<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>I haven't got to test this yet but i did notice that the yaboot that RedHat ships is patched to increase </span>LOAD_BUFFER_SIZE to 0x02000000, so i guess they hit the same problem, with their ramdisk beeing too large.</div><div><br></div><div>I'm stuck on testing net booting RHEL6.1 because of some weird issue on my POWER6 machine. Just throwing it our there, in case you guys have seen this before. It seems that the filename argument in my boot net command is ignored and replaced with bogus characters:</div><div class="MsoPlainText" style="margin-left:.5in">0 > <b>boot net:,yaboot,,</b></div><div class="MsoPlainText" style="margin-left:.5in"> </div>
<div class="MsoPlainText" style="margin-left:.5in">TFTP BOOT
---------------------------------------------------</div>
<div class="MsoPlainText" style="margin-left:.5in">Server
IP.....................192.168.205.226</div>
<div class="MsoPlainText" style="margin-left:.5in">Client
IP.....................192.168.205.254</div>
<div class="MsoPlainText" style="margin-left:.5in">Gateway
IP....................192.168.205.225</div>
<div class="MsoPlainText" style="margin-left:.5in">Subnet
Mask...................255.255.255.224</div>
<div class="MsoPlainText" style="margin-left:.5in"><b>( 1 ) Filename.................</b><b><span style="font-family:"Arial Unicode MS","sans-serif"">�����</span>Q</b><b><span style="font-family:"Arial Unicode MS","sans-serif"">�</span></b></div>
<div class="MsoPlainText" style="margin-left:.5in">TFTP Retries..................5 </div>
<div class="MsoPlainText" style="margin-left:.5in">Block
Size....................512 </div>
<div class="MsoPlainText" style="margin-left:.5in">1 </div>
<div class="MsoPlainText" style="margin-left:.5in">2 </div>
<div class="MsoPlainText" style="margin-left:.5in">3 </div>
<div class="MsoPlainText" style="margin-left: 0.5in;">
!EA017021 !</div><div class="MsoPlainText" style="margin-left: 0.5in;"><br></div><div class="MsoPlainText" style="margin-left: 0.5in;">And if i do a tcpdump on the tftp server i see this:</div><div class="MsoPlainText" style="margin-left: 0.5in;"> </div><div class="MsoPlainText" style="margin-left: 0.5in;">08:12:59.812664 IP (tos 0x0, ttl
255, id 9234, offset 0, flags [none], proto 17, length: 48)
192.168.205.254.41002 > 192.168.205.226.tftp: [no cksum] 20 <b>RRQ
"M-:^DM-@M-(M-MM-bM-;^B^_QM-^?" octet <br></b></div><div><br></div><div>So basically instead of requesting the file "yaboot" from the server, my machine requests "M-:^DM-@M-(M-MM-bM-;^B^_QM-^?". The firmware was updated to the latest version but still no change.</div><div><br></div><div>Anyway, just in case you've seen this before.</div><div><br></div><div>Thanks,</div><div>Radu</div><div><br></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><font face="Arial" size="2"><hr size="1"><b><span style="font-weight:bold;">From:</span></b> Tony Breeds <tony@bakeyournoodle.com><br><b><span style="font-weight: bold;">To:</span></b> Tai Pan <taipan_yh@yahoo.com><br><b><span style="font-weight: bold;">Cc:</span></b> "yaboot-users@lists.ozlabs.org" <yaboot-users@lists.ozlabs.org><br><b><span style="font-weight:
bold;">Sent:</span></b> Friday, July 22, 2011 4:01 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: booting RHEL6<br></font><br>On Thu, Jul 21, 2011 at 06:34:49AM -0700, Tai Pan wrote:<br>> Hello Tony,<br>> Indeed i didn't know that RHEL6 no longer supports POWER5. I guess that<br>> explains the second problem. I'll get a POWER6 machine and try it again.<br><br>More or less.<br> <br>> But for the first problem, i'm pretty sure i'll be able to reproduce it<br>> again, even on POWER6, as it doesn't really have anything to do with the<br>> arch. LOAD_BUFFER_SIZE is just not large enough. I didn't use the RHEL<br>> yaboot, i simply compiled it from the tar.gz on the yaboot page. Although<br>> RHEL6 uses an older yaboot, 1.3.14, in which LOAD_BUFFER_SIZE is even lower,<br>> if i remember correctly.<br><br>Yes you'll need to up the LOAD_BUFFER_SIZE to cover ~32MB (note without getting<br>tricky 32MB is the max you
can set it to).<br> <br>> I'll retry it on POWER6 with the default value and debugging as soon as i<br>> can.<br><br>You shoudl for the sake of simplicity also ensure your real-base is 12MB<br>(c00000) Other values may work, but 12MB is the best tested value.<br><br>Yours Tony<br><br><br></div></div></div></body></html>