Looking for some assistance. I updated my server yesterday and am noticing very slow write speeds compared to 5.05.  I tried to upgrade a year ago and had the same issue.  Any suggestions?    I would hate to have to go back again...I have included hardware info:

 

5.05 - 40-60 mbps

6.2 2-3 mbps - Crazy slow

 

0:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller [8086:0150] (rev 09)

00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port [8086:0151] (rev 09)

00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09)

00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04)

00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)

00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)

00:1c.0 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 [8086:1e10] (rev c4)

00:1c.4 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 5 [8086:1e18] (rev c4)

00:1c.5 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev c4)

00:1c.6 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 7 [8086:1e1c] (rev c4)

00:1c.7 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 8 [8086:1e1e] (rev c4)

00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04)

00:1f.0 ISA bridge [0601]: Intel Corporation Z77 Express Chipset LPC Controller [8086:1e44] (rev 04)

00:1f.2 SATA controller [0106]: Intel Corporation 7 Series/C210 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e02] (rev 04)

00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller [8086:1e22] (rev 04)

01:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 10)

03:00.0 USB controller [0c03]: VIA Technologies, Inc. VL80x xHCI USB 3.0 Controller [1106:3432] (rev 03)

04:00.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev 41)

05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10)

06:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8161 Gigabit Ethernet [1969:1091] (rev 10)

07:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller [1b4b:9172] (rev 11)

 

No IOMMU Groups

cpu 0 <===> cpu 2

cpu 1 <===> cpu 3

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 005 Device 004: ID 0781:5571 SanDisk Corp. Cruzer Fit

Bus 005 Device 003: ID 051d:0002 American Power Conversion Uninterruptible Power Supply

Bus 005 Device 002: ID 2109:0811 VIA Labs, Inc. Hub

Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[0:0:0:0]    disk    SanDisk  Cruzer Fit      2.01  /dev/sda  4.00GB

[1:0:0:0]    disk    ATA      WDC WD30EFRX-68E 0A82  /dev/sdb  3.00TB

[2:0:0:0]    disk    ATA      ST3000VN000-1H41 SC43  /dev/sdc  3.00TB

[3:0:0:0]    disk    ATA      WDC WD30EFRX-68E 0A80  /dev/sdd  3.00TB

[4:0:0:0]    disk    ATA      WDC WD30EFRX-68E 0A80  /dev/sde  3.00TB

[5:0:0:0]    disk    ATA      WDC WD30EFRX-68A 0A80  /dev/sdf  3.00TB

[7:0:0:0]    disk    ATA      WDC WD30EFRX-68A 0A80  /dev/sdg  3.00TB

[8:0:0:0]    disk    ATA      TOSHIBA DT01ABA3 ABB0  /dev/sdh  3.00TB

[9:0:0:0]    disk    ATA      TOSHIBA DT01ACA3 ABB0  /dev/sdi  3.00TB

[10:0:0:0]  disk    ATA      HGST HTS721010A9 A3B0  /dev/sdj  1.00TB

[10:1:0:0]  disk    ATA      WDC WD30EFRX-68A 0A80  /dev/sdk  3.00TB

[10:2:0:0]  disk    ATA      ST3000VN000-1H41 SC43  /dev/sdl  3.00TB

[10:3:0:0]  disk    ATA      ST32000542AS    CC95  /dev/sdm  2.00TB

[10:4:0:0]  disk    ATA      WDC WD30EFRX-68E 0A82  /dev/sdn  3.00TB

 

If you are coming from v5 you may not know about the diagnostics feature, but you'll need to provide your diagnostics file in order for anyone to give meaningful suggestions.  See the "Need help? Read me first!" sticky in this forum.