Date: Sun, 22 Jul 2007 00:10:12 -0300 From: "Marc G. Fournier" <freebsd@hub.org> To: Dan Nelson <dnelson@allantgroup.com>, Tim Daneliuk <tundra@tundraware.com>, freebsd-stable@freebsd.org Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: SATA 300 Drive Being Run At 150 Message-ID: <1431AA268771E71884A824C3@fserv.hub.org> In-Reply-To: <20070721165539.GA2579@dan.emsphone.com> References: <46A22253.8080100@tundraware.com> <20070721165539.GA2579@dan.emsphone.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - --On Saturday, July 21, 2007 11:55:39 -0500 Dan Nelson <dnelson@allantgroup.com> wrote: > In the last episode (Jul 21), Tim Daneliuk said: >> I asked this question a while back, but needed to do more digging to make >> sure I had latest sources etc. >> >> I have an Intel motherboard that shows this for a SATA controller: >> >> atapci1: <Intel ICH7 SATA300 controller> port >> 0x20c8-0x20cf,0x20ec-0x20ef,0x20c0-0x20c7,0x20e8-0x20eb,0x20a0-0x20af mem >> 0x90204000-0x902043ff irq 19 at device 31.2 on pci0 >> >> But the hard drive - a SATA 300 device - shows up like this: >> >> ad4: 238475MB <WDC WD2500JS-00NCB1 10.02E02> at ata2-master SATA150 >> ^^^^^^^ >> Using dd, I have confirmed that the drive is running nowhere near >> SATA-III speeds, at least on reads: >> >> 968470075 bytes transferred in 7.132891 secs (135775249 bytes/sec) > > What was your dd commandline? If you've got more than 1GB of RAM and > tested by reading a file and not the raw device itself, you just tested > FreeBSD buffer cache. According to > http://www.wdc.com/en/products/productspecs.asp?driveid=135 , that > drive's maximum sustained speed is only 93.5 MB/sec, so it doesn't > really matter if your interface is running at SATA150 or SATA300 unless > you plan on reading exclusively from its 8MB buffer :) 'k, I just bought a new desktop, SATA/300MB/s interface, and this drive: <http://www.wdc.com/en/products/products.asp?DriveID=254>; Web site states 3Gb/s ... I'm seeing same SATA!50: atapci0: <JMicron JMB361 SATA300 controller> port 0xbf00-0xbf07,0xbe00-0xbe03,0xbd00-0xbd07,0xbc00-0xbc03,0xbb00-0xbb0f mem 0xfdbfe000-0xfdbfffff irq 16 at device 0.0 on pci2 atapci1: <Intel ICH8 SATA300 controller> port 0xfa00-0xfa07,0xf900-0xf903,0xf800-0xf807,0xf700-0xf703,0xf600-0xf60f,0xf500-0xf50f irq 19 at device 31.2 on pci0 atapci2: <Intel ICH8 SATA300 controller> port 0xf300-0xf307,0xf200-0xf203,0xf100-0xf107,0xf000-0xf003,0xef00-0xef0f,0xee00-0xee0f irq 19 at device 31.5 on pci0 ad8: 152627MB <WDC WD1600AAJS-08PSA0 05.06H05> at ata4-master SATA150 Latest 6.x STABLE ... - ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email . scrappy@hub.org MSN . scrappy@hub.org Yahoo . yscrappy Skype: hub.org ICQ . 7615664 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFGosqU4QvfyHIvDvMRAhENAKDhq0K+IDbZvD9Lcm51aLTwzjhz9ACgnFZz b3iDMLhANYWByT3a7Vu3utQ= =ZnlY -----END PGP SIGNATURE-----
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