Date: Thu, 01 Nov 2018 06:45:59 -0700 From: spamless@mail-on.us To: "Frank Leonhardt (M)" <frank2@fjl.co.uk> Cc: freebsd-hardware@freebsd.org, owner-freebsd-hardware@freebsd.org Subject: Re: When is sataIII actually sataIII? Message-ID: <96848c4e433f9c28a017bc467d10b232@mail-on.us> In-Reply-To: <441037E6-67AD-49A9-9151-3F617A7AE1AE@fjl.co.uk> References: <032dec6a280136b4b80d77715b0b1b17@mail-on.us> <441037E6-67AD-49A9-9151-3F617A7AE1AE@fjl.co.uk>
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On 2018-11-01 03:59, Frank Leonhardt (M) wrote: > On 1 November 2018 05:14:35 GMT+00:00, spamless@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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