# [OmniOS-discuss] High density 2.5" chassis

Nate Smith nsmith at careyweb.com
Wed May 13 18:50:54 UTC 2015

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    I’ve been running an all-ssd setup on a Dell R720, with dual 9207-8i cards connected to dual 8x2.5 disk backplane. (9207-8i is one of the only cards that doesn’t interfere with the BIOS, as dell Implemented it for Tape Drive Support). Boot disks are hooked up internally connected to the onboard sata (I could use USB).  I’ve been using Samsung 843TN drives which could be purchased fairly cheaply for a while. They are underprovisioned at 480GB, and feature a supercap to ensure writes in the event of a powerloss. Plus they have a long write endurance cycle. It has worked well so far, outside of some Queue Depth problems with my fibre channel. I was originally going to use the R720XD, but I found that the backplane uses expanders instead of going 1:1.  I run a 15 disk RAIDZ6 with a hotspare.

    -Nate

    From: OmniOS-discuss [mailto:omnios-discuss-bounces at lists.omniti.com] On Behalf Of Schweiss, Chip
    Sent: Saturday, May 09, 2015 3:29 PM
    To: Chris Nagele
    Cc: omnios-discuss at lists.omniti.com
    Subject: Re: [OmniOS-discuss] High density 2.5" chassis

    I have an SSD server in one of those chassis.  Here's a write-up about it on my blog, there are 3 postings about it.

    http://www.bigdatajunkie.com/index.php/9-solaris/zfs/10-short-stroking-consumer-ssds
    Not necessarily a build for everyone, but it has been absolutely awesome for our use. After a few bumps at the beginning and giving up on HA on this server, it has been rock solid.  Many will swear against the interposers, but combined with Samsung SSDs they have worked very well.
    -Chip

    On Sat, May 9, 2015 at 1:06 PM, Chris Nagele <nagele at wildbit.com> wrote:
    Hi all. Continuing on my all SSD discussion, I am looking for some
    recommendations on a new Supermicro
    chassis for our file servers. So far I have been looking at this
    thing:

    http://www.supermicro.com/products/chassis/4U/417/SC417E16-R1400LP.cfm

    Does anyone have experience with this? If so, what would you recommend
    for a motherboard and HBA to support all of the disks? We've
    traditionally used the X9DRD-7LN4F-JBOD or the X9DRi-F with a LSI
    9211-8i HBA.

    Thanks,
    Chris
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