The release of the latest firmware for the Dell™ PowerVault™ MD3000i iSCSI storage array has some enhancements that include support for RAID-6 and LUNs greater than 2 TB. Join this chat session to discuss these new features. Also answers to questions are provided for those who are new to the PowerVault MD3000i or are considering this array for deployment in their environment.

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Chat Transcript

Eric_Sloof_NTPRO.NL VMware Infrastructure Sets World Record for Web Server Performance
DELL-ScottH Drum roll…
DELL-ScottH Link?
virtualTodd It’s on the Vroom! blog
DELL-ScottH Hey Dennis. Use Action, Recent Room History to see Depping’s ramblings :-)
Eric_Sloof_NTPRO.NL http://phoenix.corporate-ir.net/phoenix.zhtml?c=193221&p=irol-newsarticle&id=1256993&highlight=
DELL-ScottH http://blogs.vmware.com/performance/2009/02/vmware-sets-performance-record-with-specweb2005-result.html
DELL-ScottH Hmmm, just looked at the details; bet if you run it on a Dell it would be faster :-)
virtualTodd I was trying to get the link; you guys win this one
DELL-ScottH Hello Koen
koen.vdvelde Hi Scott, nice to see you again
DELL-ScottH Just a bunch of VMware guys bragging right now
DELL-ScottH Oh wait, as we say in Texas, ain't bragging if it's the truth!
DELL-ScottH Hello dammmifino
dammmifino Hello
DELL-ScottH Hello James
jamesc Hi Scott
DELL-ScottH A few more minutes, and I'll kick it off
jamesc Okay, sounds good
DELL-ScottH Action, Recent Room History to see pre-chatter
DELL-ScottH Eric's link to his "pro"-fessional, DJ voice-over video is good
DELL-ScottH Hello Sharepoint and Doug
DELL-Doug Afternoon Scott
DELL-ScottH Hey Roger
SharePoint360 Good afternoon all
Dell-Roger Hi
DELL-ScottH Alright, I'm going to kick it off. Couple of reminders: Use Action, Recent Room History to catch up if you get kicked off or just joined
DELL-ScottH The chat is recorded and a transcript will be available tomorrow through the same link that got you here. So no need to copy URL links. Right-click a URL or you will exit the chat, and we will all laugh at you. :-) Throw out questions any time, and don't worry about interrupting...it is not rude in a chat
DELL-ScottH This week’s chat is one that I wanted to do a few weeks back, but we had a series of Microsoft chats going I couldn't interrupt
SharePoint360 @depping, thanks for the Twit regarding this...we have already implemented an MD3000i as our SAN for our ESX cluster, and I'm hoping this firmware update will address some of the issues we have been experiencing
DELL-ScottH Just before the holidays a new version of firmware for the MD3000 and MD3000i was released
wantmoore Be careful listening to Scott though, he bricked his MD3000i when trying to upgrade it :)
DELL-ScottH Lol, yes I did, but recovered nicely
DELL-ScottH The readme for what's new is here: http://ftp.us.dell.com/iscsi%20raid/dell_md3000i-iscsi-raid-cont_a06_r205009.txt
DELL-ScottH And here's the link to the files so you don't have to clicky-clicky all the links to get there: http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&servicetag=&systemid=pwv_md3000i&os=naa&osl=en
JasonPowell 2 TB LUN limit restriction removed!
wantmoore Shameless self promotion: http://letmegooglethatforyou.com/?q=md3000i+upgrade
DELL-ScottH Yes, brownie points for Jason!
JasonPowell /Me likes brownies
wantmoore Are brownie points good for discounts on 11g servers?
DELL-ScottH Biggest additions are greater than 2 TB LUNs and RAID 6 support. Nice Justin, first organic search in Google...nice. Collect them for all kinds of prizes :-)
DELL-ScottH As LUNs get larger and larger with the number of physical disks, RAID 6 is more important. I wrote a blog post on it: http://en.community.dell.com/blogs/systems_edge/archive/2009/02/16/defining-raid-6.aspx
wantmoore Do we get to laugh now? Or do we save them for the end?
DELL-ScottH Jason, Justin, have you guys tested a failed drive and seen how long it takes to rebuild?
wantmoore Uh, no. That sounds scary
DELL-ScottH Dang, was hoping you might have some real-world times; can you go pull a drive out of your production system for me? :-)
wantmoore Can you send me another array to back that data up on first? Preferably a PS5500 with 1 TB drives?
DELL-ScottH Hmmm, that would cost you brownie points; have you collected enough yet?
JasonPowell Lol
DavidSzp I had a drive fail in my new MD3000i
wantmoore Probably not...but I do have actual brownies
DavidSzp It wasn't in production, but it still took a couple of hours at least to failover
wantmoore Does that help?
DavidSzp 1 TB near-line SAS
DELL-ScottH Ah, some real life…so how big was the array and how long to rebuild?
SharePoint360 I have a few dormant drives left in my MD3000i if anyone wants to kick down some pizza $ for the time it will take to do the work ;)
DELL-ScottH Failover to the hot spare?
DavidSzp The array was fourteen 1 TB drives in RAID 5 with a hot spare
DELL-ScottH How much load?
DavidSzp It failed to the hot spare; not sure of exact timing but it was a couple of hours. Probably took three to four to rebuild at least, but I don't recall now. Practically no load. It was mostly empty at that point, just playing with it
DavidSzp Getting all the iSCSI connections hooked up and such
DELL-ScottH That's what I was hoping to learn today. I knew many of you had MD in test/production
DavidSzp It's in production now :-)
DavidSzp Also, it now has two hot spares
DELL-Doug Just remember the MD can’t gauge used or unused capacity from your host OS's point of view, so a rebuild is of the whole unit
DavidSzp I had a controller failure on an old SATA SCSI-attached array with a single controller
DELL-ScottH So I might be a little scared to have 30 drives in RAID-5 under load and worry about a second failure during rebuild
DavidSzp Recovered the data to the SAN and went live over Christmas :-)
DavidSzp Yeah, I'm a bit worried about my 13-drive RAID array, even with two hot spares
DELL-ScottH You like it so far?
DavidSzp But I'm also worried about performance, so I'm hesitant to go RAID-6 even though I can use one of my hot spares to do so
DavidSzp So far I love it
JasonPowell We're also doing the 13-drive RAID-5, "one giant LUN"
JOHNADCO I have test MD3000i's with run-able mapped VDs on them. You want me to pull a drive?
DavidSzp Faster than anything I had before, and I have pretty low load but I'm hitting it with three ESXi servers. I have 11 VMs running on one server, three to four on the other two
DELL-ScottH Is it read or write intensive? Did you see our performance paper on PERC RAID-5/6 comparisons? Link in a second for the others
DavidSzp I saw the paper; yes, wantmoore was nice enough to shoot me a link
DELL-ScottH www.delltechcenter.com/page/perc6+with+md1000+and+md1120+performance+analysis+report
DavidSzp Not sure what the load is; it's actually so tiny right now it's hard to measure :-)
DELL-ScottH Of course, that's on the PERC; need to convince the performance team to do it on an MD3000 and MD3000i
DavidSzp Mostly just random Windows and Linux VMs
depping Dropping off, going for a run...
DavidSzp I'm running the Exchange store on the SAN but not through ESXi yet
DavidSzp Just needed to get the store off local storage, will rebuild or P2V it soon
DELL-ScottH Yeah P2V rocks. When did all this IT stuff become so easy?
DavidSzp As far as the rest, I'll eventually have a low-usage SQL server on there and Exchange
DavidSzp vCenter Converter 4.0 rocks triple, too!
JasonPowell We need a SAN HQ application for the MD3000i
DavidSzp Linux conversions, no simultaneous-conversions limit even in free version; Windows Server 2008 support, more control over the process
JasonPowell Or tweak the SAN HQ application to read both EqualLogic and MD3000i :-)
DELL-ScottH Yes, agreed—didn't you blog about SAN HQ? Hmmm, since we own both you would think…
JasonPowell I tweeted about SAN HQ; haven't blogged it yet
DavidSzp I want SAN HQ for my MD3000i; I'm not lucky/rich enough to have an EqualLogic array
DELL-Doug Scott, performance team is working on the paper for MD3000 right now
DELL-ScottH Oh cool, when might it be out?
DavidSzp I'm also too lazy/busy to run the manual performance monitoring stuff
DELL-ScottH Which Doug is this?
DavidSzp My information so far comes from Veeam Monitor Free and the Performance tab in ESXi
DELL-Doug Farley
DELL-ScottH Oh come on, Todd made it all so easy before he left...let me find that link
DavidSzp Yeah I know. I have the link somewhere. I don't have too much running yet though, so I'll probably run it when I finish moving stuff over. I did just move my file server over to the SAN in a VM this past weekend
SharePoint360 Dropping off for change control meeting
DavidSzp Several hundred GB. It's our main office file server so it does get hit more than the other VMs generally
DELL-Doug I don’t have a date for when it will be out; they are trying to include more than just the RAID 5/6 discussion, detail about the benefits of firmware generation 2
DELL-ScottH Yes, this is great article from @virtualtodd: www.delltechcenter.com/page/md3000i+performance+monitoring
virtualTodd Thanks for the plug :)
DavidSzp I have a SQL server that's generally accessed by one person for our event/calendaring database, and I have a terminal server, Exchange 2007 (doing "nothing"), a print server, a DC, our antivirus console, an IRC bot on Linux...nothing too heavy use
DELL-ScottH Doug, ping me when that paper is close, and I'll get it a special place on the site and would love to have a chat dedicated to it with all the authors
DELL-Doug The updated MD3000i Tuning Guide is however now available @ http://support.dell.com/support/edocs/systems/md3000/en/ts/md3xarraytuninga01.pdf
DavidSzp My disk usage in the past hour or two (whatever ESXi's Performance tab gives me) for the heaviest-loaded server hasn't peaked above 10,000 kbps, and then only briefly
Corey Any chance we would be able to split arrays among multiple hosts? We don’t always want to dedicate 1 TB for logs, scratch, etc. The FC versions (LSI) of these arrays allow that, but the iSCSI-only ones do not, that I can tell
DELL-ScottH Thanks Doug, was not aware of that tuning guide
jamesc This may be off topic, but I am using my MD3000i with VMware ESX server. One of my VMs is a SQL 2000 server. I have 10 drives on the MD, RAID-5 and then two pairs of drives, RAID 1. On those two pairs I was planning on putting my SQL log and transaction files. Does anyone else do this, or would you just RAID-5 14 drives and call it a day?
DELL-Doug Corey, what are you trying to split? You should be able to share the MD3000i out to 16–32 hosts
DavidSzp Jamesc, I'd say that you're doing best practice, and I'm doing a bit RAID-5 because I don't think I need the extra performance and it makes things easier
DELL-ScottH Yes, whatever LUNs you carve out you can assign to different hosts
koen.vdvelde What I'm wondering about in this new firmware: If I don't need to go above the 2 GB limit and if I've no need (read, enough disks :-) for a RAID-6 configuration, is there any need/advantage to do the upgrade? That is, is it worth it to take the RISC and bother the users with a downtime of 30 minutes or more?
Corey I am not a fan of RAID-5 with that many spindles, generally. Four to eight drives is generally enough to saturate something else anyway
Corey Doug,
JOHNADCO I like lots of spindles on RAID-5
Corey When I create, say, a 1 TB array, of four +P drives I can only assign it to one host. I can create multiple arrays and share them with different hosts, but one array = one LUN so far
JOHNADCO I mean this is a preference thing for sure
DELL-ScottH I prefer many spindles as well
Corey I usually try and look at the application for the array and let that make the call for the number of spindles rather than a predetermined standard
DELL-Doug Koen, personally I find the performance of generation 2 firmware better than Gen 1; there was a lot of work done to enhance stability as well, and all in all I've been happier with the new firmware on our internal file server
JOHNADCO That does seem prudent. In testing, we went with 14 drives in the disk group, all VDs with things that group
DavidSzp I'm going to upgrade once I get backups made of my stuff :-)
DELL-ScottH Koen, just be sure to stop All I/O
DavidSzp I just downloaded Veeam Backup 3.0 today (released today), which can back up ESXi free
JOHNADCO Only eight VMs hitting, but some monsters in there I/O wise
DELL-Doug Corey, you can carve up a single disk group into multiple virtual disks, and each virtual disk can have a different owner
DELL-ScottH That was what bricked mine; I had about 12 active machines and I willy nilly tried the upgrade
DELL-Doug Scott, Rt*m!
DELL-ScottH Hello Henry and Ward
DELL-ScottH Yeah, I know, I know
DELL-Doug Big bold letters in the readme, please stop all I/O!
DELL-ScottH Bad admin! <-- slaps forehead
DELL-Doug I wrote them in big bold letters myself
wwolfram Hey Scott, my upgrade went well... (I stopped all I/O) :)
Corey Some RAID systems have a strong preference for even number power of two full-stripe writes. That means 2+ parity or 4+ parity, 8+ parity... Some don’t seem to care. I usually have to test the specific configuration to see what works better
DELL-ScottH After three days it self-recovered :-)
JOHNADCO Scott, you came back after three days and were like, dang, it's back up? :)
wwolfram Has anyone implemented RAID-6 with the new firmware yet?
koen.vdvelde I wouldn't dare to do that upgrade with a server attached to it, even if it was not indicated in the manual. Strange, I feel like I'm getting old :-) Thanks for the hint anyway :-)
Corey Doug, not so far. I can create the disk group, but the LUN is synonymous during the setup, and I never see a place to select a smaller LUN than the entire array. Am I just missing something?
DELL-ScottH Yeah, Corey, it's all about matching up the application requests I/O to the device I/O sizes. I think the link that Doug sent with array tuning should be a good read
DELL-ScottH Yeah, anyone doing RAID-6 in production yet?
DavidSzp Corey, you can make multiple LUNs per array
DELL-Doug Corey, the Modular Disk Storage Management GUI will let you carve and assign in that order; let me see if I can find the link on the wiki here
DavidSzp I've got one big array with something like six to seven LUNs not even taking it all up
DELL-ScottH @john, I wish! Was on with support for one full day
koen.vdvelde Scott, no kidding. How did you recover from that crash?
JOHNADCO I hear chirps of crickets on the RAID-6 in production question. :)
DavidSzp No RAID-6 here; wondering if I should do it or not after I upgrade
DELL-Doug I'm using RAID-6 here, but that’s just me
DavidSzp I was gung ho for RAID-6
wwolfram What performance are you seeing with RAID-6 compared to RX?
DavidSzp But wantmoore talked me down because of performance
JOHNADCO Is that a test MD3000i? Or true production, Doug?
Corey I agree completely. I will take a look at the document. For light loads it doesn't matter, but for heavy ones everything from the network MTU, TCP offload settings, NTFS cluster size, RAID I/O segment size, RAID cache block size, application I/O block size, I/O queue size, and so on, all can be important and should at least be understood if performance is important
DavidSzp I wonder what it's like to have a "test" SAN? I had to pull teeth just to buy a production one
jamesc Can an existing RAID-5 be upgraded to RAID-6, or does it have to be reformatted?
wantmoore I like it in theory, but we're storing lots of insanely large media files on it, and from what I’ve read, RAID-6 with large files is slower
DELL-Doug John, well we dogfood our storage here, so my group’s internal stuff is living or dying by such a system
JOHNADCO I like the RAID-6 idea well enough, just don't like the fact it has to "change" RAID levels on my production VDs
DELL-ScottH Yeah, I'd really like to see the performance document Doug is talking about, because the performance in RAID-6 is all about how it's implemented in the ASIC
wantmoore You can upgrade the array from RAID-5 to greater than RAID-6 on the fly
DELL-Doug We are doing snaps and volume copies and offloading to tape, etc., but the file store lives on the MD3000
wantmoore No SMcli even needed...do it right inside of MSDM
JOHNADCO Close enough, did you change the RAID level? Or copy to a RAID-6–based VD, Doug?
DELL-ScottH @wantmoore, yes, I'm looking at it on my MDSM utility right now
JOHNADCO Excuse my typing today. It has been awful today...senility setting in or something
Corey Does the new firmware allow for changing the disk segment/stripe size after implementation like the FC-native firmware does?
DELL-Doug John, this system was an original RAID-6, but we've done migrations in the past without a problem—just cuts into your performance
DELL-Doug Corey, yes, stripe changes are done through the CLI
JOHNADCO Thanks, still on the fence here
wwolfram Wantmoore, you convert a LUN or a disk goup from RAID-5 to greater than RAID-6?
Corey Thanks. Tech support had said it could not be done, and if it could it was not supported. They did not seem to know much about the CLI, only the GUI
JOHNADCO There is an option for it in the MD Storage Manager GUI
DELL-ScottH Ward, it's for the disk group
DELL-Doug Wwolfram, RAID is a function at the disk group level
koen.vdvelde Scott, what trick did support use to get your MD3000i back to life?
DELL-ScottH That's about all I had for today's chat...Gen 2 firmware, aka 07.35.22.60—just do it
wwolfram So, if I have a 7-disk disk group in RAID-5 and convert it to a 7-disk RAID-6, don’t I lose space in the disk group? Thus, if it is highly utilized, I might not be able to do it...am I missing something here?
JOHNADCO I have some general questions?
DELL-ScottH Well, I had to connect with the serial cable, then magic happened
jamesc Thanks everyone, very informative session (for me)
JOHNADCO About snapshots
DELL-Doug wwolfram, yes if you were using all the available space in a disk group in RAID-5, you would need to add capacity to the disk group to migrate to RAID-6
koen.vdvelde ...And your data was still there?
JOHNADCO Lol. Good question
DELL-ScottH We were able to determine that only one controller was borked, so I removed it, then upgraded the remaining controller ... then was able to reinsert the failed one and it magically rebuilt itself from the other
DELL-ScottH My data? Sadly, it was all bye bye
DELL-ScottH Or should I say Todd's data. You don't think I'd try this on mine first? :-)
JOHNADCO Ouch!
DELL-ScottH John, shoot on the snapshots
koen.vdvelde In that case, can you send me Todd's MD3000i for a while so I can do a test run for that firmware update as you advice me?
DELL-ScottH Ward (wwolfram) has experience there and some demos
DELL-ScottH If you are in the Austin area, come on in to the lab and play all you like!
wwolfram Yes, we do demonstrations via webcast if needed
DELL-ScottH Here's Ward’s demos. Link coming…
JOHNADCO So, I finally re-used some disabled snapshots. It was seemingly instantaneous. Is there any way to verify the snapshot without checking it with a host? We use them to make disk copies only for redundancy
Corey Do you have the documents available for the serial-port CLI (vxworks maybe?)
JOHNADCO It was so fast, I wondered if they worked was all
koen.vdvelde At least one thing I learned, next time I ask my boss for money for a new SAN, I'll have to ask for two: one for production and one for the case I have to do a firmware upgrade :-(
DELL-Doug Corey, use of the Serial Debug port is not needed for recovery
wwolfram Johnadco, from what I have found, verification at the application is what you want to do
DELL-ScottH Yes, you always need a test environment
Corey Just make sure all 8 TB are backed up. You can restore in just a few minutes if there is a problem right?
JOHNADCO I also had one run out of room and error my MD3000i. On that one do I just need to recreate? Should I increase the repository and then recreate, or should I start over with it from scratch?
DELL-ScottH Some storage demos from Ward and Todd: www.delltechcenter.com/page/storage+demos
DELL-Doug Or at least, even with Scott's error, you can still recover through the GUI and CLI without having to connect via the debug port
DELL-ScottH Yeah, I probably should have kept my mouth shut that I used the debug port, but any time I get a chance to muck in the inner workings I take it :-)
wwolfram Anyone take advantage of the greater than 2 TB LUN sizes in the new firmware?
JOHNADCO Anybody need LUNs bigger than 2 TB? :)
wantmoore We are
DELL-ScottH 640K is enough for anybody
wwolfram Wantmoore, what OS are you using?
JOHNADCO No kidding. I am thinking Windows will barf on the larger LUNs
Wantmoore Windows Server 2003: http://twitpic.com/12r8z and http://twitpic.com/12skib
JOHNADCO So what's your biggest VD/LUN?
wantmoore It's 11.1 TB usable, once formatted in Windows
DELL-ScottH How long did that second "formatting" picture take?
Corey It should be fine if you change the cluster size for the NTFS partition
wantmoore It was a quick format, so not long
wwolfram Any tricks to the file system you went through to support greater tan 2 TB? From what I understand, you must back up your regular NTFS file system, and then reformat it, etc.
wantmoore You can't do greater than 2 TB with MBR disks...you have to use GPT
wwolfram I understand you cannot migrate; all data is destroyed in the process? Thus, the required backup?
wantmoore Yeah, you can’t transition from MBR to greater than GPT. I had to wipe my array and reload all the data
wwolfram That is what I heard too, thanks.
DELL-ScottH Dang, 16 episodes of Seinfeld all lost
DELL-ScottH Seasons
wantmoore *grumbles*
JOHNADCO Is there any performance hit at all with a VD of that size? The 11.1 TB one that is?
wantmoore Actually, it wasn’t my data, so I didn’t do anything with it :) I told the dude to get his stuff off and put it back when I was done
wantmoore I don’t know. It’s not in a performance-necessary role, so I don’t even have data on it
JOHNADCO Interesting
wantmoore It’s just attached to a VM and serving files; big video archives essentially
DELL-Doug Umount/mnt/Md; resizefs/dev/lvm_lun/a 8000 GB; sleep; mount /dev/lvm_lun/a?
wantmoore Lvm++
JOHNADCO Sixteen seasons of, well, you know. :)
DELL-Doug John, please see the performance tuning paper on that very subject
DELL-ScottH I appreciate everyone being on the chat today. The transcript will be posted on this same link tomorrow. Feel free to continue chatting, and if you are reading this in the transcript, ask any questions by starting a thread at the bottom of the page. Special thanks to Doug for joining us today and helping out with some of the geekier/technical questions. Again feel free to stick around, just wanted to thank everyone before they left
Corey How about changing the disk sector size for the LUN to 4096 bytes instead of 512? Is there a way to do this on the MD3000i?
JOHNADCO The CLI maybe
DELL-Doug Corey, your stripe size is what you want to adjust
wwolfram Dell-doug, is the performance-tuning paper on the TechCenter site?
DELL-Doug Wwolfram, http://support.dell.com/manuals
wantmoore I think we changed the block size from within Windows, but just went with the largest choice that was available in MDSM
wantmoore I suspect you can adjust the actual sector size through SMcli
Corey Doug, sometimes it is, but for large transaction types of partitions, it seems that using 4K sectors reduces the overhead of mapping 8x that number of sectors into a cluster (assuming 4K clusters)
DavidSzp I'm glancing over the chat history; sorry had to take care of some tech support the last little while
tobyhenderson %%%%, got my time differences wrong. You're six hours behind the UK, not seven
Corey Doug,
DELL-Doug Corey, many HDD vendors are just now adopting true support for greater than 512 byte sectors; it takes time to adjust our products that use those drives accordingly
DELL-ScottH I just added that "Array Tuning Best Practices" to the Storage white paper section: www.delltechcenter.com/page/storage+whitepapers
DELL-Doug But the storage array does support cache block settings of 4K or 16K for your write and read cache needs
Corey Doug, also since the page size for paging in the segment off size is 4K, it seems to be only wasted overhead for the small sectors. I know Vista and 2008 finally added support for it, but I was wondering if it had been tested
Corey So does the array not re-map the 512-byte HD sector into a 4K logical?
DELL-Doug In effect, yes, but writes and reads are typically handled to align with your chosen segment and stripe sizes
Corey To me it goes back to tuning...it can be tough to keep up with an LTO-4 using compressible data since it exceeds 1 GB at times and I am just looking for all the efficiencies I can find. If I never want less than 4 KB of data in an I/O, then why keep track of them anyway
DELL-Doug You can of course work on smaller-than-a-stripe data sizes, but the impact is still impartial writes, assuming you’re talking RAID-5 or RAID-6. You're going to take a performance hit if you’re doing RMW all the time
Corey BTW, thanks very much for today’s chat. It was informative
DELL-Doug Glad to help
DELL-ScottH Thanks for joining
Corey I agree. I am trying to keep everything a full stripe where I can
DELL-ScottH Doug, very much appreciate you being on the chat today
DELL-Doug Certainly. Glad I was able to fit it into my afternoon
DELL-Doug I'll be on for a few more minutes, but brb in a minute
DELL-ScottH Next week's topic will be on OpenManage 5.5 Same time, same place, or watch for the tweets on @dellservergeek
koen.vdvelde Interesting subject. A pity I will not be able to join. But I'll certainly read the transcipt. So make it as interesting as today’s please! ;-) Thanks. CU!
DELL-ScottH I'll try. No promises
koen.vdvelde Hmmm, I'm sure you'll be able to make it! We believe in you! ;-)
JasonPowell What the?
DELL-ScottH Yeah, just needs more cowbell
DavidSzp More cowbell!
DELL-ScottH Ha, woke up the tweeters!
JasonPowell Gotta have more cowbell baby
DavidSzp That's a way to get me back to this tab :-)
JasonPowell That's effective for sure
virtualTodd I've got a fever!
wantmoore I can’t get performance data from SMcli :(
koen.vdvelde Oh no, they found the sounds...time to leave!
DELL-ScottH Lol, I learned a new trick to wake you guys up and get you back to this screen :-)
wantmoore Wow, that frowny face looks evil
JasonPowell Dang, wantmoore looks mean!
wantmoore This is davidszp
DavidSzp Lol
DELL-Doug Wantmore, did you ask it nicely?
JasonPowell Oh dear, our inner middle schooler is coming out
DavidSzp I wonder how many people peed their pants at the car horn?
DELL-ScottH Yes, please define "can't get performance data"
DELL-ScottH Oh my, didn't know there was a wookie sound! Yeah, the car horn was loud
wantmoore I'm running the command from Todd's article. It's just sitting there on "executing script"
DavidSzp I need to come back in here with an anonymous username :-)
DELL-Doug Wantmore, it stays on executing until the time period is done
DELL-ScottH Yes, because you are about to get kick banned :-)
DELL-Doug Writes to a file
DavidSzp That's kinda what I figured :-)
DavidSzp I'll stop
DELL-Doug It’s currently on demand sampling
DavidSzp Sorry, 24 years old is still young ;-)
wantmoore So, interval=5 and iterations=250 equates to how long of a wait?
DELL-Doug 250 x 5 second samples, so 20 odd minutes later
wantmoore Ah, its only been 10–15, I guess
DELL-Doug Wantmoore, please feel free to post any questions in the forum as well, I'll watch the comments on this article and respond back as well. I'm out otherwise—thanks for running these Scott
Corey Okay, now I feel silly. The LUN setting was always there and in a hurry I just assumed it was reporting the size of the LUN instead of allowing it to be changed. Doh! Thanks again Doug