When is sataIII actually sataIII?

[spamless at mail-on.us]

On 2018-11-01 03:59, Frank Leonhardt (M) wrote:
> On 1 November 2018 05:14:35 GMT+00:00, spamless at mail-on.us wrote:
>> Hi all,
>> I picked out, and put together some hardware for a new FreeBSD
>> powered box. I chose a WD blue drive I knew was pretty zippy.
>> But I was quite disappointed to discover that FreeBSD wouldn't
>> support it @6Gb.
>> The following output from dmesg(8):
>> GEOM: new disk ada0
>> ada0: <WDC WD10EZEX-75WN4A0 01.01A01> ACS-3 ATA SATA 3.x device
>> ada0: Serial Number WD-WCC6Y3CJCTDC
>> ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
>> ada0: Command Queueing enabled
>> ada0: 953869MB (1953525168 512 byte sectors)
>> 
>> My hardware supports it; both drive, and controller. Yet for
>> some reason FreeBSD will only *acknowledge* the capabilities.
>> Do I need to impose some quirk, or something.
>> 
>> Thanks!
> 
> That is saying it will do transfers at 300 Megabytes/second on the
> interface. You'll be lucky to get that from a WD desktop drive due to
> mechanical limitations. WD blues at 1Tb tend to do 125-150MBps tops,
> and the range released a couple of years back (2015?) seem slower than
> the previous generation, although the spindle speeds vary.
> 
> 6G vs. 3G is only interesting talking to silicone drives or a SATA 
> expander.
> 
> But an interesting question - why does it say SATA2 instead of SATA3?

Thanks for your reply, Frank!
Be that as it may. As platters go. I bought this 1Tb WD blue, because 
all
the stats for it indicated it was faster that all the major competitors,
and interestingly, faster than their "high-end" Black counterpart. I 
also
bought it, because it was quieter than all the others.
That said; given that the port it runs off of, and the drive is truly
a Sata 3 (3.1). Why won't FreeBSD treat it as such. Why does it penalize
the drive?
I have another Sata 3 drive on the second Sata 3 port, that FreeBSD
actually treats as what it is:
ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
ada1: <ST3000DM001-1CH166 CC47> ACS-2 ATA SATA 3.x device
ada1: Serial Number W1F55VT9
ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 2861588MB (5860533168 512 byte sectors)
ada1: quirks=0x1<4K>

note the "quirks" - is that good, or bad?

In the end, it appears that I have to purchase a slower rated (Sata 3) 
drive
to get FreeBSD to treat it as a Sata 3 drive? It makes no sense to me. 
Which
is why I came here; in hopes of finding out *why* it appears as it does. 
:)

Thanks again, Frank!

Oh! In case it matters; this is on 12 (CURRENT)

-- 
Chris out...