Date: Fri, 2 Nov 2018 12:04:25 +0800 From: Erich Dollansky <freebsd.ed.lists@sumeritec.com> To: spamless@mail-on.us Cc: "Frank Leonhardt (M)" <frank2@fjl.co.uk>, owner-freebsd-hardware@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: When is sataIII actually sataIII? Message-ID: <20181102120425.1eac52a6.freebsd.ed.lists@sumeritec.com> In-Reply-To: <96848c4e433f9c28a017bc467d10b232@mail-on.us> References: <032dec6a280136b4b80d77715b0b1b17@mail-on.us> <441037E6-67AD-49A9-9151-3F617A7AE1AE@fjl.co.uk> <96848c4e433f9c28a017bc467d10b232@mail-on.us>
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Hi, On Thu, 01 Nov 2018 06:45:59 -0700 spamless@mail-on.us wrote: > 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) > forget about the marketing bullshit. You might have a very basic problem: the cable. Just change cables randomly. If you see then changes on a drive, you have to expect that there is a problem with the cable. Erich
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