Greetings all. I'm on FreeBSD 9.1-STABLE #0 r251391M. I'm noticing two
of my SATA disks are at half speed. Is this normal or is there some
configuration I'm forgetting?
# dmesg | grep -C 4 ahc
...
ahci0: <Intel Patsburg AHCI SATA controller> port
0x2070-0x2077,0x2060-0x2063,0x2050-0x2057,0x2040-0x2043,0x2020-0x203f
mem 0xd0b00000-0xd0b007ff irq 21 at device 31.2 on pci0
ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich3: <AHCI channel> at channel 3 on ahci0
ahcich4: <AHCI channel> at channel 4 on ahci0
ahcich5: <AHCI channel> at channel 5 on ahci0
...
ada0: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device
ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad4
ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
ada1: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device
ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad6
ada2 at ahcich2 bus 0 scbus2 target 0 lun 0
ada2: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device
ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
^^^^^^^^^
ada2: Command Queueing enabled
ada2: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C)
ada2: Previously was known as ad8
ada3 at ahcich3 bus 0 scbus3 target 0 lun 0
ada3: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device
ada3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
^^^^^^^^^^^
ada3: Command Queueing enabled
ada3: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C)
ada3: Previously was known as ad10
# pciconf -lcvb
ahci0 at pci0:0:31:2: class=0x010601 card=0x35ae8086 chip=0x1d028086
rev=0x06 hdr=0x00
vendor = 'Intel Corporation'
device = 'Patsburg 6-Port SATA AHCI Controller'
class = mass storage
subclass = SATA
bar [10] = type I/O Port, range 32, base 0x2070, size 8, enabled
bar [14] = type I/O Port, range 32, base 0x2060, size 4, enabled
bar [18] = type I/O Port, range 32, base 0x2050, size 8, enabled
bar [1c] = type I/O Port, range 32, base 0x2040, size 4, enabled
bar [20] = type I/O Port, range 32, base 0x2020, size 32, enabled
bar [24] = type Memory, range 32, base 0xd0b00000, size 2048, enabled
cap 05[80] = MSI supports 1 message enabled with 1 message
cap 01[70] = powerspec 3 supports D0 D3 current D0
cap 12[a8] = SATA Index-Data Pair
cap 13[b0] = PCI Advanced Features: FLR TP
Thanks for any insight provided.
--
Dave Hayes - Consultant - Altadena CA, USA - dave at jetcafe.org
>>>> *The opinions expressed above are entirely my own*
<<<<
"The ultimate aim of dancing is to be able to move *without*
thinking. To *be* danced."
-John Blacking
On Thu, Jun 27, 2013 at 5:21 PM, Dave Hayes <dave at jetcafe.org> wrote:> Greetings all. I'm on FreeBSD 9.1-STABLE #0 r251391M. I'm noticing two of my > SATA disks are at half speed. Is this normal or is there some configuration > I'm forgetting?In my experience it's fairly common to have a mix of 6Gb/s and 3Gb/s ports. In particular, see: http://en.wikipedia.org/wiki/Intel_X79#Features
Jeremy Chadwick
2013-Jun-28 01:38 UTC
AHCI Patsburg SATA controller and slow transfer speed
On Thu, Jun 27, 2013 at 02:21:57PM -0700, Dave Hayes wrote:> Greetings all. I'm on FreeBSD 9.1-STABLE #0 r251391M. I'm noticing > two of my SATA disks are at half speed. Is this normal or is there > some configuration I'm forgetting? > > # dmesg | grep -C 4 ahc > ... > ahci0: <Intel Patsburg AHCI SATA controller> port > 0x2070-0x2077,0x2060-0x2063,0x2050-0x2057,0x2040-0x2043,0x2020-0x203f > mem 0xd0b00000-0xd0b007ff irq 21 at device 31.2 on pci0 > ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported > ahcich0: <AHCI channel> at channel 0 on ahci0 > ahcich1: <AHCI channel> at channel 1 on ahci0 > ahcich2: <AHCI channel> at channel 2 on ahci0 > ahcich3: <AHCI channel> at channel 3 on ahci0 > ahcich4: <AHCI channel> at channel 4 on ahci0 > ahcich5: <AHCI channel> at channel 5 on ahci0 > ... > ada0: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device > ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes) > ada0: Command Queueing enabled > ada0: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) > ada0: Previously was known as ad4 > ada1 at ahcich1 bus 0 scbus1 target 0 lun 0 > ada1: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device > ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes) > ada1: Command Queueing enabled > ada1: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) > ada1: Previously was known as ad6 > ada2 at ahcich2 bus 0 scbus2 target 0 lun 0 > ada2: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device > ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) > ^^^^^^^^^ > ada2: Command Queueing enabled > ada2: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) > ada2: Previously was known as ad8 > ada3 at ahcich3 bus 0 scbus3 target 0 lun 0 > ada3: <WDC WD200MFYYZ-01D45B0 01.01K01> ATA-8 SATA 3.x device > ada3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) > ^^^^^^^^^^^ > ada3: Command Queueing enabled > ada3: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) > ada3: Previously was known as ad10 > # pciconf -lcvb > ahci0 at pci0:0:31:2: class=0x010601 card=0x35ae8086 > chip=0x1d028086 rev=0x06 hdr=0x00 > vendor = 'Intel Corporation' > device = 'Patsburg 6-Port SATA AHCI Controller' > class = mass storage > subclass = SATA > bar [10] = type I/O Port, range 32, base 0x2070, size 8, enabled > bar [14] = type I/O Port, range 32, base 0x2060, size 4, enabled > bar [18] = type I/O Port, range 32, base 0x2050, size 8, enabled > bar [1c] = type I/O Port, range 32, base 0x2040, size 4, enabled > bar [20] = type I/O Port, range 32, base 0x2020, size 32, enabled > bar [24] = type Memory, range 32, base 0xd0b00000, size 2048, enabled > cap 05[80] = MSI supports 1 message enabled with 1 message > cap 01[70] = powerspec 3 supports D0 D3 current D0 > cap 12[a8] = SATA Index-Data Pair > cap 13[b0] = PCI Advanced Features: FLR TP > > Thanks for any insight provided.Intel Patsburg is otherwise known as Intel X79. The X79 chipset/southbridge offers 6 SATA ports, 2 of which are SATA600, and the remaining 4 are SATA300: http://en.wikipedia.org/wiki/Intel_X79 The intention of this was to offer 2 ports for people wanting to use SSDs (which tend to throttle themselves based on negotiated PHY speed), and a remaining 4 ports for MHDDs or ATAPI. You can, of course, use whatever ports for whatever you want. More importantly (I think): your devices are MHDDs and will never be able to reach SATA600 (or SATA300) speeds. Pure MHDDs which use SATA600 PHYs are somewhat of a marketing gimmick (but my gut feeling is that the MHDD vendors are choosing to narrow the number of on-disk SATA controllers they use). Hybrid HDDs may benefit from faster PHYs. Next, this statement by ahci(4) then confuses the user:> ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supportedYou see, when AHCI was invented, the existing idea was that all ports would have the same speed (and that was the case at the time). Only somewhat recently have some vendors begun to mix-match speeds on the same controller -- like this one. The AHCI specification probably (I have not read it even recently) only provides a number indicating "the total number of ports" followed by a single number indicating "the speed". There may be support somewhere within AHCI to provide an updated way to get more granular information, but I do not know if that's the case. If there is, FreeBSD's ahci(4) driver does not support such at this time (see sys/dev/ahci/ahci.c around line 502 for the device_printf() call and what the arguments are (specifically AHCI_CAP_ISS and AHCI_CAP_NPMASK)). TL;DR -- Your motherboard offers 6 ports, 2 of which are SATA600, 4 of which are SATA300, and despite the line shown above by FreeBSD not matching reality, everything is working as designed. -- | Jeremy Chadwick jdc at koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Making life hard for others since 1977. PGP 4BD6C0CB |
On Thu, Jun 27, 2013 at 6:38 PM, Jeremy Chadwick <jdc at koitsu.org> wrote:> > Intel Patsburg is otherwise known as Intel X79. The X79 > chipset/southbridge offers 6 SATA ports, 2 of which are SATA600, and the > remaining 4 are SATA300: > > http://en.wikipedia.org/wiki/Intel_X79 > >While Wikipedia correctly says Intel X79 is codenamed Patsburg, most Patsburgs are actually known as the C60x family of chipsets. X79 pairs with a Core i7 while the C60x pairs with a Xeon E5. ark.intel.com is a very good decoder ring for all of the Intel code names. http://ark.intel.com/products/codename/29968/Patsburg -Jim