External raid card

Discussion in 'RAID Controllers and Host Bus Adapters' started by KarlFranz, Mar 21, 2019.

  1. KarlFranz

    KarlFranz New Member

    Joined:
    Mar 18, 2019
    Messages:
    22
    Likes Received:
    0
    I can't imagine when a external raid card is useful.

    For internal, you can connect more drives IN your case. But for external? How to power your external drives?

    Someone can explain it to me please? Or post some pictures.

    Thank you in advance.
     
    #1
  2. ttabbal

    ttabbal Active Member

    Joined:
    Mar 10, 2016
    Messages:
    692
    Likes Received:
    186
    They are called JBOD cases. It's basically a case, power supply, and drive bays with a port to connect the external HBA. There are special cables for this use. Not used a lot by home users, though there are a few, think cloud storage providers.
     
    #2
  3. KarlFranz

    KarlFranz New Member

    Joined:
    Mar 18, 2019
    Messages:
    22
    Likes Received:
    0
    So.

    If I bought a 8port external card.

    I need 2 cable mini sas to mini sas and another card with 8port external and 8 port internal in a "jbod case" to add 8 drives to main system?

    I can't figure how it work. And why buy this versus internal card.
     
    #3
  4. BoredSysadmin

    BoredSysadmin Active Member

    Joined:
    Mar 2, 2019
    Messages:
    130
    Likes Received:
    26
    Simply because I've run out of physical space inside the case and wanted to expand my NAS with additional drives. I've recently bought an external SAS JBOD shelf. It came with external SAS ports. Once wired to my main NAS pc, these (12) drives are showing up as internal drives. with 6gbps connectivity (or 12gbps on newer models) you aren't losing my performance vs internal drives.
    Also, keep in mind that SAS is backward compatible with SATA drives.
    One other thing is you could daisy-chain SAS shelves for even more drives.
     
    #4
  5. KarlFranz

    KarlFranz New Member

    Joined:
    Mar 18, 2019
    Messages:
    22
    Likes Received:
    0
    #5
  6. BoredSysadmin

    BoredSysadmin Active Member

    Joined:
    Mar 2, 2019
    Messages:
    130
    Likes Received:
    26
    Basically yes. One nuance: You do not always have to build your own JBOD case, but you could just get enterprise level SAS JBOD shelf out eBay for peanuts. I bought external SAS HBA, Sas mini cables and this shelf for a total of $175 shipped.
    Xyratex JBOD Expansion Array 12 x 3.5" 6Gb/s SAS Hard Drive Bay HB-1235 Dell HP | eBay

    One big catch is this shelf is quite loud, but it doesn't bother me as I don't hear it humming away in the basement.
     
    #6
  7. gregsachs

    gregsachs Member

    Joined:
    Aug 14, 2018
    Messages:
    150
    Likes Received:
    23
    Here is an example of just such a diy jbod, showing the intel sas expander and the supermicro sff8088/8087 cable hooked to it. This is a AIC industrial 2u 12x3.5" bay chassis I got for peanuts. Also what it looks like in megaraid, along with my xb-1235. Now I'll go shut the diy box back down, it is backup only...
     

    Attached Files:

    #7
  8. KarlFranz

    KarlFranz New Member

    Joined:
    Mar 18, 2019
    Messages:
    22
    Likes Received:
    0
    So this could be a good exemple a external case to buy?

    DELL PowerVault MD3000 14x 3.5" bays with caddy 250$
    DELL EqualLogic PS400 14x 3.5" bays with caddy 400$

    I currently have a 4u rosewing 15x bays with 2x2tb, 11x3tb and 2x6tb.

    I need to choice.

    Buy 2x 10tb new drives $$$$$

    Or buy a external case with a lot of space and buy many refurb 3tb drives with some 3tb drives spare if one become dead.

    P.s. the 2 cade are sale at kijiji a vendor from montreal Qu├ębec.
     
    #8
Similar Threads: External raid
Forum Title Date
RAID Controllers and Host Bus Adapters SAS/SATA/RAID controller for external chassis Mar 18, 2012
RAID Controllers and Host Bus Adapters Cheap SAS (Preferably LSI) with External ports May 6, 2018
RAID Controllers and Host Bus Adapters Drive IO errors on external SAS JBOD Jul 16, 2017
RAID Controllers and Host Bus Adapters Hba with external ports Jun 30, 2017
RAID Controllers and Host Bus Adapters Help with external SAS card to attach SAS box Oct 17, 2016

Share This Page