SATA speed is half of what it should be

[robles]

Hi, I just noticed in dmesg that 2 of my 4 drives are operating at just 3 Gbps.

Code:

ada0: Serial Number WD-WCC4N1UL8F5X
ada0: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes)
ada0: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada0: quirks=0x1<4K>
ada0: Previously was known as ad4
ada1 at ata2 bus 0 scbus0 target 1 lun 0
ada1: <WDC WD30EZRX-00D8PB0 80.00A80> ATA-9 SATA 3.x device
ada1: Serial Number WD-WMC4N0D5EV23
ada1: 300.000MB/s transfers (SATA 2.x, UDMA5, PIO 8192bytes)
ada1: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada1: quirks=0x1<4K>
ada1: Previously was known as ad5
ada2 at ata3 bus 0 scbus1 target 0 lun 0
ada2: <WDC WD30EZRX-00D8PB0 80.00A80> ATA-9 SATA 3.x device
ada2: Serial Number WD-WMC4N0F34FEM
ada2: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes)
ada2: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada2: quirks=0x1<4K>
ada2: Previously was known as ad6
ada3 at ata3 bus 0 scbus1 target 1 lun 0
ada3: <WDC WD30EZRX-00D8PB0 80.00A80> ATA-9 SATA 3.x device
ada3: Serial Number WD-WMC4N0DCHP1C
ada3: 300.000MB/s transfers (SATA 2.x, UDMA5, PIO 8192bytes)
ada3: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada3: quirks=0x1<4K>
ada3: Previously was known as ad7

I confirmed it on smartctl for drives /dev/ada1 and /dev/ada3

Code:

smartctl 6.3 2014-07-26 r3976 [FreeBSD 9.3-RELEASE-p13 amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Green
Device Model:     WDC WD30EZRX-00D8PB0
Serial Number:    WD-WMC4N0D5EV23
LU WWN Device Id: 5 0014ee 6af6e6414
Firmware Version: 80.00A80
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Tue Jul 28 14:34:40 2015 CDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

I don't know how to diagnose this. Every drive is identical, same capacity, model and firmware. There's no manual control for speed in the BIOS and I'm at a loss. Does anybody know how can I solve this issue?

Thanks for any help!

 

[anodos]

Post full hardware specs.

 

[Spearfoot]

What controller are the drives plugged in to? For example, many motherboards have 2 x SATA 3 (6Gb/s) ports and 4 x SATA 2 (3Gb/s) ports.

 

[sfcredfox]

I am wondering what mode the controllers are in also. AHCI or maybe an emulation mode? Some boards do funny things with the port depending on BIOS settings.

 

[robles]

pciconf lists two controllers:

Code:

atapci0@pci0:0:31:2:    class=0x01018f card=0x330d103c chip=0x1c008086 rev=0x05 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '6 Series/C200 Series Chipset Family 4 port SATA IDE Controller'
    class      = mass storage
    subclass   = ATA
    bar   [10] = type I/O Port, range 32, base 0x1000, size  8, enabled
    bar   [14] = type I/O Port, range 32, base 0x1008, size  4, enabled
    bar   [18] = type I/O Port, range 32, base 0x1010, size  8, enabled
    bar   [1c] = type I/O Port, range 32, base 0x1018, size  4, enabled
    bar   [20] = type I/O Port, range 32, base 0x1020, size 16, enabled
    bar   [24] = type I/O Port, range 32, base 0x1030, size 16, enabled
    cap 01[70] = powerspec 3  supports D0 D3  current D0
    cap 13[b0] = PCI Advanced Features: FLR TP
atapci1@pci0:0:31:5:    class=0x010185 card=0x330d103c chip=0x1c088086 rev=0x05 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '6 Series/C200 Series Chipset Family 2 port SATA IDE Controller'
    class      = mass storage
    subclass   = ATA
    bar   [10] = type I/O Port, range 32, base 0x1040, size  8, enabled
    bar   [14] = type I/O Port, range 32, base 0x1048, size  4, enabled
    bar   [18] = type I/O Port, range 32, base 0x1050, size  8, enabled
    bar   [1c] = type I/O Port, range 32, base 0x1058, size  4, enabled
    bar   [20] = type I/O Port, range 32, base 0x1060, size 16, enabled
    bar   [24] = type I/O Port, range 32, base 0x1070, size 16, enabled
    cap 01[70] = powerspec 3  supports D0 D3  current D0
    cap 13[b0] = PCI Advanced Features: FLR TP

Is there a way to see where are each drive is connected to?

Also the drives' SATA mode is "SATA legacy mode".

Hardware Specs:
HP Microserver G8 G2020
Build FreeNAS-9.3-STABLE-201506042008
Platform Intel(R) Pentium(R) CPU G2020T @ 2.50GHz
Memory 16323MB
Storage 4xWD30EZRX flashed with WDIDLE

 

[anodos]

See documentation for B120i storage controller here: http://www8.hp.com/h20195/v2/GetPDF.aspx/c04168333.pdf

• Up to 6Gb/s SATA drive support (600MB/s bandwidth per physical link)
• x2 6Gb/s SATA physical links (compatible with 3Gb/s SATA ) NOTE: Two SATA ports will be running at 6Gb/s and reaming ports will be running at 3Gb/s

 

[robles]

See documentation for B120i storage controller here: http://www8.hp.com/h20195/v2/GetPDF.aspx/c04168333.pdf

• Up to 6Gb/s SATA drive support (600MB/s bandwidth per physical link)
• x2 6Gb/s SATA physical links (compatible with 3Gb/s SATA ) NOTE: Two SATA ports will be running at 6Gb/s and reaming ports will be running at 3Gb/s

This is it, unfortunately it seems I won't be able to do anything about it. I have no idea how you found that info so quickly, thanks for the help!

 

[danb35]

The good news is that it doesn't matter. Spinning rust can barely saturate 1.5 Gb/s on a good day, much less 3 Gb/s or 6 Gb/s.

 

[Spearfoot]

The good news is that it doesn't matter. Spinning rust can barely saturate 1.5 Gb/s on a good day, much less 3 Gb/s or 6 Gb/s.

Heh heh... @danb35 is right. My 'test' FreeNAS system's pool is a hodge-podge of disks running at 3 Gb/s and it's just as fast as my zippy SATA 3 system.