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  1. #1
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    Question Adaptec 6405 vs LSI 9260-4i

    Hello,

    We have 4 Samsung 840 Pro and we want it for RAID10 array.
    What you suggest? Adaptec 6405 or LSI 9260-4i for performance?

    Currently we have Adaptec 6405 and and the dd test gives :

    [email protected] [/]# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
    16384+0 records in
    16384+0 records out
    1073741824 bytes (1.1 GB) copied, 2.86553 s, 375 MB/s

    do you believe that the LSI 9260-4i have better performance with samsung 840 pro?

  2. #2
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    Controllers does not support TRIM and you will burn the SSDs really fast.
    Use software Raid-10 and you will get a great performance.
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  3. #3
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    MDADM + AHIC works great with ssds. Make sure your mobo has 6Gb/s ports
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  4. #4
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    Get the LSI 9271 with FastPath, it will increase SSD performance by 3x as much as right now.
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  5. #5
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    And what if we dont have the LSI 9271, the LSI 9260-4i +bbu is better than Adaptec 6405 for performance with samsung 840 pro ?

    Quote Originally Posted by SolaDrive - John View Post
    Get the LSI 9271 with FastPath, it will increase SSD performance by 3x as much as right now.

  6. #6
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    LSI is the better card.
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  7. #7
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    We got an answer from the datacenter, we have LSI 9271 +bbu with FastPath, now what you suggest? software raid 10 or the LSI 9271 +bbu with FastPath for the samsung 840 pro?

  8. #8
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    why would you use the old tech of bbu instead of cachevault?

  9. #9
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    Again raid cards do not support TRIM. TRIM is working directly with the SSDs. In intensive write operations server and using MLC drives you will exhaust them really quick. If you are using Software raid you will be a lot better. Modern CPUs are really powerful and do not slow down with Software raid.
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  10. #10
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    Hello WebHostDog,

    Do you have any experience with Samsung 840 pro and software raid 10? we need performance and safety.

    Quote Originally Posted by WebHostDog View Post
    Again raid cards do not support TRIM. TRIM is working directly with the SSDs. In intensive write operations server and using MLC drives you will exhaust them really quick. If you are using Software raid you will be a lot better. Modern CPUs are really powerful and do not slow down with Software raid.

  11. #11
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    We never used so many SSDs in raid. See Samsung specs for the smallest 128GB SSD 840 Pro:

    Up to 530MB/sec Sequential Read* Performance may vary based on system hardware & configuration
    Up to 390MB/sec Sequential Write* Performance may vary based on system hardware & configuration

    So something is wrong you should have at least 600MB.s writes.
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  12. #12
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    +1 For LSI 9260
    Has more performance than Adaptec 6405 at all.

  13. #13
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    Quote Originally Posted by SolaDrive - John View Post
    Get the LSI 9271 with FastPath, it will increase SSD performance by 3x as much as right now.
    Is this from experience, because I've been hearing that it pretty much is a negligible boost?

  14. #14
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    Quote Originally Posted by Steven F View Post
    Is this from experience, because I've been hearing that it pretty much is a negligible boost?
    It is, while I don't have the exact statistics written down I can say that once we enabled fast path on a clients heavily database driven site that was using 4 x Intel 520's in Raid-10 we saw a good amount of IO wait reduce. I don't think its something that can be calculated by write/read or performance tests since from what I understand FastPath just helps improve routes of similar and frequent r/w's. LSI's website is what claims to increase speeds by x3 but I am not exactly sure if that is accurate or not, I do think in the right server though it holds it's worth.
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  15. #15
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    Quote Originally Posted by SolaDrive - John View Post
    It is, while I don't have the exact statistics written down I can say that once we enabled fast path on a clients heavily database driven site that was using 4 x Intel 520's in Raid-10 we saw a good amount of IO wait reduce. I don't think its something that can be calculated by write/read or performance tests since from what I understand FastPath just helps improve routes of similar and frequent r/w's. LSI's website is what claims to increase speeds by x3 but I am not exactly sure if that is accurate or not, I do think in the right server though it holds it's worth.
    I'm sure that in the right circumstances in their test environment, they were able to get a 3x boost in IOPs. It's definitely a marketing statistic, I was just curious if you hit the 3x mark.

  16. #16
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    Linux RAID doesn't support TRIM either. In fact, TRIM isn't a 'good thing' with typical server workloads either. Over provision is the answer if you're concerned with wearing.
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  17. #17
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    confused! So, LSI 9260-4i, software raid 10, or the LSI 9271 and FastPath for samsung 840 pro ?

  18. #18
    I like LSI/3ware better.

  19. #19
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    a correction, the raid that i have now is Adaptec 6405E with 128MB Cache Memory and not the 6405.

  20. #20
    Quote Originally Posted by Passw0rd View Post
    a correction, the raid that i have now is Adaptec 6405E with 128MB Cache Memory and not the 6405.
    The LSI 9271 will definitely perform better than the Adaptec 6405E

  21. #21
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    Software Raid 10 ( 4x samsung 840 pro)

    [[email protected] /]# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
    16384+0 records in
    16384+0 records out
    1073741824 bytes (1.1 GB) copied, 2.25662 s, 476 MB/s

  22. #22
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    Quote Originally Posted by Passw0rd View Post
    Software Raid 10 ( 4x samsung 840 pro)

    [[email protected] /]# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
    16384+0 records in
    16384+0 records out
    1073741824 bytes (1.1 GB) copied, 2.25662 s, 476 MB/s
    You can get a lot more from this SSD raid-10 with software raid tuning.
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