On 2018-11-01 03:59, Frank Leonhardt (M) wrote:
On 1 November 2018 05:14:35 GMT+00:00, spaml...@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...
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