From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Warr Subject: Re: Found an interesting device Date: Thu, 12 Dec 2013 09:28:25 -0600 Message-ID: <52A9D619.50504@warr.net> References: <52A9D4C9.7020801@warr.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from smtprelay0229.hostedemail.com ([216.40.44.229]:60141 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751530Ab3LLP21 (ORCPT ); Thu, 12 Dec 2013 10:28:27 -0500 Received: from filter.hostedemail.com (ff-bigip1 [10.5.19.254]) by smtprelay01.hostedemail.com (Postfix) with ESMTP id DCCDC235AE for ; Thu, 12 Dec 2013 15:28:26 +0000 (UTC) Received: from atlas.themelon.org (cpe-173-172-11-43.tx.res.rr.com [173.172.11.43]) (Authenticated sender: jason@warr.net) by omf09.hostedemail.com (Postfix) with ESMTPA for ; Thu, 12 Dec 2013 15:28:25 +0000 (UTC) In-Reply-To: <52A9D4C9.7020801@warr.net> Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-bcache@vger.kernel.org To: "linux-bcache@vger.kernel.org" On 12/12/2013 09:22 AM, Jason Warr wrote: > Some of you may be interested in this PCIe card: > > http://www.addonics.com/products/ad4mspx2.php > > I just received a couple of them and have done basic functionality > testing. No bcache yet but that is what they are intended for. The > controller is a Marvell 88SE9230 connected via an x2 link. > > 03:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9230 PCIe > SATA 6Gb/s Controller (rev 10) > LnkCap: Port #0, Speed 5GT/s, Width x2, ASPM L0s L1, > Latency L0 <512ns, L1 <64us > ClockPM- Surprise- LLActRep- BwNot- > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- > CommClk+ > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 5GT/s, Width x2, TrErr- Train- SlotClk+ > DLActive- BWMgmt- ABWMgmt-- > Kernel driver in use: ahci > Kernel modules: ahci > > [8:0:0:0] disk ATA MKNSSDAT120GB-DX 521A /dev/sde > [9:0:0:0] disk ATA MKNSSDAT120GB-DX 507A /dev/sdf Also this may or may not matter to anyone here but I was screwing around with it and you can hot-plug the mSATA cards onto it just fine. At least with those particular Mushkin models but I believe it is supposed to be part of the spec that mSATA support all the features of regular SATA. > So you are theoretically limited to less than 1GB/s across PCIe but for > caching purposes I'm more interested in IOPS than raw bandwidth > anyways. Using "dd if=/dev/zero of=/dev/sdX bs=1M oflag=direct" I am > seeing ~380MB/s per device on 2 Mushkin MKNSSDAT120GB-DX concurrently. > Not the greatest test but it does show that they work OK. I am getting > Fedora 20 installed the way I want it and then the real testing will begin. > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html