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<DIV><FONT face=Arial>Hi, Andrew,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Thanks for the suggestion. I tried AOE but seemed to block
at connecttion timeout (while loading AOE image). Could you give me some hints?
Thanks a lot!</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Hi, all,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=新細明體 size=2><FONT face=Arial size=3>Except AOE, I really
want to know why there has a 15 seconds gap while iSCSI SAN boot Windows
XP. Is it normal? Is it possible that iPXE can SAN boot Windows XP
faster than local HDD vis iSCSI? Thanks!</FONT>
<DIV> </DIV>
<DIV><FONT face=Arial><FONT
size=3>Regards,<BR>Jerry</FONT><BR></FONT></DIV></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt 新細明體">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt 新細明體; font-color: black"><B>From:</B>
<A title=rulerof@gmail.com href="mailto:rulerof@gmail.com">Andrew Bobulsky</A>
</DIV>
<DIV style="FONT: 10pt 新細明體"><B>To:</B> <A title=jaspers.cheng@msa.hinet.net
href="mailto:jaspers.cheng@msa.hinet.net">jerrycheng-hinet</A> </DIV>
<DIV style="FONT: 10pt 新細明體"><B>Cc:</B> <A title=ipxe-devel@ipxe.org
href="mailto:ipxe-devel@ipxe.org>"><ipxe-devel@ipxe.org></A> </DIV>
<DIV style="FONT: 10pt 新細明體"><B>Sent:</B> Monday, May 23, 2011 11:29 AM</DIV>
<DIV style="FONT: 10pt 新細明體"><B>Subject:</B> Re: [ipxe-devel] Could iPXE boot
faster than local HDD.</DIV>
<DIV><BR></DIV>
<DIV>Hello Jerry,</DIV>
<DIV><BR></DIV>
<DIV>I can't speak to the anomaly you're seeing with iscsi, but you /may/ be
able to get a significant improvement on boot times by using iPXE's AoE
initiator instead, as AoE is a much lighter weight protocol. </DIV>
<DIV><BR></DIV>
<DIV>The Etherboot wiki has some fairly comprehensive AoE setup guides if
you'd like to try it out :)</DIV>
<DIV><BR></DIV>
<DIV>Cheers,</DIV>
<DIV>Andrew Bobulsky<BR><BR>On May 22, 2011, at 9:53 PM, "jerrycheng-hinet"
<<A
href="mailto:jaspers.cheng@msa.hinet.net">jaspers.cheng@msa.hinet.net</A>>
wrote:<BR><BR></DIV>
<DIV></DIV>
<BLOCKQUOTE type="cite">
<DIV>
<DIV><FONT face=Arial>Hi, all,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I tried to compare windows xp booting time by using
Microsoft bootvis. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>For the first glance, ipxe always slower than local
HDD than about 5 seconds. The bootvis showed the disk init time of local HDD
is about 2.2 seconds, and iPXE is about 15.5 seconds.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Than I tried to use wireshark to observe what happened
in iPXE's disk init time. From the following captured message, I found there
has a 15 seconds gap that iSCSI connection seemed to get into
trouble.<BR>
<BR>29408 15.646359 192.168.1.63 192.168.1.2 iSCSI SCSI:
Data Out LUN: 0x00 (Write(10) Request Data)
<BR>29409 15.646374 192.168.1.2 192.168.1.63 TCP iscsi-target
> 28906 [ACK] Seq=18548589 Ack=86633 Win=18760 Len=0 TSV=624524
TSER=577920<BR>29410 15.646818 192.168.1.2 192.168.1.63 iSCSI SCSI:
Response LUN: 0x00 (Write(10))
(Good)<BR>29411 15.647008 192.168.1.63 192.168.1.2 TCP 28906
> iscsi-target [ACK] Seq=86633 Ack=18548637 Win=8192 Len=0 TSV=577920
TSER=624524<BR>29412 17.443849 QuantaCo_9b:e4:69 Broadcast ARP Gratuitous
ARP for 192.168.1.63
(Request)<BR>29413 18.018077 QuantaCo_9b:e4:69 Broadcast ARP Who
has 192.168.1.2? Tell
192.168.1.63<BR>29414 18.018090 Giga-Byt_d6:86:bc QuantaCo_9b:e4:69 ARP 192.168.1.2
is at
1c:6f:65:d6:86:bc<BR>29415 18.018191 192.168.1.63 192.168.1.2 TCP cap
> iscsi-target [SYN] Seq=0 Win=65535 Len=0 MSS=1460
SACK_PERM=1<BR>29416 18.018212 192.168.1.2 192.168.1.63 TCP iscsi-target
> cap [ACK] Seq=1 Ack=2229090051 Win=65535
Len=0<BR>29417 18.018318 192.168.1.63 192.168.1.2 TCP cap
> iscsi-target [RST] Seq=2229090051 Win=0
Len=0<BR>29418 18.439915 QuantaCo_9b:e4:69 Broadcast ARP Gratuitous
ARP for 192.168.1.63
(Request)<BR>29419 19.439930 QuantaCo_9b:e4:69 Broadcast ARP Gratuitous
ARP for 192.168.1.63
(Request)<BR>29420 20.986835 192.168.1.63 192.168.1.2 TCP cap
> iscsi-target [SYN] Seq=0 Win=65535 Len=0 MSS=1460
SACK_PERM=1<BR>29421 20.986862 192.168.1.2 192.168.1.63 TCP [TCP
Previous segment lost] iscsi-target > cap [SYN, ACK] Seq=590980907 Ack=1
Win=14600 Len=0 MSS=1460
SACK_PERM=1<BR>29422 20.986966 192.168.1.63 192.168.1.2 TCP cap
> iscsi-target [ACK] Seq=1 Ack=590980908 Win=65535
Len=0<BR>29423 20.987203 192.168.1.63 192.168.1.2 iSCSI Login
Command<BR>29424 20.987222 192.168.1.2 192.168.1.63 TCP iscsi-target
> cap [ACK] Seq=590980908 Ack=197 Win=15544
Len=0<BR>29422 20.986966 192.168.1.63 192.168.1.2 TCP cap
> iscsi-target [ACK] Seq=1 Ack=590980908 Win=65535
Len=0<BR>29423 20.987203 192.168.1.63 192.168.1.2 iSCSI Login
Command<BR>29424 20.987222 192.168.1.2 192.168.1.63 TCP iscsi-target
> cap [ACK] Seq=590980908 Ack=197 Win=15544
Len=0<BR>29425 20.987376 192.168.1.2 192.168.1.63 iSCSI Login
Response
(Success)<BR>29426 20.987715 192.168.1.63 192.168.1.2 iSCSI Login
Command<BR>29427 20.987815 192.168.1.2 192.168.1.63 iSCSI Login
Response
(Success)<BR>29428 21.190002 192.168.1.2 192.168.1.63 iSCSI [TCP
Retransmission] Login Response
(Success)<BR>29429 21.190154 192.168.1.63 192.168.1.2 TCP cap
> iscsi-target [ACK] Seq=545 Ack=590981300 Win=65143
Len=0<BR>29430 30.987718 192.168.1.63 192.168.1.2 iSCSI SCSI:
Report LUNs LUN: 0x00
<BR>29431 30.987878 192.168.1.2 192.168.1.63 iSCSI SCSI:
Data In LUN: 0x00 (Report LUNs Response Data) SCSI: Response LUN: 0x00
(Report LUNs)
(Good)<BR>29432 30.988292 192.168.1.63 192.168.1.2 iSCSI SCSI:
Inquiry LUN: 0x00 </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Could you give me some advise about what could be
wrong? Is it possible that iPXE can boot faster than local HDD?
Thanks!</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Regards,<BR>Jerry<BR></FONT></DIV></DIV></BLOCKQUOTE>
<BLOCKQUOTE type="cite">
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