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PERC 5/i RAID Card: Tips and Benchmarks - Page 421

post #4201 of 7183
Quote:
Originally Posted by DJZeratul View Post
I have heard speculation on Adaptave and Always Read Ahead... Always can be faster in most sequential read situations (Storage Drive), whereas Adaptive can be better for more of a staggered read situation (OS Drive)

Always Read Ahead will boost your benchmark scores but Adaptive can help with multiple file reads However, Always will always read ahead to the next stripe and cache it, so if you have data the drive needs to seek elsewhere on the drive, its gotta flush that cache and seek it elsewhere. It makes for very very fast sequential reads and is detrimental to random reads.


6.2 gave me gains of around 50 MB/sec read. It is very worth it. I was only able to get it to flash using the Windows Binary and the command line tool manually via DOS. UNIX has a similar one I believe, haven't tried it though.
Well, i finally opted to try Adaptive mode (i always considered that random accesses are the main spec to consider) .

OK, i'll try the fw upgrade and feedback as soon as done .

Thanks again,

Sincerely,
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post #4202 of 7183
In my new setup my SSD is connected to ICH10R as are all my other drives apart from my RAID 5 array, is there any advantage to moving things like the SSD or the RAID 0 Raptors I use to store my Games and programs to the Perc 5i?
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post #4203 of 7183
Quote:
Originally Posted by Starbuck5000 View Post
In my new setup my SSD is connected to ICH10R as are all my other drives apart from my RAID 5 array, is there any advantage to moving things like the SSD or the RAID 0 Raptors I use to store my Games and programs to the Perc 5i?
The Raptors will be faster on the Perc 5/i, and because you have a RAID 5 array, you'll see little to no CPU overhead with the Perc 5/i, unlike the ICH9R
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post #4204 of 7183
Quote:
Originally Posted by Tator Tot View Post
The Raptors will be faster on the Perc 5/i, and because you have a RAID 5 array, you'll see little to no CPU overhead with the Perc 5/i, unlike the ICH9R
Oh the RAID 5 array is already on the Perc 5/i, only thing that is currently
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post #4205 of 7183
Quote:
Originally Posted by Starbuck5000 View Post
Oh the RAID 5 array is already on the Perc 5/i, only thing that is currently
Ah, well your RAID 0 will be faster on a P5/i vs ICH9R, but the SSD won't matter as it's not in a RAID Config, nor is the PERC 5/i optimized for SSD's.
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post #4206 of 7183
Quote:
Originally Posted by Tator Tot View Post
Ah, well your RAID 0 will be faster on a P5/i vs ICH9R, but the SSD won't matter as it's not in a RAID Config, nor is the PERC 5/i optimized for SSD's.
Ok, thanks
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post #4207 of 7183
Just wanted to jump in this thread to say thanks. This thread "talked" me into buying a PERC 5 for my NAS box. I absolutley love the card!
I am running Ubuntu Server 9.10 on a separate disk than the raid card. My setup is currently:

Gigabyte ma74gm-s2 motherboard (AMD).
3 Western Digital 1 TB Green drives (with TLER and IDLE disabled using WDTLER and WDIDLE)
PERC 5 with BBU and SAS cables.

This thing rocks! The only thing I dont like is not being able to use the LSI Megaraid utility in Ubuntu. I have to boot the box to WinXP to use the util in order to work with the raid. I keep my OS drive off the raid and plugged into the SATA port on the mobo. I use the raid primarily for bulk storage, and intend on growing it by adding a 1 TB disk each month on payday

Has anyone had any luck getting the MegaRAID utility to work in Ubuntu or any other linux distro?

Also, I would like to benchmark my drive like many of you guys have done. What utility can I use without messing up the 600 gig of data on the array I have now? I am currently using XFS as my filesystem on the array. Are there any ubuntu tools to benchmark a drive using the XFS file system that wont destroy data on my array?

Thanks, and I am on page 60 of this thread.... its gonna take me a while to read the entire thread, but I am planning on trying to read it all
post #4208 of 7183
Quote:
Originally Posted by BooDaddy View Post
Just wanted to jump in this thread to say thanks. This thread "talked" me into buying a PERC 5 for my NAS box. I absolutley love the card!
I am running Ubuntu Server 9.10 on a separate disk than the raid card. My setup is currently:

Gigabyte ma74gm-s2 motherboard (AMD).
3 Western Digital 1 TB Green drives (with TLER and IDLE disabled using WDTLER and WDIDLE)
PERC 5 with BBU and SAS cables.

This thing rocks! The only thing I dont like is not being able to use the LSI Megaraid utility in Ubuntu. I have to boot the box to WinXP to use the util in order to work with the raid. I keep my OS drive off the raid and plugged into the SATA port on the mobo. I use the raid primarily for bulk storage, and intend on growing it by adding a 1 TB disk each month on payday

Has anyone had any luck getting the MegaRAID utility to work in Ubuntu or any other linux distro?

Also, I would like to benchmark my drive like many of you guys have done. What utility can I use without messing up the 600 gig of data on the array I have now? I am currently using XFS as my filesystem on the array. Are there any ubuntu tools to benchmark a drive using the XFS file system that wont destroy data on my array?

Thanks, and I am on page 60 of this thread.... its gonna take me a while to read the entire thread, but I am planning on trying to read it all
i'll save you several pages and jump to:

http://www.overclock.net/raid-contro...ml#post6289493
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post #4209 of 7183
Thread Starter 
I recommend you don't use the PERC controllers for SSDs.... there is a performance bottleneck.
Once again...
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Once again...
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post #4210 of 7183
BLinux,
thanks for the link! That would have taken me a while to get to those posts
I installed iozone from the repos, and have read the man for it. I cannot find how to run the tests against a particular disc. Currently I have my raid array on /dev/sdb1 and my OS disk on /dev/sdb6. I would like to run the tests against /dev/sdb1 but I do not see a switch to use for that.

Also, have you have any luck with the MegaRAID tools? Ideally, I would like to have a service or daemon run on my ubuntu server install and connect to the MegaRAID with client installed on my laptop. Im figuring the MegaRAID CLI will do this, but I cant get the package to work. Its an .rpm and I need a .deb. I have tried using alien, but am not having any luck.
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