yes....and u dont need drivers to install windows
just do ur setup and update the drivers later
Printable View
yes....and u dont need drivers to install windows
just do ur setup and update the drivers later
got it! Thanks T :)
stevero did u see the link that i post u?
oh boy :( here we go. I got win7 installed in record time. I get into windows and start shutting crap off like uac and set drives to never turn off, disabled indexing etc. As im about to install my chipset drivers and set up my lan the sucker reboots then after post there is no more LSI raid splash screen just says insert proper disk media etc reboot.. I shut down. reach my hand in the case and wiggle the card around to make sure its not wet from my h20 or something.. its dry and feels like its in there. I restart post fine then I get the following message:
http://i239.photobucket.com/albums/f...lsmith/msg.jpg
Heres my settings I saved in the raid utility before I installed os:
http://i239.photobucket.com/albums/f...raidscreen.jpg
when I installed the card I just removed the plastic plug from the sas header on the card and plugged in the sas / sata. ran sata cables plug 0 and 1 to my ssds and the sata power dongles frm my psu to the ssds. Im going to go back and start fresh and follow the guide step by step.
well you shouldn't be able to wiggle the card around. it should be secured firmly :) you experienced some sort of issue that made you lose power. that is the card informing you of the event. all you have to do is move forward.
breathe in through your nose...then out through your mouth. :)
i see you have the operating system on there. now install the mega raid control manager. i posted i the other thread. sorry had life to attend to.careful with your pcie lane overclock. sometimes the card does not like it and will shut itself off. until you get an operating system on there that is functioning normally you need to be at stock settings. once you have an operating system setup that you like, then you can image it onto another drive if you would like. then you can start playing with your motherboard settings such as pcie speed etc. no matter what board you have our hardware is going to operate differently. you have to learn what your specific configuration can handle. before you begin playing get it stock and running well. i image to another drive in case something happens. however, and i hate to jinx it, i have never lost an array on a lsi card. i had big probs with that and the arecas if there were messed up bsods or other :banana::banana::banana::banana: while overclocking. so proceed with caution. this isnt something that you should just run into full steam, like i tend too!! you may not need to do the excessive amount of tweaking that i and others do with these cards, as you are only running two devices it should be relatively straightforward. the stuff i do to my setup is to attempt to get super performance, and some things only give a marginal gain in performance. it may not be worth it to you to get one percent more performance.
no its just that there is so much weight on the back of my case with the gtx480 rad that sometimes the pci io gets warped and even if you secure the cards too tight they pull out of the slots partially. I think I was just guessing when I was in the raid setup. you really need to follow the pdf step by step. I went back and started from scratch. installing os now. In the meantime while all that was going on I managed to build a new computer.
http://www.xtremesystems.org/forums/...&postcount=123
i am pming you my msn if you need any more help i see you have another computer so...
Good morning Tilt,Quote:
Originally Posted by Tiltevros
I looked at your results, hard to compare yours with turds and mine because you are using a different proc and chip set.
Even so you are showing some good HDD scores - particularly in the HDD windows media center test.
Is this with the 9211 using the 20270 driver and your 7 (or 8?) x25m's?
ok after 18 hours of configuring and benching and installing triming and and and... the best results that i took from the LSI 9211 was... 350Mb/s at 4k seq. and 299Mb/s in random with a 7 array. i dont know what to do next.. im waiting for ideas until my new parts come here then.. we will start benching in a brand new 5520 chipset. a 72 lane motherboard with 100% compatibility in software and in hardware. keep advising because my brain stopped.
that result was live to computurd with 2.0.8.0 drivers and 7 HDD array (x25m G1 and G2). can u do me a favor stevero?? can u put the 9 lines in that xls of yours and mines so to make some grafs????
my rig is q9550 stock with 4GB ram with a rampage extreme. no overclocking at all.
I would have to relearn how to do it in excel - GullLars you there?Quote:
Originally Posted by Tiltevros
Now Results with some tunes on the controller (9211i8 with 7 x intels)
http://service.futuremark.com/compare?pcmv=259836
PCMarkSuite
PCMarkMemories 1
HDD - importing pictures to Windows Photo Gallery 182.48 MB/s
PCMark TV and Movies 2
HDD - Windows Media Center 241.08 MB/s
PCMark Gaming 1
Data decompression 983.19 MB/s
GPU gaming 45.48 FPS
PCMark Gaming 2
HDD - gaming 126.19 MB/s
PCMark Music 1
HDD - adding music to Windows Media Player 65.83 MB/s
PCMark Communications 2
HDD - Windows Defender 130.37 MB/s
PCMark Productivity 2
HDD - application loading 111.74 MB/s
Do you have the version of pcmark vantage that allows you to run the HDD bechmark.
If you have that version please run the HDD bench against your array, thanks!
Ok so here is Pcmark vantage HDD test for the LSI 9211-8i, Areca 1231ML-2G, LSI 9260-8i and intel ich10R (onboard raid).
The i7-965 and memory were set to 4.35 (132x33) and 1848 (8-8-8) woth pcie clock at 101.
The arrays used and (rather surpising) results for each test are as follows –
Ich10R – 6x acard 9010 R0 – 66175 pnts
9211-8i – 8xacardR0 – 60108
1231ML-2G – 8xacardR0 – 56210
9260-8i – 8xacardR0 – 47428
Ich10R – 1x Mtron Mobi 3000 (boot drive) – 12022.
Surprising that ich10 does so well – there might be something to that low latency argument.
For only 233 bucks – the 9211 beats both the 1231 and the 9260 in this test.
As you would hope, this test is very sensitive to storage capabilities - compare the single mtron mobi results to the others.
At some point I want to test s/w raid of some of the above combinations – an ich10R and the 9211 combination might score well.
Screen captures to follow, next up – pcmark vantage “pcmark suite” results.
http://img709.imageshack.us/img709/9...hddbenchoc.jpg
http://img69.imageshack.us/img69/841...parehddvan.jpg
http://img63.imageshack.us/img63/944...age1xmtron.jpg
Looks like the 9211i8 is not the controller to beat WR in pcmark with. But hey! It is a good cheap controller for all you're 4k needs :D
Here are some SSD benchmark numbers in the Norwegian Forums :)
http://www.diskusjon.no/index.php?sh...4&st=0&start=0
PCMark Vantage HDD Suite: HDD Score 120596, Raid0 4stk. X25-M G1 ICH10R ---> Woot !
The vantage pcmark suite results are as follows –
http://img215.imageshack.us/img215/4...summarypic.jpg
http://service.futuremark.com/compare?pcmv=259859
http://service.futuremark.com/compare?pcmv=259546
http://service.futuremark.com/compare?pcmv=259929
http://service.futuremark.com/compare?pcmv=259907
http://service.futuremark.com/compare?pcmv=259877
I don’t know how often the orb hall of fame is updated but if you search benchmark results for pcmark vantage the top eight looks like this –
http://img46.imageshack.us/img46/434...summarypic.jpg
http://service.futuremark.com/search...esolution=-100
click the above link -while NOT logged into vantage - you will get a more complete list top down list of all vantage scores made public -
Quote:
Originally Posted by SteveRo
real apps/games beg to differ vs pcmark/iometer :)
Good afternoon Mr Nizzen, could the 120596 perhaps be with MFT?Quote:
Originally Posted by Nizzen
Yes, I do plan on game loading crysisWH.Quote:
Originally Posted by NapalmV5
Would I get he same effect using a single mtron as boot but then loading/testing load times with the game loaded on the test array?
I may not have the space on the acards for both windows and the game.
New record for me in IOmeter i broke the 1660 for 64k files seq.
Now my record is
I do not know. I have to ask Anvil :)Quote:
Originally Posted by SteveRo
ok here u go
http://service.futuremark.com/compare?pcmv=260008
Tilt - excellent numbers.
Set up right - the 9211-8i with 7 or 8 x25-m's should score significantly higher in the HDD vantage test then what I have been able to do with the acards.
helpppppppp show me the way :):):)
So, the 9211-8i is ideal so long you provide it with the correct number of drives? What about the original Vertex's, I already have four of the 30's, if I grab myself a few more would the 9211 be a smarter purchase over the 9260-4i? Thanks for any insight into this questionQuote:
Originally Posted by SteveRo
i think that is something in windows that makes my array not working properly when i bench in IOmeter everything goes normal when i hit the vandage everything sux.. :(
if u saw my xls file that i sent u over yesterday u will be amazed about my results... even in small or big files... even in games my loads are fast.... even to the oracle that i use i broke 2-3 times my record..
in oracle ( REAL APPLICATION BENCHMARK ) im 2 times faster than a 16 array of cheetah sas drives...
Based on looking at the other high vantage scores that are available for review on the orb - I think pcmark vantage loves high throughput much more than high iops.
So how do you get that high throughput - you raid high throughput drives - the acards can only do ~175MB/s each, the x25-m's and vertex are much faster - what atleast 220MB/s or more.
If you had perfect scaling of 8 220MB/s drives - that would give you >1700MB/s throughput - look at Tilt's #120 post above - 1684MB/s - that kind of throughput should be huge for pcmark vantage.
You should have a huge pcmark HDD vantage disk score - I don't know why you're not seeing it.Quote:
Originally Posted by Tiltevros
If you're gonna buy today - get the 9211-8i, if you wait a couple months - f/w and s/w for both the 9211-8i and the 9260 should improve, at some point Areca is going to have to come out with something to counter LSI - when? who knows?Quote:
Originally Posted by SkOrPn
Don't go 9211-4i - turd says it is only pcie x4 - that might be problem down the road.
if i upgrade to xeons and to 5520 i would have bigger score?
I don't know enough about the 5520 but if the xeons are i7 D0 stepping you should see a huge increase depending on how your mobo chipset handes them.Quote:
Originally Posted by Tiltevros
yes a 16 core system with 6 or 12 gb of ram
Wow - yes that should be very fast - how many x16 pcie slots on the mobo?Quote:
Originally Posted by Tiltevros
4 pure x16 ver2
but i would see any diff with the array??? is it going to give that something that we need?????
If the mobo manufacturer has done a good job - that should be a very hot setup.Quote:
Originally Posted by Tiltevros
ok tomorrow my brand new TYAN S7025 (that a 72lane m/b) with dual xeons E5520 and 6x1 kingstone will come... i hope that i will see some diff.
of course it is.Quote:
Originally Posted by Nizzen
yes steve-o i would imagine yoiu could do a boot drive and test and get the correct results, or at least the only way to check would be to test...main thing is a percentage based comparison of the cards load times with the games.
I am having issues with the 9211 and my array. i cannot obtain high bandwidth numbers. i am limited to 1100 mb/s for some reason. i believe it is my motherboard i am not sure. i am working some various angles, but i am not convinced that i can solve it. i know the performance is there, i can see these guys getting it. i believe my problem is nf200 related. gah.
brake the raid setup and connect ur ssds on the ich1r do trim and gc test each of them and then setup again ur array (info from an IT guy)
One of the few advantages of the acards that I didn't realize when I got them - no usage degradation and easy reset. Easy reset just by removing power.Quote:
Originally Posted by Tiltevros
Are you seeing numbers like this, better or worse -Quote:
Originally Posted by Computurd
http://img690.imageshack.us/img690/7813/58652639.jpg
Quote:
Originally Posted by Nizzen
No it's not, it is ICH10R and the Intel G1's.Quote:
Originally Posted by Computurd
The only tweak is a particular stripe size.
The forum is down so I can't check the scores for the other stripe sizes.
yes but they r not bootable :( that is the reason why i dont have acardsQuote:
Originally Posted by SteveRo
with ICH9R and 4 intel G1's with stripe size of 128 256 the maximum result was 70k.... not even close to 120k....Quote:
Originally Posted by Anvil
Tiltevros,
You'll have to try lower stripe sizes ;)
@ Anvil. Have you tried increasing spare area size by making a smaller partition? Intel are saying that iops go up considerably as the free area is increased.
Check out this IDF 2009 presentation (13.30)
@audienceofone
No, not yet, but it's on my list of things to try :)
I was thinking of using 3-4 G2 160GB with 40GB spare area each.
Hopefully I'll be able to do the tests this week.
in 9211 with 7 intels G1 and G2 im using 64k stripe size i cant change it.. and even with this stripe size and its low if u consider that they are 7 of them im still getting low scores...
full benchmark suite with PCmark Vantage
http://service.futuremark.com/compare?pcmv=260172
I boot from acards 9010's all the time.Quote:
Originally Posted by Tiltevros
All of my pcmark vantage scores that I have posted in this thread - 1231ML, 9211, 9260 and ich10r have all been with the acards as the boot array.
Acards look like any other hard disk except usually much smaller.
sorry stevero i didnt know that i thought that acard are something like i-Ram's. ok any ideas what should we do with 9211?? any thoughts?? any ideas???
Your HDD score is good, particularly your windows vista start score - but I still say a 9211/7xX25mR0 should be way faster than what you are seeing.Quote:
Originally Posted by Tiltevros
I wonder if other devices might be conflicting.Quote:
Originally Posted by Tiltevros
For example - in my case - I wonder if quad SLI affects the start time score (my start time score is very low).
There might by competition between video cards and raid controller for pcie lanes and/or b/w.
There might be a irq conflict
Did you check the event log for anything unusual?
I've opted for a quote on the 9211-8i KIT on one of the webstores in Norway.
If the price is right I might order one.
A 64KB stripe size should be fine in most cases so I guess a new firmware could fix things.
I use 8-16KB stripe sizes on the 9260-8i for my VM's.
Tiltevros,
Have you tried it on other motherboards?
Tyan S7025 is coming today but my CPUS will come tomorrow so... i will try to setup as soon its possible to make some results... do u think that we will see any difference?
I've just rebuilt using a 70GB partition on a G2 160GB drive and there is a modest benchmark increase using AS Benchmark. Modest, but enough I think for top spot on your forum? ;)Quote:
Originally Posted by Anvil
AS SSD Benchmark 1.2.3577.40358
------------------------------
Name: INTEL SSDSA2M160G2GC ATA Device
Firmware: 2CV102HD
Interface: IDE
Size: 149.05 GB
Date: 28/12/2009 13:34:20
------------------------------
Sequential:
------------------------------
Read: 255.64 MB/s
Write: 105.06 MB/s
------------------------------
4K:
------------------------------
Read: 21.69 MB/s
Write: 52.24 MB/s
------------------------------
4K-64Threads:
------------------------------
Read: 158.81 MB/s
Write: 65.58 MB/s
------------------------------
Access Times:
------------------------------
Read: 0.057 ms
Write: 0.084 ms
------------------------------
Score:
------------------------------
Read: 206
Write: 128
Total: 441
------------------------------
What's the best raided throughout for any 8 drives on any controller (areca, LSI, HP, ich, ...).Quote:
Originally Posted by audienceofone
I think highest throughput would also contribute greatly to the highest pcmark vantage score.
Which wins - x25m's, vertex, vertex Turbo or if someone has deep pockets - x25-e's?
I would think the e's but at a heavy cost - ~3K$?
ok here is mine comment plz so i can figger out what i can do more
It looks like your drives are very degraded. You need to secure erase.
I tried 8 M's on the 9260-8i and throughput was ~2100MB/s, iops wise it didn't make any difference.
(I used the old firmware for the 9260-8i, the firmware dated oct-23 is clearly an improvement so iops wise it should be better than the old one)
Performance wise there is only one imho, the X25-E but it won't help much if the controller is holdning it down.
I've got 2 of them, one in a webserver and the other one is my boot drive.
The X25-E is an exceptional SSD, but I'll wait for the next generation (Lyndonville), it should be cheaper (per GB) and faster and will come in 100/200/400GB sizes.
The current Indilinx controller just isn't in the same league as the Intel controller, SandForce 1500 is looking like one to watch out for though.
@audienceofone
Hmmm, you've made me rethink my schedule :)
Your result is definitely an improvement, if it wasn't for the X25-E's you'd be on top of the list.
I can tell you one thing, Im not replacing my Vertexs until SATA 6Gb/s SSD's become avail, lol. I wonder if those will be considered Generation 3 drives, or if Gen 3 will still be sata 2?
@ Computurd: Thanks for the info, Biker directed me to his compatibility list but it did not show my mobo on it so I told him I will just give it a try and report back. Now to figure out which card I want, that is the tough part. The featureless state of 9211 is very close to a deal breaker for me, they should have at least given us the options of stripe sizes, if even only a few selections, similar to the options of a mobo, imo. jeez lol
Should SLC & MLC not be in different catergories? :p:If so no contest.:cool: I'm just under double the OCZ Vertex 250gb score of 222.Quote:
Originally Posted by Anvil
TBH if I needed the space I would not have bothered to try and squeeze out a bit more speed, but I can easily manage with 70GB and plus it really helps reduce wear on the nand.
@ SteveRo, sorry don't mean to highjack your thread......maybe it helps to put a bit of context to the speeds you guys are getting. :p:
EDIT: @ Anvil. Your score of 564 using 2 Kingston V40gb in raid 0 on a ICH10R is quite impressive!!
@audienceofone
Is the AS SSD score on your system drive?
Yes. Win 7 AHCI driver. ICH9Quote:
Originally Posted by Anvil
@ audienceofone if u have read at earlier posts u will see that we have problems atleast i have problems in Vandage :S in IOmeter i get 1680+ MB/s and in Vandage i get very low scores... the problem is that the LSI 9211 gives diff. results in any benchmark. HDD tune max speed 850MB/s, Everest ultimate 789MB/s, IOmeter 1686MB/s, HD tach 450MB/s.... we would like u all to share ur knowledge and help us understand if there is a wrong move that we make, if we have to consider something else or even the controller is a turd... :S sorry for speaking in this way but i really dont know what else i have to think or do!
@ Tiltevros. If you are getting big differences between different benchmarks I would not be so worried. That is more to do with the benchmarks programs than anything else. Try a fresh format as One_Hertz suggested. At least then you can take out degradation from the equation.
I wish I could help but my knowledge is very limited and there are ppl on this forum with considerably more knowledge who I'm sure will help if they can. I tried playing with a raid card and ssd's but I dumped it as soon as I realised that outside of benchmarks it gave me nothing in return. Now I like running a slimed down system. Less to go wrong, much cheaper, less power and no perceivable performance loss.
I don't do any tweaks apart from:
Superftech - disabled.
Defrag - disabled.
System restore - disabled.
File indexing - disabled.
It has been mentioned before in this thread but the 9211 does not do well with large files. The results differ a lot because different benchmarks use different sized blocks to make their measurements.Quote:
Originally Posted by Tiltevros
Your X25-Ms are also degraded hence the high access times. You need to run HDDErase on all of them (3.3 I think).
If you still have the same setup going, you mind running ATTO and posting it?Quote:
Originally Posted by Tiltevros
+1 on the secure erase.
I agree with one-hertz - this doesn't look right - I assume this is 9211 and 7 or 8 x25m's?Quote:
Originally Posted by Tiltevros
i cant get hdderase working does anyone here have an iso file that work?? i took off the raid connect the drives to ich9r IDE compatible but my iso doesnt boot...... help guys
you have this ver? http://www.iishacks.com/index.php/20...ate-drive-ssd/Quote:
Originally Posted by Tiltevros
yes set to native ide. reboot and set 1st hdd as dvd drive. it should work. You can also do sanitary erase method with the win7 dvd. lemme know
also make sure to anable acpi 2: go into BIOS > Power Menu and make sure ACPI 2.0 support is enabled and Suspend Mode is set to S1 (POS).
can u plz tell me the steps one over the time?
1rst i download the file from the web site
2nd i c/p (unrar first) in the USB
3rd config my bios
4th boot from the usb???
im doing it too.
DO you have a the usb key already set for boot? You need to format it using this method then copy the hdd erase files to the key once its been set up for usb boot disk. go here: http://www.ocztechnologyforum.com/fo...00&postcount=1
I also found out how to flash to latest FW on these in DOS using usb boot device.
it doesnt work... it doesnt see the keydrive at all...
and you set the 1st boot device in mobo bios to the usb key and disabled everything else? You also browsed to the dos file in the HP usb boot utility when you formated the usb key?Quote:
Originally Posted by Tiltevros
you can't burn the iso on a cd and boot from that or its usb key only?
try this one
http://h20000.www2.hp.com/bizsupport...reg_R1002_USEN
guid me plz tell me the steps one by one
T we can't crap derail this thread any more out of respect for C.T. who started the thread. We are getting way off course here. Capt. Picard would crap if Riker was making Worf help Geordi do a level one diagnostic during a Romulen attack on the Enterprise. Just go back to this thread and follow it step by step until you have the usb boot disk formatted as a boot dos disk. If you are really out of ideas screw HD erase and read up on using santiary erase wiper by booting from the win7 disk and go to repair. I am sorry if I cant take much time on this but I am in the process of draining my watercooling loop.Quote:
Originally Posted by Tiltevros
http://www.ocztechnologyforum.com/fo...00&postcount=1
Steve - still no results for game loading times?
Yes, by the end of the week.Quote:
Originally Posted by One_Hertz
Planning to use an mtron as boot drive and load the game/test level load times on the controller/8xacards - this ok?
That's perfect.Quote:
Originally Posted by SteveRo
i think that should be fine. that will be the most anticipated results by far :) you have been dong an awesome job with these controllers. i see that your now listed very high in the pcmark vantage TOP 5!! nice result!:clap: did you try the MSM for the 9260-8i yet?
i appreciate your time very much as i know the other guys do.
here are some results from something i compiled on the 9211 boot array.
we must take these results with a grain of salt, as i am having issues with 'something' that is limiting me from max throughput.
http://i517.photobucket.com/albums/u...bootsarray.png
http://i517.photobucket.com/albums/u...tssarray-1.png
Anyone know the cheat code to unlock levels in crysisWHD off the top of their heads? - I will look it up.
i just load them by hosting up a multiplayer game. all the levels are there.
Supermicro has MB's with LSISAS2008 onboard.Quote:
Originally Posted by Tiltevros
http://www.supermicro.com/SAS2/SAS2.cfm
I imagine this would help latency? I wish they had a board with (4)2.0 X16 slots and onboard controller... The X8DTG-QF has (4) X16 lanes but no SAS 2.0...
With the s7025, you get another onboard controller to add to the testing (LSI SAS1068E - albeit 3Gb/s-8 port), might be neat to see how this stacks up to the ICH10R, etc....
Curious to see the results from your new setup.
@steve-ro--running stripe size of 16k with the 9260 i have been able to match the load speeds of the 9211 with crysis. i am installing l4d now to test as well.
i am going to do some targeted testing with 64k and 128 k as well. the 1mb stripe is probably best for the benchmarks, but not game loading.
Well, I got the quote on the 9211 today, is the 9211-8i KIT worth ~$400 ex.vat, (half the price of the 9260-8i KIT in Norway)
Computurd,
Smaller stripe sizes almost always wins in real life performance.
ok im back to the game :) dual xeons are on :D
Figured it out - just restored a game profile from when I had completed the game sometime back.Quote:
Originally Posted by Computurd
I have already completed the CrysisWH bench using the 1MB strip!Quote:
Originally Posted by Computurd
@steve-o...gah i feel for ya! i just found out what the problem may have been with the 9211.. will have to check it out later. i am getting testing fatigue :nuts::wth:
so i am going to play around some to rest before i put it back on to check. i am sorry to spring the 16k thingy on ya after you already pounded away at it. if you dont get around to it that's cool.:)
for reference someone asked me what the idea behind my game loads testing is. basically i reboot, let the system set for about 30 seconds, then load game.
then reboot, and repeat. that is 1 nonconsecutive and 2nd nonconsecutive runs.
the consecutive 1 2 and 3 are just repeated runs one after the other after one of the non-consecutive runs. that is to check reload times. they are much faster of course :)
the reason i feel they are relevant is that you never go in and play one level, then reboot and play another. even if you load one map, say beach, then immediately load the next map, even though the map is different, you will get the speed of the 'consecutive' runs. so after the first map is loaded the loads are all screaming fast, i think it is cause the respective controller, or operating system or whatever, has already 'mapped' that portion of the drive. i know it isnt cache, cause the 9211 doesnt have cache and it really excels at this portion of it. however i have beaten the crysis load level times for the 9211 with the smaller stripe on 9260. go figure.
however for reasons such as wear leveling, or evenly using the drive, i am not sure if 16k is going to be a good 24/7 stripe size, because of the LBA and such. however i am no genius on that, maybe someone with a clearer idea of how that would effect the wearing of the drive could reply?
^^
It puts more stress on your drives. Say a 128kb file gets written to your array, 16kb gets placed on each of your drives and each drive has to erase a block to make this write. Total writes done = 8 times the block size. If stripe is 128kb or more in the same scenario then your total writes are 1 block size or 8 times less.
It wouldn't make wear leveling less effective, but it would increase writes quite a lot and you know the consequences of that yourself.
yes of course. so ideally then the best stripe for longevity purposes is 128?
Not 128 exactly, just larger is better. In my example having a larger stripe size than 128 would not make things better or worse, but if I were to use a larger block size in my example then it would matter.Quote:
Originally Posted by Computurd
cool, after i am done with this playing around im gonna split the array between the two controllers and retire the drives. TBH the 1/2 to 1 sec difference i will never notice....just need them to last after that, at least until the 18xx arrives, then hopefully by then i will have some 6gb/s devices to play with.
Dr. Busch talks about raid performance with ssd's in the Q&A on this podcast @ 47min 20 seconds. It's a shame he does not elaborate more but clearly he is not impressed with hard or soft raid.
http://intelstudios.edgesuite.net/id..._MEMS002/f.htm
This is probably n/a for acards? dig, dig.Quote:
Originally Posted by One_Hertz
Guys,
Don't get caught up in just writes, most operations are read and in order to utilize all (or at least most) SSD's in a raid, the stripe size should be according to the size of your files.
With a stripe size of 1MB and a file size of <1MB you'll only be reading from one of the SSD's, this does'nt take advantage of raid-0.
The main point would be reading from >1 drive.
Of course this puts a bit of a strain on the SSD's but again most operations are read, at least on a desktop computer.
Also remember that most SSD's (and raid controllers) are performing write combining to reduce the number/amount of writes.
That is not true because of read ahead/queue depth. It is true only if you are doing a single request, for example you want a single small file. But if you want like 10MB of small files then it will read from all SSDs even if stripe is like 1MB.Quote:
Originally Posted by Anvil
Of course.Quote:
Originally Posted by SteveRo
One Hertz,
Of cource, QD must be taken into consideration, but as a single (atomic) operation it is correct.
Have you tried to determine the actual QD during normal/heavy workload on your system?