Yup, running jumbo frames, but even if you aren’t, it’s nowhere near a 25X speed difference.
The issue here is that somehow the connection to the S4 borks up the 8024. In one case it gummed up the switch such that you couldn’t even get to the HTTP configuration page, yet… a direct serial console connection revealed that the CPU was largely idle. Odd. Enterasys is coming in tomorrow so we can try and sort it out. -sc From: Harry Singh [mailto:hbo...@gmail.com] Sent: Wednesday, August 10, 2011 5:09 PM To: NT System Admin Issues Subject: Re: Dell PowerConnect & iSCSI That's odd. My first guess is Jumbo Frames...which I'm sure you and your team have addressed. I presume you're running IOMeter from inside a Windows VM? On Wed, Aug 10, 2011 at 4:45 PM, Steven M. Caesare <scaes...@caesare.com> wrote: At the moment just IOmeter. We were scratching our heads wondering why we were seeing ~9MB/sec on the SSD’s. The last test ran at 267MB/sec. Not sure if the 6224’s are affected… but flow control is broken on all firmware for the 8024’s. Dell has pulled it form the website and is urging customers to downgrade. -sc From: Harry Singh [mailto:hbo...@gmail.com] Sent: Wednesday, August 10, 2011 4:36 PM To: NT System Admin Issues Subject: Re: Dell PowerConnect & iSCSI I just implemented some powerconnect 6224's and a PS4000XV today actually and wondering what you're using to monitor read/write performance and just speed of the array in general ? SANHQ or IOMeter ? Thanks for the information Steven...those SSD drives must fly. On Wed, Aug 10, 2011 at 4:31 PM, Steven M. Caesare <scaes...@caesare.com> wrote: He was the lost 6th half-brother. And as an update: it appears that as Enterasys switches and Dell switches don’t play nicely together under some circumstances. Taking the Dell PowerConnect off their uplinks to the Enterasys S4’s improved thruput on the SSD-based EqualLogic’s we are testing by better than 25x … -sc From: Doug Hampshire [mailto:dhampsh...@gmail.com] Sent: Tuesday, August 09, 2011 9:42 AM To: NT System Admin Issues Subject: Re: Dell PowerConnect & iSCSI Isn't germane one of the Jackson 5? On Mon, Aug 8, 2011 at 6:08 PM, Steven M. Caesare <scaes...@caesare.com> wrote: Gotta give me points for at least trying to make it germane… -sc From: Eldridge, Dave [mailto:d...@parkviewmc.com] Sent: Monday, August 08, 2011 6:06 PM To: NT System Admin Issues Subject: RE: Dell PowerConnect & iSCSI That’s a stretch there Steve for not being way OT: :-) Wow do let us know how it goes. I don’t use power connect switches anymore but I have plenty of equallogics. Good luck. dave From: Steven M. Caesare [mailto:scaes...@caesare.com] Sent: Monday, August 08, 2011 3:44 PM To: NT System Admin Issues Subject: Dell PowerConnect & iSCSI Just to advise the list: Dell has pulled their 4.x.x.x versions of firmware for their 10Gb PowerConnect switches. There are known issues with flow control, and they can fail under high load after having been in service for extended periods of time. This is particularly triggered in iSCSI environments. In our case it was Dell’s own EqualLogic SAN’s that killed them for us. For some time the EqualLogic and PowerConnect groups disagreed on which firmware was “good”. We finally got them to talk and v3.1.4.16 has their blessing. Of course, the syntax was changed significantly between v3.x.x.x and 4.x.x.x, thus if you are already at 4 you cannot export your current configuration and re-import on the downgraded v3 chassis. You must manually reconfigure. Here’s pulling for a successful downgrade tonight… -sc PS- I claim this is NT related because we have NT boxen mounting iSCSI LUN’s via these switches :-) ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin This e-mail contains the thoughts and opinions of the sender and does not represent official Parkview Medical Center policy. This communication is intended only for the recipient(s) named above, may be confidential and/or legally privileged: and, must be treated as such in accordance with state and federal laws. If you are not the intended recipient, you are hereby notified that any use of this communication, or any of its contents, is prohibited. If you have received this communication in error, please return to sender and delete the message from your computer system.{token} ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin
