Choosing of HBA cards

Discussion in 'RAID Controllers and Host Bus Adapters' started by sonicz, Jul 8, 2015.

  1. sonicz

    sonicz Member

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    Hi all

    Since my new supermicro SC846 isn't really build for cards with ports in the front of the Card, Im looking for sugesstions

    Currently I have a M1015 and a 2108, but both is with the connectors in front. The cable length of the sff-8087 is a bit short for that. The cables I need is really exspensive and a pain to change.

    So looking for some other options.
    The 2108 I got is with 512mb cache and BBU. But I guess I can't get any fun out of that using the Card as a HBA, right?

    But I need 3 Cards with 2 sff-8087 ports on the "back" of the Card.
     
    #1
    Last edited: Jul 8, 2015
  2. PigLover

    PigLover Moderator

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    Look for LSI 9200-8i/9201have-8i/9211-8i cards on eBay. They have theare connectors on the end. They usually available at good prices.
     
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  3. Aliv Cherevko

    Aliv Cherevko New Member

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    Guys from here: ZFS Raidz Performance, Capacity and Integrity Comparison @ Calomel.org
    did a setup for each disk as a separate RAID0 array in the LSI raid controller.
    Scroll to read section: "How do you get ZFS to work through the LSI MegaRAID controller ?"

    I'm still guessing what is the best way to go: simple SAS2008 controller (lie 9211-8i) or a hardware RAID with cache and BBU and each disk is a RAID0 array.

    Will be appreciated for recommendations.
     
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  4. MiniKnight

    MiniKnight Well-Known Member

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    I don't think that one is too relevant to what the OP is trying to do.

    @PigLover has the right idea.

    If you're using those types of cards, you're still sff-8087 connector. You can Amazon/ Monoprice decent price cables for under $20/ ea and resell your old ones. Here's an example search.
     
    #4
  5. sonicz

    sonicz Member

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    I am thinking of making a new sw raid of some kind. Have been reading up on ZFS and it seems amazing, except the fact I cant grow the raid with a disk at a time.
    So is looking for some other way to go. Earlier I used mdadm with xfs filesystem. But I'm not doing that againg. Just tried using xpenology, but now sure I'm gonna stick with that.

    So any suggestions on that account?
     
    #5
  6. sonicz

    sonicz Member

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    Not sure what you mean, making a "raid array" with only one disk in each and then passthrough it and make sw raid on it?
     
    #6
  7. MiniKnight

    MiniKnight Well-Known Member

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    ZFS good. MDADM good. Or go something distributed.
     
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  8. PigLover

    PigLover Moderator

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    In most cases this is a particularly bad idea for ZFS. Even for a "single drive Raid0" the raid processor introduces a small amount of latency, which is bad.

    The really bad part is that you lose one of the best features of ZFS: array portability. The Raid headers written to each drive are proprietary to the particular raid card family you use - this make the drives unreadable by a "normal" HBA or another raid card family, which completely breaks the idea of portable export/import of your arrays.
     
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  9. sonicz

    sonicz Member

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    As I need to be able to grow my array, ZFS is not an option im afraid.
     
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  10. sonicz

    sonicz Member

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  11. Lance Joseph

    Lance Joseph Member

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    ZFS arrays can grow by adding vdev's.
    For instance, start with a two-way mirror:
    zpool create pool mirror /dev/sdb /dev/sdc

    Then later add another pair of disks.
    zpool add pool mirror /dev/sdd /dev/sde

    Easy. You can add disks and controllers as necessary.

    Also, I would try to find that card (or one very similar to it) for half that price.
    If maximum throughput isn't you goal, you can buy one HBA and a SAS expander card.
    This may be more cost effective than buying three HBAs.

    Thanks
     
    #11
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