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• Diagnosing a BSOD involving USB

  - by David Ebbo

  [Running Win7 Ultimate 64 bit] My new HP Pavilion Elite HPE-450t has been plagued by BSDO crashes since I got it about 5 weeks ago. The crashes are somewhat rare, sometimes not occurring for 3 or 4 days. I have spent a lot of time trying to isolate the device that could be at fault, but I have seen crashes with only the keyboard and mouse plugged in (as USB devices), and I tried two sets of keyboard/mouse, so I'm running out of ideas. :( The WhoCrashed tool gave this info about my latest BSOD: crash dump file: C:\Windows\Minidump\121310-11887-01.dmp This was probably caused by the following module: usbport.sys (USBPORT+0x2DE4E) Bugcheck code: 0xFE (0x5, 0xFFFFFA8008F571A0, 0x80863B34, 0xFFFFFA80092F2510) Error: BUGCODE_USB_DRIVER file path: C:\Windows\system32\drivers\usbport.sys product: Microsoft® Windows® Operating System company: Microsoft Corporation description: USB 1.1 & 2.0 Port Driver Bug check description: This indicates that an error has occurred in a Universal Serial Bus (USB) driver. The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time. I looked at http://msdn.microsoft.com/en-us/library/ff560407(VS.85).aspx, and for Parameter1 = 0x5, it says "A hardware failure has occurred due to a bad physical address found in a hardware data structure. This is not due to a driver bug". Should I conclude that it's a hardware issue in the machine itself, rather than a bad USB driver or USB device? Here is the MiniDump, in case someone can get more info out of it: http://ewt52q.blu.livefilestore.com/y1peS4Ce8nSK1SXghzMDoxDWXlaEu-EKCJsv25y8y5DXXIUzZ9U0_tYgFJXd939fykwa0zRmx98IW0PYG18GioqKAuARYjtspSA/121310-11887-01.dmp?download&psid=2

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• Keep Windows Installer from using largest drive for temporary files

  - by stefan.at.wpf

  By default Windows Installer uses the largest drive for temporary storage, no matter if that's needed (meaning there would also be enough space on the system drive). Taken from http://msdn.microsoft.com/en-us/library/aa371372%28VS.85%29.aspx: During an administrative installation the installer sets ROOTDRIVE to the first connected network drive it finds that can be written to. If it is not an administrative installation, or if the installer can find no network drives, the installer sets ROOTDRIVE to the local drive that can be written to having the most free space. Now my system drive is an SSD, my largest drive is a RAID, that spins down when it's not used. Remember the SSD as system drive? Everything is silent now! Until I install something and Windows Installer wakes up my RAID again just to put a small .tmp file on it... How can I prevent Windows Installer from using the largest drive as temporary storage? Can I maybe set some access rights to disallow the Windows Installer to write on my RAID drive? Any other ideas? Thank you!

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• Reducing video mode switching during Linux boot

  - by Zack

  When I boot up my desktop computer, which only has Linux on it, the video mode and/or console font gets switched four times: When GRUB starts, it switches from 80x25 text to a graphical mode so it can draw a pretty background behind its menu; GRUB then goes back to 80x25 text after I pick something from the menu; When the KMS driver for my video card loads, it switches to a much higher-resolution text mode (I don't know if this is a hardware text mode or not); Finally X starts and it goes graphics and stays that way. I think this last switch does not change the resolution of the video mode, only the graphicalness. I'd like to get rid of as many of these mode switches as possible. Ideally, when GRUB takes over from the BIOS it would go directly to the same high-resolution text mode that the KMS driver selects, and the display would stay in that mode till X starts and brings up graphics. I am under the impression that this is possible by mucking with the kernel command line and/or the GRUB console module load parameters, but I don't know the details. GRUB 1.98+20100706, kernel 2.6.32.15 using Nouveau video drivers. Distro is Debian unstable. Please no answers that involve recompiling anything or cobbling together bleeding-edge kernel/driver combinations, I don't care enough about this to go to that much trouble. EDIT: Tobu suggests setting GRUB_GFXMODE to the full pixel resolution of the monitor, and GRUB_GFXPAYLOAD_LINUX=keep to avoid the mode switch after the menu goes away. This does part of what I want, but winds up being worse overall. There's no mode switch after the menu, but there's still a painfully-slow screen repaint (I should probably just give up on GRUB's gfxmode, it's waaaay too slow at 1920x1200). More seriously, there's now a double mode switch when nouveaufb loads, along with fun-looking error messages in dmesg [ 5.923798] [drm] nouveau 0000:02:00.0: allocated 1920x1200 fb: 0x40250000, bo ffff8801ba5f4600 [ 5.923802] fb: conflicting fb hw usage nouveaufb vs EFI VGA - removing generic driver [ 5.923821] [drm] nouveau 0000:02:00.0: PFIFO_INTR 0x00000010 - Ch 1 ("PFIFO_INTR" message repeats 400+ times) [ 5.925609] Console: switching to colour dummy device 80x25 [ 5.925802] Console: switching to colour frame buffer device 240x75

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• Update Grub on Squeeze - Kernel downgrade due VMware Server

  - by vodoo_boot

  Hi! I happen to run into various problems regarding grub and kernels. I don't really care about the kernel internas. All I want is VMware server in that dedicated root-server. 1.) What is a bzImage vs. vmlinuz? kaze:~# ls /boot/ System.map-2.6.32-5-amd64 bzImage-2.6.33.2 config-2.6.33.2 initrd.img-2.6.32-5-amd64 System.map-2.6.33.2 bzImage-2.6.35.6 config-2.6.35.6 vmlinuz-2.6.32-5-amd64 System.map-2.6.35.6 config-2.6.32-5-amd64 grub I updated my menu.lst (grub2): timeout 5 default 0 fallback 1 title 2.6.32.5 kernel (hd0,1)/boot/vmlinuz-2.6.32-5-amd64 root=/dev/sda2 panic=60 noapic acpi=off title 2.6.35.6 kernel (hd0,1)/boot//bzImage-2.6.35.6 root=/dev/sda2 panic=60 noapic acpi=off title 2.6.32.3 kernel (hd0,1)/boot//bzImage-2.6.33.2 root=/dev/sda2 panic=60 noapic acpi=off That doesn't do well... I think the vmlinuz file is missing initrd or so. Dunno. In fact I don't give too much about kernel boot voodoo as long as it works. update-grub(2) does not work. Does anybody know what magical trick there is to get the 2.6.32-5 booting? 2.) I thought t follow the Deban wiki.. I cannot get header-files for the installed 35.6 or 33.2 kernel in the repositories. I cannot build foreign headers because they will not match the running kernel. So how does one deal with that situtation? I'd prefer not to have to downgrade the kernel. Thanks for any answers!

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• Windows 7 taskbar groups to use vertical menus only, not thumbnails?

  - by Justin Grant

  I frequently have 10 or more windows of the same application (e.g. Outlook, Word, IE, etc.) open at one time. Windows 7's new taskbar grouping thumbnail feature shows a preview of open windows (aka thumbnails) when you single-click on the taskbar group for that application. But when I have over 10 windows open (more thumbnails than will fit horizontally on my screen), Windows reverts to a vertical menu. This is disconcerting since I need to train myself to deal with two separate behaviors and can never anticipate what I'm going to see when I click on a taskbar group. Furthermore, I find the thumbnails more difficult to visually scan through (vs. the vertical menu) because only 1-2 words of each window's title are shown. Typically that's not enough text to disambiguate and help me find the right window. I'd like to force Windows 7's taskbar grouping to always show a vertical menu (like in XP) instead of sometimes showing thumbnail previews and sometimes showing a vertical menu. Anyone know how (whether?) this can be done? UPDATE: BTW, I'm running the RTM version (build 7600) of Windows 7. There are apparently other solutions out there which work on earlier builds, but which don't work on the RTM build.

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• Can't create add a SQL Server user: The login already has an account under a different user name.

  - by Zian Choy

  Environment: SQL Server 2005 Express Windows 7 When I installed SQL Server, I followed the instructions at http://msdn.microsoft.com/en-us/library/aa905868.aspx to set my computer's admin account as the SQL Server admin. However, when I try to access a database on my computer through Visual Studio 2008, I get the following error message: --------------------------- Microsoft Visual Studio --------------------------- The database 'Parkinsons' does not exist or you do not have permission to see it. Would you like to attempt to create it? --------------------------- Yes No --------------------------- Then, if I go to SQL Server and add a user to that database, I get the following error message: TITLE: Microsoft SQL Server Management Studio Express ------------------------------ Create failed for User 'zian'. (Microsoft.SqlServer.Express.Smo) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=9.00.2047.00&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Create+User&LinkId=20476 ------------------------------ ADDITIONAL INFORMATION: An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.Express.ConnectionInfo) ------------------------------ The login already has an account under a different user name. (Microsoft SQL Server, Error: 15063) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=09.00.4053&EvtSrc=MSSQLServer&EvtID=15063&LinkId=20476 ------------------------------ BUTTONS: OK ------------------------------ Why doesn't VS piggy back on the dbo account? If the dbo account is unusable, then why won't SQL Server let me make an account so that I can access my own data?

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• How do I calculate clock speed in multi-core processors?

  - by NReilingh

  Is it correct to say, for example, that a processor with four cores each running at 3GHz is in fact a processor running at 12GHz? I once got into a "Mac vs. PC" argument (which by the way is NOT the focus of this topic... that was back in middle school) with an acquaintance who insisted that Macs were only being advertised as 1Ghz machines because they were dual-processor G4s each running at 500MHz. At the time I knew this to be hogwash for reasons I think are apparent to most people, but I just saw a comment on this website to the effect of "6 cores x 0.2GHz = 1.2Ghz" and that got me thinking again about whether there's a real answer to this. So, this is a more-or-less philosophical/deep technical question about the semantics of clock speed calculation. I see two possibilities: Each core is in fact doing x calculations per second, thus the total number of calculations is x(cores). Clock speed is rather a count of the number of cycles the processor goes through in the space of a second, so as long as all cores are running at the same speed, the speed of each clock cycle stays the same no matter how many cores exist. In other words, Hz = (core1Hz+core2Hz+...)/cores.

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• What is the best VM for developing WPF apps from within OS X?

  - by MarqueIV

  All of my machines are Macs (Mac Pro, MacBook Pro, MacBook Air and Mac Mini (and Apple TV 2.0 too! :) ) but for my day-job, I develop .NET/WPF applications. Normally I just boot into Boot Camp and develop that way, which of course works great, but there are times when I need to simultaneously get to things on my Mac-side of the equation, so I've bought both VMware 3.1 and Parallels 6. Both work, however, even on my Mac Pro where I paid to upgrade to the better video cards (the NVidia 8600s I think vs. the stock ATI cards) the WPF performance bites!! Now this confuses me since both boast that they support not only hardware-accelerated OpenGL 2.1, but also hardware-accelerated DirectX 9 (VMware even allegedly supports DirectX 10!) via their respective virtual drivers and both can run 3D games just fine, even in a window. But even the simple act of resizing a WPF window that has a tiled background results in some HIDEOUS repainting and resizing behaviors. It's damn near closer to what you'd expect over RDP let alone a software-only renderer (forget accelerated hardware completely!) So... can anyone please tell me WTF WPF is doing differently? More importantly, how can I speed up the WPF performance? Should I switch to VirtualBox that also has support for DirectX? Or am I just gonna have to 'byte' the bullet (sorry... had to. So I like puns! Thank Jon Stewart!) and continue using Boot Camp?

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• LDAP, Active Directory and bears, oh my!

  - by Tim Post

  What I have: Workstations running Ubuntu Jaunty mounting /home on a remote NFS server. User accounts are still created locally on each individual workstation. Workstations running Windows XP / Vista NFS server (as noted above) Windows 2008 server All machines share a single private network (LAN). What I need to accomplish: A single, intuitive (GUI driven) place for an office administrator to create user accounts. This should let anyone login to their (linux or windows) workstation, then fire up remote desktop and use the same login to the Windows 2008 server, from any machine on the network. I have read so much on samba, LDAP vs AD, etc and now I'm even more confused than I was before I began researching the problem. Ideally, Linux and Windows users should be able to get to their local files once logged into the Win2008 server. I am a programmer, not an interoperability guru and I'm completely lost on where to even start trying to accomplish this, plus I've run out of things to Google. How would you do this? Is it even possible?

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• Domain Controller DNS Best Practice/Practical Considerations for Domain Controllers in Child Domains

  - by joeqwerty

  I'm setting up several child domains in an existing Active Directory forest and I'm looking for some conventional wisdom/best practice guidance for configuring both DNS client settings on the child domain controllers and for the DNS zone replication scope. Assuming a single domain controller in each domain and assuming that each DC is also the DNS server for the domain (for simplicity's sake) should the child domain controller point to itself for DNS only or should it point to some combination (primary VS. secondary) of itself and the DNS server in the parent or root domain? If a parentchildgrandchild domain hierarchy exists (with a contiguous DNS namespace) how should DNS be configured on the grandchild DC? Regarding the DNS zone replication scope, if storing each domain's DNS zone on all DNS servers in the domain then I'm assuming a DNS delegation from the parent to the child needs to exist and that a forwarder from the child to the parent needs to exist. With a parentchildgrandchild domain hierarchy then does each child forward to the direct parent for the direct parent's zone or to the root zone? Does the delegation occur at the direct parent zone or from the root zone? If storing all DNS zones on all DNS servers in the forest does it make the above questions regarding the replication scope moot? Does the replication scope have some bearing on the DNS client settings on each DC?

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• Exchange 2010 DAG + VMWare HA = no support?

  - by Dan

  We currently have an Exchange 2003 clustered environment (two machine cluster) that we're looking to upgrade to 2010. We recently purchased a VMWare virtualization environment (three Dell R710's with an EMC NS-120 serving up NFS datastores - iSCSI is available) that we wish to use for this new environment. I'm seeing that Microsoft does not support Exchange 2010 DAGs with a virtualization high availability solution (see links below). I would like to utilize the DAG to ensure the data stays available if one host goes down, and HA to ensure that if the physical host goes down, the VM will come back up on the other available host. Does anybody know why MS does not support this? VMWare HA will only restart the VM if it is hung/down - I don't see any difference between this and restarting the physical box if someone pulled the power... Will we only run into issues with support if it has something to do with HA/DAG failover or will they see we have HA and tell us to put it on a physical box even if it has nothing to do with HA? If we disable HA for these VM's will that satisfy them on a support case? Has anybody set up an Exchange 2010 DAG on VMware with HA enabled? Will they have any issues with using an NFS datastore? We have much greater flexibility on the EMC with NFS vs iSCSI, so I would prefer to continue utilizing that. Thanks for any input! http://www.vmwareinfo.com/2010/01/verifying-microsoft-exchange-2010.html Take a look at the second image under "Not Supported" http://technet.microsoft.com/en-us/library/aa996719.aspx "Microsoft doesn't support combining Exchange high availability solutions (database availability groups (DAGs)) with hypervisor-based clustering, high availability, or migration solutions. DAGs are supported in hardware virtualization environments provided that the virtualization environment doesn't employ clustered root servers."

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• What is easiest no fail way to publish asp.net app?

  - by Maestro1024

  What is easiest no fail way to publish asp.net app? Sorry a bit of an open ended question but I am having issues deploying an asp.net report project and any solution to get the site up is fine. I am running Win7/SQL 2008 and want to publish a asp.net report site that I created in VS 2008. Website launches when I run in debug in Visual studio but I want to publish the site so that it can be seen on the LAN. I published the files off to a folder and started up the IIS manager and added a new site and pointed to that folder. Set the permission on the folder to share to everyone. However when I go to the DNS name I put in for the website it does not launch. Any ideas on this? I see websites out there talking about a web sharing tab on the folder properties but I do not see that when I go to folders. Why might that be? Another avenue I have not pursued yet is publishing directly to a website. Has anyone tried that? Is that better or worse than publishing to filesystem?

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• mysql INNODB inserts very slow

  - by 133794m3r

  The database's schema is as follows. CREATE TABLE `items` ( `id` mediumint( 8 ) unsigned NOT NULL AUTO_INCREMENT , `name` varchar( 45 ) NOT NULL , `main_type` tinyint( 4 ) NOT NULL , `rarity` tinyint( 4 ) NOT NULL , `stack_size` smallint( 6 ) NOT NULL , `sub_type` tinyint( 4 ) NOT NULL , `cost` mediumint( 8 ) unsigned NOT NULL , `ilvl` smallint( 6 ) unsigned NOT NULL DEFAULT '0', `flavor_text` varchar( 250 ) NOT NULL , `rlvl` tinyint( 3 ) unsigned NOT NULL , `final` tinyint( 4 ) NOT NULL DEFAULT '0', PRIMARY KEY ( `id` ) ) ENGINE = InnoDB DEFAULT CHARSET = ascii; Now, doing an insert on this table takes 0.22 seconds. I don't know why it's taking so long to do a single row insert. Reads are really really fast something like 0.005 seconds. With using the example configuration from here dev mysql innodb it averages ~0.002 to ~0.005 seconds. Why it takes more than 100x more time to do a single insert makes no sense to me. My computer is as follows. OS:Debian Sid x86-x64, Mysql 5.1, RAM:4GB ddr2, cpu 2.0Ghz dual core, HDD 7200RPM 32MB cache 640GB. Why it's taking almost 100x as much time for a SELECT * FROM items; vs INSERT INTO items ...; will never make any sense to me. It's still a small table at only 70 rows, and took that long even when it had 0 rows.

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• Optimizing Disk I/O & RAID on Windows SQL Server 2005

  - by David

  I've been monitoring our SQL server for a while, and have noticed that I/O hits 100% every so often using Task Manager and Perfmon. I have normally been able to correlate this spike with SUSPENDED processes in SQL Server Management when I execute "exec sp_who2". The RAID controller is controlled by LSI MegaRAID Storage Manager. We have the following setup: System Drive (Windows) on RAID 1 with two 280GB drives SQL is on a RAID 10 (2 mirroed drives of 280GB in two different spans) This is a database that is hammered during the day, but is pretty inactive at night. The DB size is currently about 13GB, and is used by approximately 200 (and growing) users a day. I have a couple of ideas I'm toying around with: Checking for Indexes & reindexing some tables Adding an additional RAID 1 (with 2 new, smaller, HDs) and moving the SQL's Log Data File (LDF) onto the new RAID. For #2, my question is this: Would we really be increasing disk performance (IO) by moving data off of the RAID 10 onto a RAID 1? RAID 10 obviously has better performance than RAID 1. Furthermore, SQL must write to the transaction logs before writing to the database. But on the flip side, we'll be reducing both the size of the disks as well as the amount of data written to the RAID 10, which is where all of the "meat" is - thereby increasing that RAID's performance for read requests. Is there any way to find out what our current limiting factor is? (The drives vs. the RAID Controller)? If the limiting factor is the drives, then maybe adding the additional RAID 1 makes sense. But if the limiting factor is the Controller itself, then I think we're approaching this thing wrong. Finally, are we just wasting our time? Should we instead be focusing our efforts towards #1 (reindexing tables, reducing network latency where possible, etc...)?

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• Unable to specify parameters to cvlc in a script

  - by VxJasonxV

  I'm creating a script that issues a few curl commands in order to access a time-protected mms stream link, then set up a relay using cvlc (vlc's command line interface) for my own use on an unencumbered player. The curl aspect of this is working, as I can run as a browser and curl side by side and get the same access url. (It's time locked meaning the stream will work forever, but you have to connect quickly or the URL will time out.) The very end of the script prints the command I will run, which is then followed up by "exec $CMD". When I echo $CMD I get: cvlc --sout '#standard{access=http,mux=asf,dst=0.0.0.0:58194}' mms://[...] Manually Copy/Pasting this command in, verbatim, works perfectly fine, but as part of a script, the cvlc execution output says: [0x9743d0] main interface error: no suitable interface module [0x962120] main libvlc error: interface "globalhotkeys,none" initialization failed [0x9743d0] dummy interface: using the dummy interface module... [0xb16e30] stream_out_standard stream out error: no mux specified or found by extension [0xb16ad0] main stream output error: stream chain failed for `standard{mux="",access="",dst="'#standard{access=http,mux=asf,dst=0.0.0.0:58194}'"}' [0xb11cd0] main input error: cannot start stream output instance, aborting [0xb11f70] signals interface error: Caught Interrupt signal, exiting... Why is --sout behaving one way in a script (non-interactive shell?) vs. another way in the foreground (interactive shell) ?

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• Deploying Windows Service through group policy fails with Event ID 102

  - by Sören Kuklau

  I'm trying to deploy a custom Windows Service (written in C#; installed through a VS setup project) using a group policy. To help debug this, I also have two additional MSIs in the same policy. All three packages are deployed as a machine policy, not a user one. On one machine (runs Windows Server 2008; no UAC), all three deploy fine. The service is set to Automatic, as expected. On two machines (run Windows 7; UAC), the two other MSIs deploy fine, but my service fails to install. The event log gives an event ID of 102, which appears to be a permissions problem: The install of application "Package Name" from policy "Policy Name" failed. The error was The installation source for this product is not available. Verify that the source exists and that you can access it. However, all three packages come from the same share linked through UNC, so this is unlikely. My guess is that UAC is the problem; that the service requires additional permissions. Do I need to alter the MSI somehow?

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• Why won't IIS serve my website? - 404 Page Not Found

  - by Giffyguy

  Built a brand new server, with a fresh copy of Windows Server 2003 Enterprise x86 Edition. Installed the .NET Framework 1.1, 2.0, 3.5, and 4.0 Added the "Domain Controller" and "Application Server" roles. Created a new website, pointed it to a local directory: C:\Inetpub\angryoctopus.net\ Added the appropriate headers: angryoctopus.net, www.angryoctopus.net, TCP port 80, all IPs Moved the website content into the local directory. Configured the default document in IIS: Default.aspx Enabled ASP.NET for this website, and set it to the correct version: 2.0.50727 Configured the zone angryoctopus.net in DNS. Tested DNS lookup here to ensure DNS was functional. Opened website in VS 2008 and re-built (and debugged) to ensure the content was functional. I can clearly see that IIS is responding normally, by browsing directly to my server's IP address. Since this does not use the angryoctopus HTTP header, the default website is displayed instead: the "Under Construction" page. And yet, after all of this, angryoctopus.net still returns 404. Does anybody know what could be wrong? What troubleshooting steps have I forgotten? Is there a command-line diagnostic that might provide more information?

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• install latest gcc as a non-privileged user

  - by voth

  I want to compile a program on a cluster (as a non-privileged user), which requires gcc-4.6, but the cluster has only gcc-4.1.2. I don't want to tell the administrator to update gcc, because 1) he is busy and would do it only after several days. 2) He probably wouldn't update it anyway, since other users may need the older gcc version (gcc is not backward compatible) I tried to compile gcc from source, which seems more difficult that it sounds, since it requires several other packages to be installed (GMP, MPFR, MPC, ...), and when I did it, after several hours I got a message like checking for __gmpz_init in -lgmp... no configure: error: libgmp not found or uses a different ABI (including static vs shared). at which point a got stuck. My question is: what is the easiest way to install the latest version of gcc as a non-privileged user? (something like apt-get install XXXXX, with an option to not install as root for example) The setup of the cluster is the following: CentOS release 5.4 (Final) Rocks release 5.3 (Rolled Tacos) If there are no other options than compiling from source, do you have any ideas how to handle the above error?

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• IIS 7.5 Warning : Cannot verify access to the path

  - by Mostafa

  I'm newbie in IIS 7.5 , Before this I used to run ASP.NET Website under IIS 5 , That was too easy . I'm trying to run a very simple asp.net website ( just created a new website from VS 2010 targeted in .net 3.5) in IIS 7.5.7600 on windows 7 Ultimate 64 bit . While adding application , during Test Setting i receive one warning that says : The server is configured to use pass-through authentication with a built-in account to access the specified physical path. However, IIS Manager cannot verify whether the built-in account has access. Make sure that the application pool identity has Read access to the physical path. If this server is joined to a domain, and the application pool identity is NetworkService or LocalSystem, verify that \$ has Read access to the physical path. Then test these settings again But I don't know how to make sure application pool identity has read access to the physical path ? I'm wondering if there is any step by step article or some thing that show me the walk-though for running a simple asp.net website on IIS 7.5? I appreciate any help .

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• Transparent proxying leaves sockets with SYN_RCVD in MacOS X 10.6 Snow Leopard (and maybe FreeBSD)

  - by apenwarr

  I'm trying to create a transparent proxy on my MacOS machine in order to port the sshuttle ssh-based transproxy VPN from Linux. I think I almost have it working, but sadly, almost is not 100%. Short version is this. In one window, start something that listens on port 12300: $ while :; do nc -l 12300; done Now enable proxying: # sysctl -w net.inet.ip.forwarding=1 # sysctl -w net.inet.ip.fw.enable=1 # ipfw add 1000 fwd 127.0.0.1,12300 log tcp from any to any And now test it out: $ telnet localhost 9999 # any port number will do # this works; type stuff and you'll see it in the nc window $ telnet google.com 80 # any host/port will do # this *doesn't* work! After the latter experiment, I see lines like this in netstat: $ netstat -tn | grep ^tcp4 tcp4 0 0 66.249.91.104.80 192.168.1.130.61072 SYN_RCVD tcp4 0 0 192.168.1.130.61072 66.249.91.104.80 SYN_SENT The second socket belongs to my telnet program; the first is more suspicious. SYN_RCVD implies that my SYN packet was correctly captured by the firewall and taken in by the kernel, but apparently the SYNACK was never sent back to telnet, because it's still in SYN_SENT. On the other hand, if I kill the nc server, I get this: $ telnet google.com 80 Trying 66.249.81.104... telnet: connect to address 66.249.81.104: Connection refused telnet: Unable to connect to remote host ...which is as expected: my proxy server isn't running, so ipfw redirects my connection to port 12300, which has nobody listening on it, ie. connection refused. My uname says this: $ uname -a Darwin mean.local 10.2.0 Darwin Kernel Version 10.2.0: Tue Nov 3 10:37:10 PST 2009; root:xnu-1486.2.11~1/RELEASE_I386 i386 Does anybody see any different results? (I'm especially interested in Snow Leopard vs Leopard results, as there seem to be some internet rumours that transproxy is broken in Snow Leopard version) Any advice for how to fix?

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• How does Linux determine the SCSI address of a disk?

  - by Chris Sears

  Greetings, I'm working with RHEL 5.5 guest VMs under VMware ESX 4. When I configure the virtual disks in the VM hardware settings, each disk has a SCSI address in the format "N:M". For example, "1:3" would mean SCSI host number 1 and SCSI target ID 3. When I look at the disk info from the VM's BIOS or a Windows OS, the detected SCSI address info matches up with the virtual hardware settings. But under Linux, the SCSI address components don't match up, at least not completely or consistently. I've tried the three supported virtual SCSI and SAS drivers and they all seem to be "broken", but in different ways. Here's a list of the virtual hardware addresses vs what was detected under Linux with each of the drivers: Driver vHW Addr Linux Addr -------- -------- ---------- LSI SAS 0:0 0:0 LSI SAS 0:3 0:1 LSI SAS 0:6 0:2 LSI SCSI 1:1 2:1 LSI SCSI 1:4 2:4 LSI SCSI 1:7 2:7 pvSCSI 2:2 1:2 pvSCSI 2:5 1:5 pvSCSI 2:8 1:8 My main question is why does this happen under Linux? The next question is: how do I get it fixed or fix it myself? If I was going to guess, I'd say it's an issue with how the kernel is handing out the SCSI host number and how the Linux SCSI driver (included with VMware tools) is detecting the SCSI target number. Perhaps the order the drivers are loaded also has something to do with the issue. I'm guessing this would not involve udev, but I could be wrong. Any thoughts would be appreciated. Thanks! PS. My environment is VMware, but I don't need an answer for these drivers specifically. I imagine this might be a problem with any SCSI driver under Linux.

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• What is it safe to let Revo Uninstaller cleanup leftovers?

  - by msorens

  I have been a user of Revo Uninstaller (free) for sometime and find it does a very good cleanup job with typical applications. Today I wanted to clean up my machine a bit more so I proceeded to remove Visual Studio 2005 with Revo Uninstaller. The VS installer removed the app with no issues, then Revo reported about 20,000 leftover registry keys. I am used to basically just see Arpcache and Muicache... since I am not a registry expert I had no clue about most of the 20,000 listed. So I backed up the registry then let Revo remove the 20,000. It next reported about 1500 leftover files which included my Microsoft Office applications(!) that I knew it should not be touching. So I did not delete any files with Revo. Suspecting that some of the removed keys were also Office-related, I tried to open Word and Excel, both of which knew something was up, as the installer kicked in (albeit just briefly) for each of them. At this point, since I knew there were issues, I just restored the registry and I am now (seemingly) running OK. My question, then: When is it safe to trust Revo Uninstaller? As a seasoned software professional, my own answer to this would be the obvious "When the keys it reports are something you understand and know are safe to delete" but then that makes Revo of little use except to registry experts, does it not...?

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• Install Apache + PHP on CentOS server

  - by Scott

  Hi everyone, I am trying to use YUM to install Apache and PHP on CentOS but keep getting these errors. Anyone know what's wrong? Thanks! Loading mirror speeds from cached hostfile * c5-testing: dev.centos.org Setting up Install Process Parsing package install arguments Resolving Dependencies --> Running transaction check ---> Package httpd.i386 0:2.2.8-1.el5s2.centos set to be updated --> Finished Dependency Resolution Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: httpd i386 2.2.8-1.el5s2.centos c5-testing 1.0 M Transaction Summary ============================================================================= Install 1 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 1.0 M Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug ERROR with rpm_check_debug vs depsolve: Package perl-libapreq needs perl(Apache::Table), this is not available. Package perl-libapreq needs perl(mod_perl) >= 1.17, this is not available. Package perl-libapreq needs perl(mod_perl) >= 1.17, this is not available. Package apache-devel needs apache = 1.3.41, this is not available. Complete! bash-3.2#

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• Win2008: Boot from mirrored dynamic disk fails!

  - by Daniel Marschall

  Hello. I am using Windows Server 2008 R2 Datacenter and I got two 1.5TB S-ATA2 hard disks installed and I want to make a soft raid. (I do know the disadvantages of softraid vs. hardraid) I have following partitions on Disk 0: (1) Microsoft Reserved 100 MB (dynamic), created during setup (2) System Partition 100 GB (dynamic) (3) Data partition, 1.2TB (dynamic) I already mirrored these contents to Disk 1. Its contents are: (1) System partition mirror, 100 GB (dynamic) (2) Data partition, 1.2 TB mirror (dynamic) (3) Unusued 100 MB (dynamic) -- is from "MSR" of Disk 0, created during setup. Since data and system partition are mirrored, I expect that my system works if disk 0 would fail. But it doesn't. If I force booting on disk 0: Works (I get the 2 bootloader screen) If I force booting on disk 1 (F8 for BBS), nothing happens. I got a blank black screen with the blinking caret. I already made disk1/partition1 active with diskpart, but it still does not boot from this drive. Please help. Both partitions are in "MBR" partition style. They look equal, except the missing "MSR" partition at the partition beginning (which seems to be not relevant to booting). Regards Daniel Marschall

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• What is causing sudden freezing during running real-time program?

  - by Trevor Boyd Smith

  So I run a high intensive (CPU/GPU) real-time program. During normal execution suddenly everything freezes for 1-4 seconds. I opened "Process Explorer" in the background to help gain insight and maybe identify something. Here is what the CPU/GPU graphs looks like when I align them in time: Notice the 4 distinct drops in both the CPU/GPU. You can see that it goes from some sort of positive CPU/GPU usage to almost zero. These drops in the graph align with when the real-time program suddenly freezes. How do I find what is causing these sudden drops? NOTE: When you put your mouse over the graph it tells you the time, accurate to the second, for where your cursor is. Maybe this mouse over feature could be helpful in some way (e.g. what if you had a log of all processes every 100ms). EDIT: The real-time program is a video game and so I can't watch some sort of instrumentation while the video game is running. I need a solution that let's you look back in time somehow to see what was happening when the slow down occurred. EDIT: RE - Recording Data vs using real-time monitor: So the windows performance recorder is for some reason not recording what I expect it to record. So I switched to using "perfmon" and then opening it's "resource monitor". RE - Setting it up so I can view real-time monitor: In the video game I set it to spectate and then put the video game in "windowed" mode so that I can view the real time display that Resource Monitor has. Now that I can get semi-real time (only once per second... how do you get more than once per second?) I started looking at the various real time data readouts. Getting to the cause: I noticed a strong correlation in high disk IO and low CPU usage (which is also seen by having in-game freezing). How do you use resource monitor to find out who is doing all this offending disk IO?

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