Jay - UFS Partition

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Hi Alan and Benedict!​


I am sort of a newcomer to BSD, and I was trying to setup a ZFS pool on my Dell R610 server running FreeBSD 11.

The drives are connected via SATA to a SAS PERC 6/i backplane, and I need to create a pool of some sort that combines them all (with minimal loss of storage capacity)
I have tried striping them all with RAID0, and I have also tried creating partitions 


I cannot get the pool to the speeds that I expected when striping or even in RAIDZ. I consistently max out at 60 megabytes/sec even though I know the drives are much more capable than that.

The single SSD that I installed BSD onto is capable of 80-110 Megabytes/sec, and when I "dd" /dev/zero to /dev/null, I get around 200+ Megabytes/sec speeds so I know I am not bottlenecked by that.


If I create a UFS partition on a disk, and write to that, I get much faster writes of 80-110 so I ruled out the backplane bottlenecking writes. What's going on?


Can you provide suggestions on how to proceed?


Thanks, and keep it up!


Nitty Gritty Details on the layout:


For creating the partitions necessary for raidz, I did the following:

My RAIDZ Attempt

       For each 110GB section, I created as many sections I could on the drives

       1. gpart create -s gpt da[1-5]

       2. gpart add -s 110G -t freebsd-zfs -l boot da[1-5]

       Then did 

       3. zpool create vmpool raidz da1p1 da2p1 da2p2 da2p3 da2p4 da3p1 da4p1 da5p1 da5p2


I also tried just giving ZFS the drives themselves da1,da2, etc, but no cigar


SSD details:

Here is the output of geom list disk
Geom name: da1
Providers:
1. Name: da1
   Mediasize: 120034123776 (112G)
   Sectorsize: 512
   Mode: r1w1e2
   descr: ATA KINGSTON SUV400S
   rotationrate: 0
   fwsectors: 63
   fwheads: 255

Geom name: da2
Providers:
1. Name: da2
   Mediasize: 480103981056 (447G)
   Sectorsize: 512
   Mode: r4w4e8
   descr: ATA INTEL SSDSC2KW48
   rotationrate: 0
   fwsectors: 63
   fwheads: 255

Geom name: da3
Providers:
1. Name: da3
   Mediasize: 120034123776 (112G)
   Sectorsize: 512
   Mode: r1w1e2
   descr: ATA SSD2SC120G3LC709
   rotationrate: 0
   fwsectors: 63
   fwheads: 255

Geom name: da4
Providers:
1. Name: da4
   Mediasize: 120034123776 (112G)
   Sectorsize: 512
   Mode: r1w1e2
   descr: ATA KINGSTON SUV400S
   rotationrate: 0
   fwsectors: 63
   fwheads: 255

Geom name: da5
Providers:
1. Name: da5
   Mediasize: 240057409536 (224G)
   Sectorsize: 512
   Mode: r2w2e4
   descr: ATA INTEL SSDSC2KW24
   rotationrate: 0
   fwsectors: 63
   fwheads: 255
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