</TD><TD COLSPAN=2>Block</TD><TD>Num Files</TD><TD COLSPAN=2>Create</TD><TD COLSPAN=2>Read</TD><TD COLSPAN=2>Delete</TD><TD COLSPAN=2>Create</TD><TD COLSPAN=2>Read</TD><TD COLSPAN=2>Delete</TD></TR><TR><TD COLSPAN=2></TD><TD class="ksec"><FONT SIZE=-2>K/sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>K/sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>K/sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>K/sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>K/sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD><TD class="ksec"><FONT SIZE=-2>/ sec</FONT></TD><TD class="ksec"><FONT SIZE=-2>% CPU</FONT></TD></TR>
<TR><TD class="rowheader"><FONT SIZE=+1><B>do246-322.krypt.com</B></FONT></TD><TD class="size">8000M</TD><TD>39062</TD><TD>91</TD><TD>83639</TD><TD>32</TD><TD>22921</TD><TD>10</TD><TD>19826</TD><TD>46</TD><TD>42551</TD><TD>6</TD><TD>2629.9</TD><TD>6</TD><TD>1024</TD><TD>24834</TD><TD>68</TD><TD>292277</TD><TD>99</TD><TD>4471</TD><TD>11</TD><TD>24385</TD><TD>68</TD><TD>96204</TD><TD>86</TD><TD>2363</TD><TD>7</TD></TR>
</TABLE>