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Controllers And Setup: Adaptec RAID 5805

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2:00 AM - 07/30/2009 by Patrick Schmid and Achim Roos

Adaptec’s state-of-the-art Unified Serial host adapter product line is called the 5-series. There are many different models, each tailored to different internal/external storage requirements, such as low profile versus full-height cards as well as various port counts. Model 5805 is a low profile, eight-port internal SAS/SATA card.

Adaptec currently offers up to 28 ports on a single card. However, we deliberately went after two eight-port cards instead of one card with a massive number of ports so we could distribute the bandwidth across two PCI Express slots. If you look at the typical SAS/SATA HBA interface, you’ll find that it’s a first-gen x8 PCI Express connection, which reaches a maximum of 2 GB/s. Since we wanted to reach higher throughput, we had to go for two cards and create a software RAID array using the operating system.

We looked at the 5-series by Adaptec more than a year ago, but it’s still a top notch product line. The latest upgrade to the famnily was the 5Z-series, which introduces Adaptec’s Zero Maintenance Cache protection. Conventional RAID controllers come with a cache memory, typically ECC DRAM, and an optional battery backup unit, which maintains the cache content in the case of a power failure. Adaptec’s approach integrates flash memory with the controllers, saving the DRAM cache content into non-volatile flash memory.

System Details and Device Configuration

We decided not to assemble a purpose-built system for this project, since we wanted the 16-drive flash SSD array to be suitable to any upper-mainstream system, such as our Storage Reference Test System. Hence the test environment consisted of a Core i7-920 (2.66 GHz) on a Supermicro X8SAX motherboard, 3 GB of Corsair CM3X1024 DDR3 memory, and an OCZ EliteXstream 800W power supply.

The only change we had to make to the reference system configuration was the graphics card. The Radeon HD 3450 had to go away, as it utilized a PCI Express slot we needed for the RAID controller. The replacement was an old GeForce 4 MX 440 with 128 MB of memory and a PCI interface.

Talkback
xyz001 07/30/2009 8:11 AM
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-4+

how fast does it boot windows?

IronRyan21 07/30/2009 8:15 AM
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-6+

can toms give this away like the SBM! I have no idea why I would need this tho. :)

lutel 07/30/2009 8:20 AM
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-12+

how fast does it open solitaire ?

afrobacon 07/30/2009 8:24 AM
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chise1 07/30/2009 8:25 AM
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-13+

can we have some benchmarks that aren't just I/O performance? How about boot times and/or program load times?

dirtmountain 07/30/2009 8:36 AM
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-4+

You should always include a retail price tag for these articles. If it's in there someplace i missed it.

apache_lives 07/30/2009 8:58 AM
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-3+

Any non windows based benchmarks incase there is any sort of limit of throughput etc?

Windows does some funky things to hdd transfers - buffering things through ram and all sorts to find extra performance - wouldnt supprise me if that 2gb/s limit had something to do with software accessing the ram through the layers and windows subsystem etc

falchard 07/30/2009 8:59 AM
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apache_lives 07/30/2009 8:59 AM
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-1+

xyz001 :
how fast does it boot windows?



half of the start up time on the windows side (aka not including bios time) is the PNP initialization and network loading/waiting etc - check the hdd read light on high end systems

apache_lives 07/30/2009 9:00 AM
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-1+

falchard :
I am pretty sure the new Intel SSDs still don't have a good write speed compared to the Indolex controlled SSDs.



Every other spec Intel owns hands down like random writes etc which makes them the far better drive

cangelini 07/30/2009 9:25 AM
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-5+

dirtmountain :
You should always include a retail price tag for these articles. If it's in there someplace i missed it.



Dirt,
You're looking at close to $14k worth of drives/controllers :)

amnotanoobie 07/30/2009 9:31 AM
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-3+

Too bad my money tree couldn't buy me even one X25-E.

And yeah where are the application load times?

Ramar 07/30/2009 9:57 AM
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-0+

When/if I ever have enough people paying me for space on my server, I know what to do.

We've come a long way from "Loading..." screens in Half Life 2 every five minutes or less.

dean heart 07/30/2009 10:01 AM
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-5+

Gonna say it as well: Please benchmark application loadtimes; photoshop with different filesizes and ofcourse level loadtimes in Crysis :)

chyll2 07/30/2009 10:32 AM
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-4+

I wish they also have real-world results/benches. Im not that familiar with synthetic benchmarks.

al2950 07/30/2009 10:35 AM
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-3+

You will not be able to get faster speeds than that using 2 8x PCI-E. Even though the theoretical bandwidth is 2GB/s I have only even been able to get around 1.15GB/s, whwich is pretty close to what you are seeing. I would be interested to see what happens if you use 3 Raid controllers :), although i cant remeber how many total physical lanes are available on the X58 chipset

profundido 07/30/2009 10:36 AM
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ossie 07/30/2009 10:38 AM
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mitch074 07/30/2009 10:53 AM
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--2+

I wonder what performance Linux's ext4 file system would get out of that array... Since, after all, Windows (any version) is sorely lagging behind *NIX systems on I/O throughput.

tacoslave 07/30/2009 10:55 AM
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-3+

from what ive seen those are perfectly valid questions because we ARE reading because were curious. By the way most comments on toms arent retarded (flaming,fanboys = retard post.)Anyways I think most of us were thinking the same thing since most of us won't ever buy something like that. windows boot time = around 2 min for my pc
ultimate array = ?


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