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  • SQL's Rownumber with Linq-to-entities

    - by mariki
    I am converting my project to use EF and also want to covert stored procedures into Linq-to-entities queries. This my SQL query (simple version) that I have trouble to convert: SELECT CategoryID, Title as CategoryTitle,Description, LastProductTitle,LastProductAddedDate FROM ( SELECT C.CategoryID, C.Title,C.Description, C.Section, P.Title as LastProductTitle, P.AddedDate as LastProductAddedDate, ROW_NUMBER() OVER (PARTITION BY P.CategoryID ORDER BY P.AddedDate DESC) AS Num FROM Categories C LEFT JOIN Products P ON P.CategoryID = C.CategoryID ) OuterSelect WHERE OuterSelect.Num = 1 In words: I want to return all Categories (from Categories table) and title and date of addition of the product (from Products table) that was added last to this category. How can I achieve this using Entity frame work query? In most efficient way.

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  • How do I share a WiX fragment in two WiX projects?

    - by Randy Eppinger
    We have a WiX fragment in a file SomeDialog.wxs that prompts the user for some information. It's referenced in another fragment in InstallerUI.wxs file that controls the dialog order. Of course, Product.wxs is our main file. Works great. Now I have a second Visual Studio 2008 Wix 3.0 Project for the .MSI of another application and it needs to ask the user for the same information. I can't seem to figure out the best way to share the file so that changing the information requested will result in both .MSIs getting the new behavior. I honestly can't tell if a merge module, an .wsi (include) or a .wixlib is the right solution. I would have hoped to find a simple example of someone doing this but I have failed thus far. Edit: Based on Rob Mensching's wixlib blog entry, a wixlib may be the answer, but I am still searching for an example of how to do this.

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  • Silverlight Navigation using Mvvm-light(oobe)+MEF?

    - by deliberative assembly
    What is the best approach for navigating between UserControls/Pages(out of browser experience)? I'm fairly new to Silverlight and even newer to the mvvm pattern. How well does the Navigation Framework Integrate with the MVVM Light Toolkit? A snippet for general application flow control with the two would be great. The plan was to use the Navigation Framework for general flow or using Jeremy Likeness's approach to region management(http://csharperimage.jeremylikness.com/search/label/regions) and swapping out regions as needed. I've seen a few places mention replacing the Visual Root, but that sounded like a hack to me. Any advice, snippets, or a nudge in the general direction would be greatly appreciated. Thank you.

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  • WCF, net.tcp, and ASP.NET development server

    - by bryanjonker
    I'm setting up a net.tcp WCF service using instructions here: http://blogs.msdn.com/swiss_dpe_team/archive/2008/02/08/iis-7-support-for-non-http-protocols.aspx One of the steps says to do the following: "If you open the IIS7 management console and you look at the advance setting of our IIS7HostedService Web Application, you will see that in the Enabled Protocols section just http is defined. You now have to add net.tcp (separated by a comma), so that our service will be able to respond also to TCP requests." This is fine, but what if I want to use the Cassini / VS2010 ASP.NET development server to debug (hitting F5 or cntrl-F5)? I don't think there's a way to change the settings in that IIS. Or is there? Are other programmers just so awesome that they don't need to go through the debugger? Or do they use wsHttpBinding?

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  • DirectoryServices auth problem asp

    - by ChrisMuench
    Hello, I'm getting the following error [error] IIS://networth-web6/W3SVC/AppPools/netbasistest errorSystem.Runtime.InteropServices.COMException (0x80020006): Unknown name. (Exception from HRESULT: 0x80020006 (DISP_E_UNKNOWNNAME)) at System.DirectoryServices.DirectoryEntry.Invoke(String methodName, Object[] args) at ASP.nb_test_aspx._Render_control1(HtmlTextWriter __w, Control parameterContainer) [/error] any ideas? I know my username and password work just fine to rdp into the server. when use with this code. [code] <%@ Page Language="vb" % <%@ Import Namespace="System.Xml" % <%@ Import Namespace="System.Management" % <%@ Import Namespace="System.DirectoryServices" % <% Response.Write("") Dim AppPoolFullPath As String = "IIS://networth-web6/W3SVC/AppPools/netbasistest" Dim Username as String = "networth-web6\username" Dim Password as String = "password" Try Dim w3svc As New DirectoryEntry(AppPoolFullPath,Username,Password) w3svc.Username = Username w3svc.Password = Password w3svc.Invoke("Recycle", Nothing) Response.Write(AppPoolFullPath & "") Catch exc as exception Response.Write(AppPoolFullPath & " error"&exc.tostring()&"") End Try Response.Write("<p />-- done --") Response.Write("</BODY></HTML>") %> [/code]

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  • Page looks good in most browsers except in IE7...why

    - by reinhat
    Hi, The following page looks good in Firefox, Safari, Chrome, IE6 and IE8... but it looks bad in IE7. I don't have IE7 but I need to fix this issue because someone seen it in IE7 and it looks bad. Does anyone has any idea why this page renders different in IE7?...and what is the solution to make it display correctly? http://www.aetna.com/2009annualreport/mainBoard.html Problem: When you click on the "Board of Directors" or "Management Team" link and the listing table panel opens up, the far right third of the panel is getting cut off. Also some information appears to be missing in the cells. Thanks, Attila

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  • How to use JTA support in Tomcat 6 for Hibernate ?

    - by EugeneP
    They recommend using JTA transaction support in JEE environment. But how to configure JTA in Tomcat6 so that Hibernate Session could use it ? Starting with version 3.0.1, Hibernate added the SessionFactory.getCurrentSession() method. Initially, this assumed usage of JTA transactions, where the JTA transaction defined both the scope and context of a current session. Given the maturity of the numerous stand-alone JTA TransactionManager implementations, most, if not all, applications should be using JTA transaction management, whether or not they are deployed into a J2EE container. Based on that, the JTA-based contextual sessions are all you need to use.

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  • Visual C# 2008 Express connection to SQL Server 2008 Express problem

    - by Phil
    Hi guys, I have a problem with Visual C# 2008 express (SP1) connecting to SQL Server 2008 express. The "Add Connection" window (wherever initiated) doesn't list existing sql server and no option for sql server except a compact edition. Note that, I've got the VWD 2008 express (SP1) on the same machine which shows the window regularly (with SQL server listed) and SQL Server Management studio works fine with the server as well. I've seen other similar posts, did take some advices: reinstalled the VC#, services run ok, etc... but with no success with VC# so far. Again, on the same machine the VWD shows the dialog with sql server option regularly, but VC# shows only 3 options in "Change data source" dialog (1. Microsoft Access Database File (OLE DB) 2. Microsoft SQL Server Compact 3.5, 3. Microsoft SQL Server Database File) Any idea? Thanks in advice, Phil

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  • Django auth without "auth_*" tables

    - by Travis Jensen
    We would like to use our own tables for user management instead of the Django "auth" tables. We already have database tables that include all of the relevant information our application needs but it isn't in the Django format. We would prefer not to have the information duplicated in two tables. We would like to utilize the auth package, though, as there is some very nice functionality that we don't want to replicate. I realize we could build our own auth backend, but that doesn't, as far as I can tell, remove the need for two sets of tables in this case. Am I correct in assuming that we cannot do this? I have found no docs that discuss how to modify the underlying model that the auth package is using. The backend simply pre-populates the user object that would eventually be saved in the auth tables. Thanks!

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  • Stop the screen saver and hibernation temporarily in VB.Net

    - by Tim Santeford
    I have a very long running syncronization task that cannot be interrupted by the screen saver or aggressive power saving modes. I want to make a single api call to stop power save mode and then restore it once the task is done. The following code is peaced together from various other posts but it has no effect on XP's power management settings. What am I doing wrong? TIA! Private Declare Function SetThreadExecutionState Lib "kernel32" (ByVal esFlags As Long) As Long Public Enum EXECUTION_STATE As Integer ES_CONTINUOUS = &H80000000 ES_DISPLAY_REQUIRED = &H2 ES_SYSTEM_REQUIRED = &H1 ES_AWAYMODE_REQUIRED = &H40 End Enum Public Shared Sub PowerSaveOff() SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED Or EXECUTION_STATE.ES_CONTINUOUS) End Sub Public Shared Sub PowerSaveOn() SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS) End Sub Here are the systems screensaver and powermode settings:

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  • Tree View WIKI replacement solution for SharePoint like Confluence?

    - by Melih Öztürk
    Hi to all, I keep my Process Documents on SVN and I want to create a Wiki page includes the information about these files. We use SharePoint in the company for basic document sharing and team sites. As it is mentioned in http://stackoverflow.com/questions/256407/what-are-your-biggest-complaints-about-sharepoint SharePoint Wiki lacks of usability. I need an easy to use wiki tool which is capable of showing the content like WikiPedia contents and it would be great if I could have the SharePoint tree view and Active Directory authentication also. I googled it and found Atlassian's Confluence and it seems that this product is capable of the requirements. We use Jira for issue tracking, so we can use it's reporting in dashboards. I need and it has a Wiki part which displays wiki pages in tree view. It should be like Does anyone used Confluence or have an idea for other products which meets my requirements

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  • Using a Generic Repository pattern with fluent nHibernate

    - by alex
    I'm currently developing a medium sized application, which will access 2 or more SQL databases, on different sites etc... I am considering using something similar to this: http://mikehadlow.blogspot.com/2008/03/using-irepository-pattern-with-linq-to.html However, I want to use fluent nHibernate, in place of Linq-to-SQL (and of course nHibernate.Linq) Is this viable? How would I go about configuring this? Where would my mapping definitions go etc...? This application will eventually have many facets - from a WebUI, WCF Library and Windows applications / services. Also, for example on a "product" table, would I create a "ProductManager" class, that has methods like: GetProduct, GetAllProducts etc... Any pointers are greatly received.

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  • Sumproduct using Django's aggregation

    - by Matthew Rankin
    Question Is it possible using Django's aggregation capabilities to calculate a sumproduct? Background I am modeling an invoice, which can contain multiple items. The many-to-many relationship between the Invoice and Item models is handled through the InvoiceItem intermediary table. The total amount of the invoice—amount_invoiced—is calculated by summing the product of unit_price and quantity for each item on a given invoice. Below is the code that I'm currently using to accomplish this, but I was wondering if there is a better way to handle this using Django's aggregation capabilities. Current Code class Item(models.Model): item_num = models.SlugField(unique=True) description = models.CharField(blank=True, max_length=100) class InvoiceItem(models.Model): item = models.ForeignKey(Item) invoice = models.ForeignKey('Invoice') unit_price = models.DecimalField(max_digits=10, decimal_places=2) quantity = models.DecimalField(max_digits=10, decimal_places=4) class Invoice(models.Model): invoice_num = models.SlugField(max_length=25) invoice_items = models.ManyToManyField(Item,through='InvoiceItem') def _get_amount_invoiced(self): invoice_items = self.invoiceitem_set.all() amount_invoiced = 0 for invoice_item in invoice_items: amount_invoiced += (invoice_item.unit_price * invoice_item.quantity) return amount_invoiced amount_invoiced = property(_get_amount_invoiced)

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  • What happens if my IExceptionPublisher throws an Exception?

    - by Graphain
    Hi, I'm using the .NET Exception Management Application Block (EMAB). As part of this I am implementing IExceptionPublisher classes. However, I am wondering what happens if these publishers encounter an Exception. I had a bit of a look around and apparently they are meant to do something like this: try { /* Normal Exception Publishing */ } catch { ExceptionManager.PublishInternalException(exception, additionalInfo); } Source: One caveat: what happens if there is an exception in our custom publisher code, preventing the publishing to MSMQ? For that, we turn to the ExceptionManager.PublishInternalException method, which will publish the exception to the default publisher, which is the Windows application event log. However, PublishInternalException is both protected and internal so I would have to be implementing ExceptionManager, not IExceptionPublisher, to access it.

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  • CakePHP: shortcomings with indirectly associated models

    - by Dan
    I'm having some issues with dealing with indirectly associated models in cakephp. My current model setup is as follows: Deliveries hasOne License License belongsTo Delivery License hasAndBelongsToMany Product (and vice-versa) License hasAndBelongsToMany ProductOption (and vice-versa) I'm trying to save information about ALL of these models inside ONE form. The shortcomings I'm running into are the following: The form helper only seems able to see the field type one level deep. saveAll() only seems able to save records one level deep (for multiple model forms). I'm searching everywhere for the solutions to these issues, but since I'm new to CakePHP, I'm not sure what the newest methods or "correct" methods are for dealing with these issues. Any advice is much appreciated. Thank you all! EDIT: I've posted code to my failed attempt here: http://bin.cakephp.org/saved/58501

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  • Difference between performSelectorInBackground and NSOperation Subclass

    - by AmitSri
    I have created one testing app for running deep counter loop. I run the loop fuction in background thread using performSelectorInBackground and also NSOperation subclass separately. I am also using performSelectorOnMainThread to notify main thread within backgroundthread method and [NSNotificationCenter defaultCenter] postNotificationName within NSOperation subclass to notify main thread for updating UI. Initially both the implementation giving me same result and i am able to update UI without having any problem. The only difference i found is the Thread count between two implementations. The performSelectorInBackground implementation created one thread and got terminated after loop finished and my app thread count again goes to 1. The NSOperation subclass implementation created two new threads and keep exists in the application and i can see 3 threads after loop got finished in main() function. So, my question is why two threads created by NSOperation and why it didn't get terminated just like the first background thread implementation? I am little bit confuse and unable to decide which implementation is best in-terms of performance and memory management. Thanks

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  • Generated SQL with PredicateBuilder, LINQPad and operator ANY

    - by Sig. Tolleranza
    I previously asked a question about chaining conditions in Linq To Entities. Now I use LinqKit and everything works fine. I want to see the generated SQL and after reading this answer, I use LinqPad. This is my statement: var predProduct = PredicateBuilder.True<Product>(); var predColorLanguage = PredicateBuilder.True<ColorLanguage>(); predProduct = predProduct.And(p => p.IsComplete); predColorLanguage = predColorLanguage.And(c => c.IdColorEntity.Products.AsQueryable().Any(expr)); ColorLanguages.Where(predColorLanguage).Dump(); The code works in VS2008, compile and produce the correct result set, but in LinqPad, I've the following error: NotSupportedException: The overload query operator 'Any' used is not Supported. How can I see the generated SQL if LINQPad fails?

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  • Bulk email notifications API for social networking site

    - by goombaloon
    I'm looking to build a social networking site that notifies followers of a particular user when new content has been posted by that user. Since the hope is that the site will eventually have thousands of users with thousands of followers, I'd prefer to use an outside product/service to send the emails rather than building the functionality into the application and dealing with scalability issues. I've looked at MailChimp and a few others out there. Since my use case isn't really email campaigns, these providers don't seem like the right solution. In fact, MailChimp support confirmed for me that my scenario doesn't fit for them. I'm sure others have run into this same requirement. What are others out there using? I'm using .NET so would like to target something that has a .NET wrapper if possible. Any advice would be most appreciated!

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  • my jQuery codes suspected to fail on IE 7

    - by Kyle
    I have received numerous calls from users lately, stating that they are not able to access the conference sites with IE7. These sites are created from a template, and they are managed on Joomla. Previously on other sites, there have no problems or complaints. However, with the recent complaints , I suspect that the culprit is my simple jQuery codes since the sites that have been reported have been created recently and incorporated with jQuery features. Site A (does not contain any jQuery): digitalmediaroi.net Site B (With recent complaints that fails to load on certain IE7): http://brownfieldscanada.com/ These are the jQuery codes that are running concurrently on a page. Are they using too much memory, therefore causing a problem on IE 7 ? <span id="alertTxt" style="text-align:center;display:none"><span style="color:#CC0000; font-weight:bold;">ALERT:</span> Municipalities, Developers, Owners, QPs, Consultants, Lawyers, Service Providers</span> <span id="alertTxt2" style="text-align:center; font-weight:bold; display:none">This high-level summit is specifically designed for YOU!</span> <span id="alertTxt3" style="text-align:center; font-weight:bold; display:none; color:#184b26;">Don't miss our Ground Water Protection, Shallow Soil and Waterfront Properties Workshop</span> <span id="alertTxt4" style="text-align:center; font-weight:bold; display:none"><a href="register/registeronline.html" title="Register for the Transforming &amp; Revitalizing Downtowns Summit!" style="font-family:ariel, helvetica, san-serif; color:#000099; text-decoration:underline;">Online registration now available!</a></span> <script type="text/javascript"> function animateTxt() { $j("#alertTxt").fadeIn(2000).delay(6000).fadeOut(1500, function() { $j("#alertTxt2").fadeIn(2000).delay(3000).fadeOut(1500,function(){ $j("#alertTxt3").fadeIn(2000).delay(6000).fadeOut(1500,function(){ $j("#alertTxt4").delay(500).fadeIn(2000).delay(4000).fadeOut(1500,function(){ animateTxt();}); }); }); }); } animateTxt(); </script> <script type="text/javascript">// <![CDATA[ var imgs1 = new Array("http://www.brownfieldscanada.com/images/brown-images/sponsors/intrinsik.jpg", "http://www.brownfieldscanada.com/images/brown-images/sponsors/stantec.jpg"); var imgs1_alt = new Array("Intrinsik - Sponsor of Ontario Brownfields Regulatory Summit", "Stantec - Sponsor of Ontario Brownfields Regulatory Summit"); var sponsor_names = new Array("Sponsor:","Sponsor:"); var lnks1 = new Array("http://www.intrinsikscience.com/", "http://www.stantec.com/"); var currentAd1 = 0; var imgCt1 = imgs1.length; function cycle1() { if (currentAd1 == imgCt1) { currentAd1 = 0; } var banner1 = document.getElementById('adBanner1'); var link1 = document.getElementById('adLink1'); banner1.src=imgs1[currentAd1]; banner1.alt=imgs1_alt[currentAd1]; link1.href=lnks1[currentAd1]; document.getElementById('sponsorheader').innerHTML = sponsor_names[currentAd1]; $j("#adBanner1").fadeIn(2000).delay(5000).fadeOut(1500, function(){ currentAd1++; cycle1(); }); } cycle1(); // ]]></script> <script type="text/javascript">// <![CDATA[ var partner_img = new Array("http://www.brownfieldscanada.com/images/brown-images/partners/BuildingLogo-2.jpg", "http://www.brownfieldscanada.com/images/brown-images/partners/NRU-Publishing_logo.jpg", "http://www.brownfieldscanada.com/images/brown-images/partners/haz_mat.jpg", "http://www.brownfieldscanada.com/images/brown-images/partners/oppi_logo_blue_with_tag.jpg", "http://www.brownfieldscanada.com/images/brown-images/partners/renew_logo.jpg", "http://www.brownfieldscanada.com/images/brown-images/partners/DCN.jpg"); var partner_lnks = new Array("http://www.building.ca/", "http://www.nrupublishing.com/", "http://www.hazmatmag.com/", "http://www.ontarioplanners.on.ca/", "http://renewcanada.net/", "http://www.dailycommercialnews.com/"); var partner_alt = new Array("Building.ca - Parter for Ontario Brownfields Regulatory Summit", "NRU Publishing - Partner for Ontario Brownfields Regulatory Summit", "HazMat Management Magazine - Partner for Ontario Brownfields Regulatory Summit", "The Ontario Professional Planners Institute - Partner for Ontario Brownfields Regulatory Summit", "Renew Canada - Partner for Ontario Brownfields Regulatory Summit", "Daily Commercial News and Construction Record - Partner for Ontario Brownfields Regulatory Summit"); var partner_title = new Array("Real Estate Development • Construction • Architecture", "NRU Publishing", "HazMat Management Magazine", "The Ontario Professional Planners Institute", "ReNew Canada", "Daily Commercial News and Construction Record"); var partner_name = new Array("Partner:","Partner:","Partner:","Partner:","Partner:", "Partner:"); var partner_num = 0; var partner_total = 6; function partnerCycle() { if (partner_num == partner_total) { partner_num = 0; } var partnerBanner = document.getElementById('partnerBanner'); var link1 = document.getElementById('partnerLink'); partnerBanner.src=partner_img[partner_num]; partnerBanner.alt=partner_alt[partner_num]; document.getElementById('partnerLink').href=partner_lnks[partner_num]; document.getElementById('partnerLink').title=partner_title[partner_num]; document.getElementById('partnerheader').innerHTML="<strong>"+partner_name[partner_num]+"</strong>"; $j("#partnerBanner").fadeIn(2000).delay(3000).fadeOut(1500, function(){ partner_num++; partnerCycle(); }); } partnerCycle(); // </script>

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  • Access Control Lists basics

    - by vtortola
    Hi, I'm gonna add authorization, user and groups management to my application, basically... you will can define a set of permissions for a concrete user or group. For example, you could specify whom can use a concrete resource. So I want to ensure that my assumptions about ACLs are right: A basic rule could be "Grant", "Deny", "NoSet". User permissions have priority over group permissions. "Deny" statement has priority over "Grant". For example, user "u1" belongs to group "A", the resource "X" has this ACL "u1:grant,A:deny" user "u1" should be able to access the resource, shouldn't it? If a resource has no ACL set... does it means that anyone can access it? should I provide a default ACL? Any document about ACL in a general way? Cheers.

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  • Can iTextSharp export to JPEG?

    - by SkippyFire
    I need to be able to export PDF's that I am creating to JPEG, so that users can have a screenshot/thumbnail of the end product, which is faster than opening the whole PDF. I am running this on an ASP.NET website running in Medium Trust in the Rackspace Mosso Cloud. I have yet to find a library that will either work in Medium trust, or in the case of ABC PDF, which works great locally, wont load in Mosso. Maybe Mosso has a custom trust level? I know that iTextSharp works on Mosso, but I haven't been able to figure how to "screenshot" a single page of a PDF, or export a page to JPEG. Is there anyone out there who has done this before?

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  • Render html code in sql server client report (rdlc)

    - by masoud ramezani
    I am using the asp.net web application and microsoft visual studio reportviewer control and rdlc for creating a report ( not using sql server reporting). I used the Product table to view the result. It has five fields and I display all the itemsin the report. One field is Description and it store the html code as the value(eg: <div><ul><li>a</li><li>b</li></ul><b>aaaa</b></div> ). I want to disply the output of this html code in my report's description field. But in my report, it shows the html value that I stored in my table (: <div><ul><li>a</li><li>b</li></ul><b>aaaa</b></div> ). How can I render the html in my report. Please give me a solution.

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  • Books about the philosophy of software development

    - by anon
    The first time I read The Mythical Man Month, I found the book utterly boring, a waste of my time, and thought it was written by some management guru that never wrote a line of code. A few years later, I realized Fred Brooks won the Turing award. Some years after that, after a few large development projects, I started understanding what he was talking about. Are there any other books about software development on a meta/philosophical level—not in the sense of design patterns, templates, or even lisp macros—but at a level where ideas are expressed without code?

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  • Recommendations for keeping a build server updated

    - by gareth_bowles
    As a guy who frequently switches between QA, build and operations, I keep running into the issue of what to do about operating system updates on the build server. The dichotomy is the same on Windows, Linux, MacOS or any other o/s that can update itself via the internet: The QA team wants to keep the build server exactly as it is from the beginning of the product release cycle to the end, since installing updates could destabilize the server and means that successive builds aren't made against the same baseline. The ops team wants the software to be deployed on a system with all the latest security patches; this can mean that the software isn't deployed on exactly the same version of the o/s that it was built on. I usually mitigate this by taking release candidate builds and installing them on a test server that has a completely up-to-date o/s, repeating the automated tests that are run on the build server and doing some additional system level testing to make sure everything looks good before deployment. However, this seems inefficient to me; does anyone have a better way ?

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  • 2-Bay External HDD Enclosure in JBOD mode fails to detect both drives (Linux & Windows)

    - by mgc8888
    I recently purchased a couple of USB 3.0 External HDD Enclosures to use for storage and backup; the idea was to have one act as backup to the other, with 4 x 3TB drives in total. However, the second drive in each is not accessible in either Linux nor Windows, and I could not determine the reason. 1. Situation The two enclosures are slightly different (couldn't find them in stock at the same time) yet from many little details appear to be the same Chinese base design with a tweaked outer shell. The models are: Sharkoon 2-Bay RAID Box Fantec MR-35DU3 The drives are Seagate 3TB Barracuda ST33000651AS, firmware CC44, all identical. From reading manuals and online sources, I determined that JBOD would be the optimal setup for my needs -- addressing the two drives separately in each enclosure would be important, making it easy to swap drives and mix&match them if needed; all the other modes implied the controller doing a combination of the drives. The software used was Debian GNU/Linux - testing/wheezy - kernel 2.6.39-2 and Windows 7 Ultimate. 2. Description of the problem Now, here comes the problem: every time I connect either of the enclosures to a PC using the supplied cable (tried a different one as well), only the HDD in the top bay is readable, the one below is detected yet errors out in various ways. According to the manuals, it should not happen: in JBOD, the system should be able to "see" two separate drives upon connection. This happens with both enclosures and any combination of HDDs (i.e. if I swap them, the same thing happens), so the HDDs are good and I think so are the enclosures (two different companies making similar products that failed in an identical fashion would be very unlikely). The top HDD can be used fine every time, I actually tried a speed test from Linux and got about 150MiB/s reads, so all is working as it should; the one below refuses to work every time. So the failure is consistent. To make sure this was not some obscure Linux bug, I tried the same under Windows 7, and the system also only created one drive letter for a drive of 3TB size (so it was only seeing one instead of both). Placing an older, known good, 2TB drive in the top bay made that the one recognised, so we have the same issue under Windows as well. Log entries under Linux (tested here with a 3TB and a 2TB drive so I could differentiate them; either one works in the top enclosure, in the test setup the 3TB one is on top). You can see them being detected, the top one is ok, but for the bottom one only errors: Jul 19 23:28:15 media kernel: [260150.582436] usb 6-1: New USB device found, idVendor=1ca1, idProduct=18ae Jul 19 23:28:15 media kernel: [260150.582440] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jul 19 23:28:15 media kernel: [260150.582442] usb 6-1: Product: Usb Sata Bridge Jul 19 23:28:15 media kernel: [260150.582444] usb 6-1: Manufacturer: SYMWAVE Jul 19 23:28:15 media kernel: [260150.582446] usb 6-1: SerialNumber: 39584B304C4E3441 Jul 19 23:28:15 media kernel: [260150.870412] scsi11 : usb-storage 6-1:1.0 Jul 19 23:28:16 media kernel: [260151.882087] scsi 11:0:0:0: Direct-Access SYMWAVE ST33000651AS CC44 PQ: 0 ANSI: 4 Jul 19 23:28:16 media kernel: [260151.882242] scsi 11:0:0:1: Direct-Access SYMWAVE ST32000641AS CC12 PQ: 0 ANSI: 4 Jul 19 23:28:16 media kernel: [260151.882677] sd 11:0:0:0: Attached scsi generic sg2 type 0 Jul 19 23:28:16 media kernel: [260151.882774] sd 11:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16). Jul 19 23:28:16 media kernel: [260151.882857] sd 11:0:0:1: Attached scsi generic sg3 type 0 Jul 19 23:28:16 media kernel: [260151.882893] sd 11:0:0:0: [sdb] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB) Jul 19 23:28:16 media kernel: [260151.883085] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.883582] sd 11:0:0:0: [sdb] Write Protect is off Jul 19 23:28:16 media kernel: [260151.883961] sd 11:0:0:1: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) Jul 19 23:28:16 media kernel: [260151.884145] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.884570] sd 11:0:0:1: [sdc] Write Protect is off Jul 19 23:28:16 media kernel: [260151.884855] sd 11:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16). Jul 19 23:28:16 media kernel: [260151.885286] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.885807] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.909595] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.910159] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.910163] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.910167] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.910169] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.910172] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.910182] quiet_error: 2 callbacks suppressed Jul 19 23:28:16 media kernel: [260151.910570] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.911153] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.911156] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.911159] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.911161] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.911164] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.911385] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.911902] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.911905] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.911908] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.911910] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.911913] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.912128] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.912650] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.912653] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.912656] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.912657] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.912660] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.912876] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.913439] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.913442] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.913445] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.913446] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.913449] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.945227] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.945863] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.945866] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.945870] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.945871] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.945875] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 (...) and so on for like 10 seconds until it gives up (...) 3. Question So, my question would be: what is causing this? Am I missing something, should I configure things differently, is this a known limitation? Searching online for more information did not yield any useful results... Thank you in advance for any help!

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