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PERC 5/i RAID Card: Tips and Benchmarks - Page 270

post #2691 of 7184
Quote:
Originally Posted by DuckieHo View Post
What does Windows Disk Management report?
I don't know, will the VD keep initializing if I leave the BIOS and go into the OS?
    
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post #2692 of 7184
Thread Starter 
Quote:
Originally Posted by Vric View Post
I have been using my PERC5 card for the last 3 month without problem.

For the last 2 weeks, the card isn't working correctly.

When I boot the computer, the card initialize correctly. But when in Windows, half of the time the drive isn't shown. The other half of the time, the drive is working for 2-5 minutes then the array freeze and Windows eventually drop the drive letter.

I tried to change the PCI-X slot, but only one is working. I just formated (I was on Windows 7, now back to Vista) and same problem again.

There is no problem in the device manager, nor in the MegaRaid Manager (when it work)

If you have any idea, I would appreciate.

Thanks
It is PCIe or PCI-E. PCI-X is different slot completely.

What motherboard are you using?

What kind of cooling are you using?
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post #2693 of 7184








Using 36gb Seagate Savvio 15k rpm SAS drives. I've settled for a 7x drive Raid5 @ 128k with the 8th drive as a hotspare. It seems like the cpu on these cards maxes out around 300mb/s for raid5 calcs.

The sound they make when doing the IOPS write test is




Edited by MetalPhreak - 6/26/09 at 5:04pm
post #2694 of 7184
Hi Guys,

Need some help speeding up my Perc 5i array.


Its 2am. And I have just spent and entire day going through this thread.

All very tiring.

Here is what I have done:

I have got the Perc 5i installed, with BBU in an 8x PCI slot. (I did the 5 and 6 pin mod with nail varnish)

I have added heatsinks to the board, and a fan, so it should be cool enough.

I have updated the onboard firmware to this Dell one - 5.2.2.-0072, A09 which I think is the latest.

I can't figure out this LSI stuff that everyone is going on about. Seems to involve command lines and be unduly complicated.

I have downloaded MegaRaid Storage Manager and installed it. But I haven't got a scoobies how you guys are managing to use it?

When I open it up it and click 'connect'. It has a server Ip address, and then asks for a username and password.

I have no idea what username or password to use. So I leave them blank and click enter, but it comes up with 'Login Failed: Invalid Usaername and Password'. So thats that. I am stuck using the Dell one on boot up.

After much tooing and frowing for hours on end I did figure out how to set up the array in Dells Configuration Utility, but the results are quite dissappointing, hence this post.

The system is all new. i920 on a Gigabyte Ga-EX58-UD5 motherboard.

I have got 7 x 1TB drives connected to the Perc 5i. These are Samsung F1 Drives (HD103UJ)

I set them up as:

6 x 1Tb - Raid 5
Plus, 1 x 1Tb Hot Spare

Stripe Element Size - 64KB
Read Policy - Adaptive Read Ahead
Write Policy - Write Back

There is also another page which shows the disks. That has 'Write Cache - Disk Default'. But there doesn't seem to be any way to change it.

I setup the disk in windows with the default settings.

I have downloaded HD Tune and done some benchmarks.

Read:

Minimum - 118.1 MB /SEC
Maximum - 150.8 MB/SEC
Average - 135.8 MB/SEC
Access Time - 10.6 ms
Burst Rate - 326.3 MB/SEC
CPU USage - Minus 1.0%

I also tried setting the stripe to 128k with the rest of the settings the same (ie I rebuilt the array etc from scratch). But the results were much the same. Slightly slower actually. The minimum and average were about the same, but the maximum went down to 135 mb/sec

Not sure what I am doing wrong. For 7 disks (or 6 if you exclude the hot spare). It still seems quite slow.

ANY IDEAS?

Thanks.

Stuart
post #2695 of 7184
login with administrator to MegaRaid Storage Manager
post #2696 of 7184
Thread Starter 
MegaRAID

User ID: Your PC's Login
Password: You Login's PW
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post #2697 of 7184
In HDTune options, change the Block Size option to 8MB.

Alternatively, use something like ATTO which will test a variety of block sizes.

And then there is also Crystal Disk Mark which seems to be one of the apps more suited to testing real world performance.


In HDTune with 1kb block size I only get 14MB/s




Edited by MetalPhreak - 6/26/09 at 7:40pm
post #2698 of 7184
Quote:
Originally Posted by MetalPhreak View Post
Using 36gb Seagate Savvio 15k rpm SAS drives. I've settled for a 7x drive Raid5 @ 128k with the 8th drive as a hotspare. It seems like the cpu on these cards maxes out around 300mb/s for raid5 calcs.
It is possible to get close to the theoretical limit of the PERC 5/I (which is about 500MB/sec on RAID5 writes). My benchmarking on sequential I/O in Linux with XFS got over 420MB/sec sustained writes to a RAID5 using 7200RPM SATA drives (8x):

http://www.overclock.net/6289493-post2491.html

With SAS 15K drives, I would think you should be able to fair better, but I doubt you would exceed 500MB/sec on RAID5 writes.
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TAIPEI
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post #2699 of 7184
Quote:
In HDTune options, change the Block Size option to 8MB.

Alternatively, use something like ATTO which will test a variety of block sizes.

And then there is also Crystal Disk Mark which seems to be one of the apps more suited to testing real world performance.


In HDTune with 1kb block size I only get 14MB/s
Thanks for the heads up MetalPhreak. I would never have figured that out in a million years.

That made a BIG difference. (to my state of mind anyway, the setup is the same :-))

At 8mb in HD Tune Pro the numbers were (6 x 1TB Spinpoints Raid 5 - Plus Another Hot Spare):

(Re - 128KB stripe size, Adaptive Read Ahead, Write Back)

Minimum - 387.8 MB/sec
Maximum - 562.9 MB/SEC
Average - 506.0 MB/SEC
Access Time - 11.0 MS
Burst Rate - 338.8 MB/SEC
CPU Usage - Minus 1.0%

Now, that is much more like it :-)

I am assuming that my result was a good one?

Is there a standard setting then that people are using with these HD Tune Benchmarks in here so I can compare?

I assumed it would test a range of files. Otherwise whats the point of calling it a 'benchmark' if no-one has any idea what another person was testing?

I tried ATTO as you suggested: (It lives here in case anyone else is looking - http://www.techpowerup.com/downloads/1137/mirrors.php)

Similar results. About 300 mb/sec Write for 64 - 8192, About 500 mb/sec (up to 650 mb/sec for 128 and 256) for Read (same range - 64 - 8192)

Seems pretty good. I am however now wondering whether I should have stuck with a stripe size of 64kb? Would that have produced better results than 128k stripe?

In all honesty though, I am happy enough with those numbers. So just now need to tweak what I have :-)



The device is going to mainly be used for storage.

Quote:
login with administrator to MegaRaid Storage Manager

MegaRAID

User ID: Your PC's Login
Password: You Login's PW
Lightning bolt moment - Just realised that my computer is called 'Stuart' lol So when I put that in for the username it became a happy camper and let me in.

Ok. So, second question.

Now I am finally in to MegaRaid Storage Manager (the Perc 5i is running the Dell firmware 5.2.2-0072)

Is there anything else I can do in Megaraid Storage Manager (tweaks, changes to settings etc?) to speed up or optimise further?
post #2700 of 7184
Quote:
Originally Posted by DuckieHo View Post
What does Windows Disk Management report?
Okay, it's all done initiallizing finally.

Disk Management says 931GB (Primary Partition) & 931GB (Unallocated).

Also, what settings do you recommend for a 3 disk RAID 5 in the controller's BIOS?
    
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