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• RRAS Public Address Pool on Windows Server 2008

  - by Art

  I have a Windows 2008 server with two NICs running RRAS and a small public website. It also does NAT for several other PCs on my network and everything works great. I have a block of 5 public static IPs from my ISP, one of which is bound to the public NIC in the Windows 2008 server. I would like to assign one of the remainging 4 public IPs to a machine on my private network. I thought I could do this by going into RRAS, selecting NAT under IPv4 and then adding the public IP address to the address pool and specifying a reservation for the machine I would like to use that address by adding its private ip address. When I do this, the machine I reserved the public IP address for seems to loose all outside network connectivity. I can still ping other PCs on my 192.168.0.* net, but anything outside is no longer reachable. When I remove the reservation, everything seems to work. After setting the reservation and right clicking on the external public interface and selecting 'Show Mappings' I can see outbound requests from my private address with the desired associated private address, however I do not see any inbound requests. What am I doing wrong/missing?

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• Are there any statistics on the number of networks using Ethernet Jumbo frames?

  - by Russell Heilling

  I am often told by Sales Engineers and Product managers that a Layer 2 Ethernet service is not fit for purpose if the maximum supported frame size is in the 1518-1522 range (enough to support standard Ethernet frames or VLAN tagged frames). Or in other words: an MTU of 1500 is not enough (see this blog post for my definition of MTU and a short rant on how the term is often misused) I am never able to get any details from them on: a) What proportion of customers (Enterprise / SMB) require Jumbo frames b) What are typical expectations on frame size for Jumbos on WAN links? 1600, 2000, 9k, etc... I know that in Telco and Data Centre environments Jumbos are pretty common, but I am after some insight as to how common this is within Enterprise and SMB networks.

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• What is the best free software to learn touch-typing?

  - by gojira

  What is the best free software to learn touch-typing? Features it needs to have: should NOT display the keyboard layout on the screen! should give detailed statistics which actually measure progress (for which key do I have the highest error rate, graphs showing how typing speed improved over time, etc) should enable me to actually learn touch-typing in about one long weekend were I don't do much else than learning to touch-type. it would be very good if it were possible to load a text-file and the program will use words from the text-file for the exercises as well My goals are: at least same typing speed as I have now but which touch-typing, want to be able to look at the screen only when typing P.S.: EDIT: I forgot to mention, I'm using Win 7. And I know what the Dvorak and Colemak keyboard layouts are, but I'm not interested in them. My question was with respect to standard US keyboard layout.

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• Passive FTP Server Port Configuration Troubles Win2003

  - by Chris

  Win2003 Ports 20 & 21 are open IIS6 - Direct Metabase Edit enabled Configured FTP service passive range to 5500-5550 5500-5550 added to windows firewall iisreset and double checked by restarting ftp service nothing has changed, when I connect and enter passive, it still hangs when ever I try to LIST or transfer files. Active is just as useless. Microsoft Windows [Version 6.1.7600] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:\Users\user>ftp ftp> open x.x.x.x Connected to x.x.x.x. 220-Microsoft FTP Service xxxxxxxxxxxxxxxxxx 220 xxxxxxxxxxxxxxxxxx User (x.x.x.x:(none)): user 331 Password required for user. Password: 230-YOUR ACTIVITY IS BEING RECORDED TO THE FULLEST EXTENT 230 User user logged in. ftp> QUOTE PASV 227 Entering Passive Mode (82,19,25,134,21,124) ftp> ls 200 PORT command successful. 150 Opening ASCII mode data connection for file list. and it hangs.. Now I can see from microsooft documentation that on newer windows releases, additional steps such as these are suggested, but they dont work on 2003... netsh advfirewall firewall add rule name=”FTP Service” action=allow service=ftpsvc protocol=TCP dir=in netsh advfirewall set global StatefulFTP disable is there anything I am missing, what is this StatefulFTP malarkey at the end EDIT I can connect and transfer binary files using WinSCP client - Therefore the problem must be with my ftp commands no? Can anyone see anything wrong with my windows ftp client example? why would it hang on ls, i tried QUOTE LIST as well, and that just hangs, and the windows ftp client doesnt work in active, it hangs if I try to go "binary" then put - This worked before I added 5500-5550 on the router. I have since added this range to the router but no difference to the windows ftp client.

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• Mouse cursor in Terminal?

  - by marienbad

  I use Mac OS X Terminal.app. But the answer to this would probably apply to any typical UNIX-ish terminal emulator in a graphical environment. Question -- what do I do to: Use my mouse cursor to click on a character-position in the current line of the terminal, and have the terminal's cursor jump to that spot? Typically, you have to hold down an arrow key to move to the correct cursor position. If you're pasting in a long string of text at the shell prompt, or working in an editor like VI, this can take a long time. I know editors have other navigation keys like jump-words, but I like my mouse cursor.

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• Recovering a damaged microSDHC

  - by djechelon

  I just bought from eBay a Kingston 32GB microSDHC that was advertised as defective. The seller said that there could be formatting problems or with transfer of large files. Unfortunately, when I got it, it was a total mess. My Nikon camera doesn't read it at all (OK, maybe it doesn't support 32GB) My Linux laptop doesn't mount it: can't read superblock The same laptop refuses to mkfs.msdos because it failed whilst writing reserved sector The same laptop, under Windows, doesn't read nor format the card HTC HD2 mounts the MMC, allows me to write via USB, but is unable to open the just written files OK, folks, now you would say I would have to go through Paypal complaint... that's not that easy. I consciously bought a half-price card that was known to show some defects, and Paypal complaints take time. Obviously, I can't accept somebody sold me a completely use-less computer decoration. So I'll keep it as last option. My question is Do you know a way, under either Linux or Windows, to thoroughly scan, test and possibly repair memory cards, even if I have to lose some percentage of space because of bad sectors? If I can keep at least half of the card intact it would certainly be fine. I used to do broken sector marking with hard disks in the past. I almost forgot: MONSTR:/home/djechelon # fsck /dev/mmcblk0p1 fsck from util-linux-ng 2.17.2 dosfsck 3.0.9, 31 Jan 2010, FAT32, LFN Read 512 bytes at 0:Input/output error

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• MASM Syntax Highlighting in C++ for Visual Studio 2010

  - by Ian Mallett

  So, I had Visual Studio 2010 Ultimate, and everything was great. However, I was confused, thought I wanted MASM, and installed the SDK. This causes strange problems for syntax highlighting. When I'm editing a C/C++ file, for instance, a lot of words (e.g., "data", "add", "sub", "mul", "div", "eax", etc.) are highlighted. At first, I thought I'd just learn to live with it, but it has gotten annoying. I could find nothing online, so, I deleted the MASM folder completely (method of uninstallation), uninstalled Visual Studio, and then installed it again. I firedit up, and the problem persists. Any clues? Thanks, Ian

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• install Win7 SP1 with bcdedit failing

  - by Albert

  I'm getting the error 0x800F0A12 which is described here. bcdedit says: C:\>bcdedit.exe Der Speicher für die Startkonfigurationsdaten konnte nicht geöffnet werden. Das System kann die angegebene Datei nicht finden. (English: Couldn't open the start configuration. Couldn't find the file.) (off topic: how can I get those messages in English?) I played around and I assume that is because the system partition C:\ is not on the first BIOS disk. There are 4 disks in my PC. On one of them (shown as the 4th in Windows drive manager) contains Windows, whereby the system-reserved NTFS partition is the first primary and the second primary is my main Windows system partition. A few more partitions follow with other (non-NTFS) stuff. I was able to set the first two disks offline (via the Windows drive manager). For the 3rd disk, it says that it cannot set the BIOS 0 disk offline. How can I ignore that and still install SP1? I don't want to rewire/resetup my disks.

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• Why won't dhclient use the static IP I'm telling it to request?

  - by mike

  Here's my /etc/dhcp3/dhclient.conf: request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, domain-search, host-name, netbios-name-servers, netbios-scope, interface-mtu; timeout 60; reject 192.168.1.27; alias { interface "eth0"; fixed-address 192.168.1.222; } lease { interface "eth0"; fixed-address 192.168.1.222; option subnet-mask 255.255.255.0; option broadcast-address 255.255.255.255; option routers 192.168.1.254; option domain-name-servers 192.168.1.254; } When I run "dhclient eth0", I get this: There is already a pid file /var/run/dhclient.pid with pid 6511 killed old client process, removed PID file Internet Systems Consortium DHCP Client V3.1.1 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ wmaster0: unknown hardware address type 801 wmaster0: unknown hardware address type 801 Listening on LPF/eth0/00:1c:25:97:82:20 Sending on LPF/eth0/00:1c:25:97:82:20 Sending on Socket/fallback DHCPREQUEST of 192.168.1.27 on eth0 to 255.255.255.255 port 67 DHCPACK of 192.168.1.27 from 192.168.1.254 bound to 192.168.1.27 -- renewal in 1468 seconds. I used strace to make sure that dhclient really is reading that conf file. Why isn't it paying attention to my "reject 192.168.1.27" and "fixed-address 192.168.1.222" lines?

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• good free OCR with GUI for correcting errors (for Windows)

  - by Hugh Allen

  I've used SimpleOCR, which has a nice GUI for correcting errors. Unfortunately it makes a lot of errors! (and suffers other bugs and limitations) On the other hand Tesseract is more accurate but has no GUI at all. Is there a free OCR program for Windows which has a nice GUI and a low error rate? I want it to highlight suspect words (by OCR uncertainty, not just spell checking) and show the original (bitmap) word while I'm editing the OCRed word similar to what SimpleOCR does: Open-source would be best, followed by freeware, then trial / crippleware a long way behind.

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• Sonicwall - dual WAN ports - switch from one to another

  - by Charles

  Hi, Folks! I'm using a SonicWall NSA 240 which has two WAN ports (T1 and Comcast) and the LAN port has a cable which connects to a switch. From the switch, several cables connect to other switches. The SonicWall doesn't have DHCP enabled; one of our domain controllers running Windows Server 2003 also functions as a DHCP server. Is there a way for a user in our network to change connection from T1 to Comcast as their ISP or vice versa? In other words, if a user is connected via the T1, can he/she somehow connect via Comcast instead? Thanks, in advance, for your help! Sincerely, Charles

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• Regular Windows 7 BSOD with Shrew VPN client

  - by Junto

  The Shrew VPN client appears to be a good alternative to the Cisco VPN Client on x64 Windows 7. However, since installing it I've seen fairly regular BSODs. Minidump attached: Microsoft (R) Windows Debugger Version 6.11.0001.404 AMD64 Copyright (c) Microsoft Corporation. All rights reserved. Loading Dump File [D:\Temp\020810-23431-01.dmp] Mini Kernel Dump File: Only registers and stack trace are available Symbol search path is: SRV*d:\symbols*http://msdl.microsoft.com/download/symbols Executable search path is: Windows 7 Kernel Version 7600 MP (8 procs) Free x64 Product: WinNt, suite: TerminalServer SingleUserTS Built by: 7600.16385.amd64fre.win7_rtm.090713-1255 Machine Name: Kernel base = 0xfffff800`0285f000 PsLoadedModuleList = 0xfffff800`02a9ce50 Debug session time: Mon Feb 8 18:08:12.887 2010 (GMT+1) System Uptime: 0 days 7:52:06.120 Loading Kernel Symbols ............................................................... ................................................................ .............. Loading User Symbols Loading unloaded module list .... ******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* Use !analyze -v to get detailed debugging information. BugCheck A, {0, 2, 0, fffff800028d50b6} Unable to load image \SystemRoot\system32\DRIVERS\vfilter.sys, Win32 error 0n2 *** WARNING: Unable to verify timestamp for vfilter.sys *** ERROR: Module load completed but symbols could not be loaded for vfilter.sys Probably caused by : vfilter.sys ( vfilter+29a6 ) Followup: MachineOwner Machine is a brand spanking new Dell Precision T5500. Superuser appears to have several recommendations for the Shrew VPN Client as an alternative to the Cisco VPN client on 64 bit machines, so I wondered if anyone here has seen this problem and possibly found a solution to the problem? I've decided to run the VPN client under Windows 7 compatibility mode for the moment (Vista SP2) with administrator privileges to see if it makes a difference. Oddly, the VPN doesn't necessarily need to be connected. I've noticed it when browsing using Google Chrome and Internet Explorer, usually when I open up a new tab. If it carries on I think I'll be forced to shell out the 120 EUR for the NCP Client instead.

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• Chatbot client and class modification

  - by blake

  ChatBot Class Modification: Modify the reply() method of the ChatBot class to recognize additional words and phrases. Part 1: Everyone must complete this section. When the userInput parameter value is: The reply method should return: how do I quit enter quit how do I exit enter quit how do I stop enter quit how do I ____ do you really want to do that how are you I'm fine how ______ I don't know Add two additional words or phrases to recognize and respond to. ChatBot Client Modification: Modify the ChatBot client application to loop until the end-user enters "quit". Here is my service class / ** * Java Chatbot Service class * @author Blake * 3/5/2012 */ /** * Default constructor. */ public class Chatbot { private String name; /** Users name */ private String introbot; /** Name of the Chatbot */ private String reply; /** Replies to the input of the string name and string introbot */ /** * Constructs mutebot object * @param mutebow - returns name of mutebot */ public Chatbot() { name = "MuteBot"; } /** * Changes Name * @param name - new name */ public void setName (String n) { name = n; } /** * Accesses name * @return a brand new name */ public String getName() { return name; } /** * Accesses introbot * @return name of mutebot */ public String introbot() { String intro = "Hello! My name is " + name; return intro; } /** * Accesses replay(String newuserinput) * @return introbot reply to user input */ public String getreply(String newuserinput) { String reply = "I'm just learning to talk"; if (newuserinput.equalsIgnoreCase("What")) reply = "Why do you ask?"; else if (newuserinput.equalsIgnoreCase("Why") ) reply = "Why Not"; else if (newuserinput.equalsIgnoreCase("How")) reply = "I don't know!"; else if (newuserinput.equalsIgnoreCase("Where") ) reply = "Anne Arundel Community College"; else if (newuserinput.equalsIgnoreCase("When")) reply = "Tomorrow"; else if (newuserinput.equalsIgnoreCase("how do I quit")) reply = "enter quit"; else if (newuserinput.equalsIgnoreCase("how do I exit")) reply = "enter quit"; else if (newuserinput.equalsIgnoreCase("how do I stop")) reply = "enter quit"; else if (newuserinput.equalsIgnoreCase("how are you")) reply = "I'm fine"; else if (newuserinput.equalsIgnoreCase("how do you do")) reply = "I am doing well"; else if (newuserinput.equalsIgnoreCase("how do I get out")) reply = "By going through the door"; else if (newuserinput.indexOf("how do I" ) ==0) { String substring = newuserinput.substring(8); reply = "do you really want to do that" + substring; } else if (newuserinput.indexOf("how" ) ==0) { String substring = newuserinput.substring(10); reply = "I don't know" + substring ; } return reply; } } Here is my client/application class /** * Java Chatbot Client class * @author Blake * 3/5/2012 */ import java.util.Scanner; public class ChatbotClient { public static void main(String[] args) { Scanner input = new Scanner(System.in); Chatbot t = new Chatbot(); System.out.print("What is your name? "); String name = input.nextLine(); System.out.println(t.introbot()); System.out.print(name + "> "); String reply = input.nextLine(); System.out.println(t.getName() + "> " + t.getreply(reply)); //while (reply < quit) /*{ quit++ i = i + 1 }*/ } } I don't know what I am doing wrong with this part right here Modify the ChatBot client application to loop until the end-user enters "quit". I am trying to create a while loop which will continue until user says quit.

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• Xen domU passwd file overwritten with console log output

  - by malfy

  I was setting up a Debian Xen domU and after booting it fine, I added basic configuration to /etc/network/interfaces and ran /etc/init.d/networking restart. This failed so I decided to reboot. After the reboot I also ran xm shutdown box. When dropped to a shell prompt it wouldn't let me login. Upon further inspection, I now have garbage in some critical files in /etc: root@box:/# tail +1 mnt/etc/{passwd-,shadow} tail: cannot open `+1' for reading: No such file or directory ==> mnt/etc/passwd- <== 0000000000100000 (reserved) Nov 23 02:02:39 box kernel: [ 0.000000] Xen: 0000000000100000 - 0000000004000000 (usable) Nov 23 02:02:39 box kernel: [ 0.000000] DMI not present or invalid. Nov 23 02:02:39 box kernel: [ 0.000000] last_pfn = 0x4000 max_arch_pfn = 0x1000000 Nov 23 02:02:39 box kernel: [ 0.000000] initial memory mapped : 0 - 033ff000 Nov 23 02:02:39 box kernel: [ 0.000000] init_memory_mapping: 0000000000000000-0000000004000000 Nov 23 02:02:39 box kernel: [ 0.000000] NX (Execute Disable) protection: active Nov 23 02:02:39 box kernel: [ 0.000000] 0000000000 - 0004000000 page 4k Nov 23 02:02:39 box kernel: [ 0.000000] kernel direct mapping tables up to 4000000 @ 7000-2c000 Nov 23 02:02:3 ==> mnt/etc/shadow <== 32 nr_cpumask_bits:32 nr_cpu_ids:1 nr_node_ids:1 Nov 23 02:02:39 box kernel: [ 0.000000] PERCPU: Embedded 15 pages/cpu @c15b0000 s37688 r0 d23752 u65536 Nov 23 02:02:39 box kernel: [ 0.000000] pcpu-alloc: s37688 r0 d23752 u65536 alloc=16*4096 Nov 23 02:02:39 box kernel: [ 0.000000] pcpu-alloc: [0] 0 Nov 23 02:02:39 box kernel: [ 0.000000] Xen: using vcpu_info placement Nov 23 02:02:39 box kernel: [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16160 Nov 23 02:02:39 box kernel: [ 0.000000] Kernel command line: root=/dev/mapper/xen-guest_root ro quiet root=/dev/xvda1 ro Nov 23 02:02:39 box kernel: [ 0.000000] PID hash table entries: The garbage is also present in the passwd file and the group file (although I didn't paste that above since I have since ran debootstrap on the filesystem again). Does anyone have any insight into what happened and why?

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• Author Tools for Classroom Material?

  - by user1413

  I'm interested in putting a whole bunch of classroom material online. This material ranges from accounting classes to yoga. I would like to find a simple to use authoring tool that the people who teach the classes can use to put the material online. In other words, I do not want a tool that requires a developer. A person who knows the subject matter and is willing to read the manual should be able to put their material online. At minimum, this tool should allow for text and multi-media to be chained together in a logical form and it should allow quizzes to be created and graded. Even better would be for the tool to have some "smarts" so that subject areas which the student does not understand can be drilled. Even better would be for the tool to have ecommerce built in so that the instructors can charge for the classes. Are there any such tools?

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• Mirror/Backup from SSH/SFTP to Windows

  - by Andrew Russell

  What I am trying to do is mirror a directory (recursively) from a server I can SSH/SFTP to, to a Windows machine. I want to do this as part of a script, so it can be automated. I only want to copy new or modified files. I don't want to have to download all the files every time the script runs. In other words, I'm trying to get the equivalent of RoboCopy /MIR that will work using SFTP as a source. What would you recommend?

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• Restricting memory area for linux kernel

  - by user1066789

  I am running ltib linux on P1022RDK (P1022 Core) platform. I have 512 MB = 0x20000000 memory. I want my linux kernel to use second half of the board memory (i.e from 256 MB to 512 MB) and want first half of memory to be reserved for some other purpose. For this I am building linux kernel using ltib. For that purpose I am setting following kernel configuration. Please suggest if I am doing it the right way. CONFIG_LOWMEM_SIZE = 0x10000000 # 256 MB CONFIG_PHYSICAL_START = 0x10000000 # Starting from 256MB (second half of memory) On the Uboot I am loading the kernel as following way setenv loadaddr 0x11000000 # Kernel base = 0x10000000 + 0x01000000 (offset) setenv fdtaddr 0x10c00000 # Kernel base = 0x10000000 + 0x00c00000 (offset) bootm $loadaddr - $fdtaddr My kernel Load address is 0x10000000 & kernel entry point is 0x10000000 Doing above configuration / steps my kernel stuck at following on Uboot ## Booting kernel from Legacy Image at 11000000 ... Image Name: Linux-2.6.32.13 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3352851 Bytes = 3.2 MB Load Address: 10000000 Entry Point: 10000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 10c00000 Booting using the fdt blob at 0x10c00000 Uncompressing Kernel Image ... OK ================ >> It should uncompress FDT here & continue ============== Any thoughts ?

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• Restricting memory area for linux kernel

  - by user1066789

  I am running ltib linux on P1022RDK (P1022 Core) platform. I have 512 MB = 0x20000000 memory. I want my linux kernel to use second half of the board memory (i.e from 256 MB to 512 MB) and want first half of memory to be reserved for some other purpose. For this I am building linux kernel using ltib. For that purpose I am setting following kernel configuration. Please suggest if I am doing it the right way. CONFIG_LOWMEM_SIZE = 0x10000000 # 256 MB CONFIG_PHYSICAL_START = 0x10000000 # Starting from 256MB (second half of memory) On the Uboot I am loading the kernel as following way setenv loadaddr 0x11000000 # Kernel base = 0x10000000 + 0x01000000 (offset) setenv fdtaddr 0x10c00000 # Kernel base = 0x10000000 + 0x00c00000 (offset) bootm $loadaddr - $fdtaddr My kernel Load address is 0x10000000 & kernel entry point is 0x10000000 Doing above configuration / steps my kernel stuck at following on Uboot ## Booting kernel from Legacy Image at 11000000 ... Image Name: Linux-2.6.32.13 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3352851 Bytes = 3.2 MB Load Address: 10000000 Entry Point: 10000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 10c00000 Booting using the fdt blob at 0x10c00000 Uncompressing Kernel Image ... OK ================ It should uncompress FDT here & continue ============== Any thoughts ?

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• What does this mean: "SATP VMW_SATP_LOCAL does not support device configuration"?

  - by Jason Tan

  Can anyone tell me what this means in ESXi 5.1?: SATP VMW_SATP_LOCAL does not support device configuration I've googled it and I get a lot of results, but as yet all the pages that contain the string are discussing other matters. The storage array is a HDS HUS-VM and the hosts are HP b460c G8 blades with flex fabric and flex fabric VCs which I am in the process of commissioning and would like to get it started on the right foot - i.e. error and warning free! naa.600508b1001c56ee3d70da65f071da23 Device Display Name: HP Serial Attached SCSI Disk (naa.600508b1001c56ee3d70da65f071da23) Storage Array Type: VMW_SATP_LOCAL Storage Array Type Device Config: SATP VMW_SATP_LOCAL does not support device configuration. Path Selection Policy: VMW_PSP_FIXED Path Selection Policy Device Config: {preferred=vmhba0:C0:T0:L1;current=vmhba0:C0:T0:L1} Path Selection Policy Device Custom Config: Working Paths: vmhba0:C0:T0:L1 Is Local SAS Device: true Is Boot USB Device: false This is the same LUN: ~ # esxcli storage core device list -d naa.60060e80132757005020275700000016 naa.60060e80132757005020275700000016 Display Name: HITACHI Fibre Channel Disk (naa.60060e80132757005020275700000016) Has Settable Display Name: true Size: 204800 Device Type: Direct-Access Multipath Plugin: NMP Devfs Path: /vmfs/devices/disks/naa.60060e80132757005020275700000016 Vendor: HITACHI Model: OPEN-V Revision: 5001 SCSI Level: 2 Is Pseudo: false Status: degraded Is RDM Capable: true Is Local: false Is Removable: false Is SSD: false Is Offline: false Is Perennially Reserved: false Queue Full Sample Size: 0 Queue Full Threshold: 0 Thin Provisioning Status: unknown Attached Filters: VAAI_FILTER VAAI Status: supported Other UIDs: vml.020001000060060e801327570050202757000000164f50454e2d56 Is Local SAS Device: false Is Boot USB Device: false ~ #

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• How do hdparm's -S and -B options interact?

  - by user697683

  These two options seem confusing. For example: according to the man page -B 254 "does not permit spin-down". However, testing with -B 254 -S 1 the drive does spin down after 5 seconds. -B Query/set Advanced Power Management feature, if the drive supports it. A low value means aggressive power management and a high value means better performance. Possible settings range from values 1 through 127 (which permit spin-down), and values 128 through 254 (which do not permit spin-down). The highest degree of power management is attained with a setting of 1, and the highest I/O performance with a setting of 254. A value of 255 tells hdparm to disable Advanced Power Management altogether on the drive (not all drives support disabling it, but most do). -S Put the drive into idle (low-power) mode, and also set the standby (spindown) timeout for the drive. This timeout value is used by the drive to determine how long to wait (with no disk activity) before turning off the spindle motor to save power. Under such circumstances, the drive may take as long as 30 seconds to respond to a subsequent disk access, though most drives are much quicker. The encoding of the timeout value is somewhat peculiar. A value of zero means "timeouts are disabled": the device will not automatically enter standby mode. Values from 1 to 240 specify multiples of 5 seconds, yielding timeouts from 5 seconds to 20 minutes. Values from 241 to 251 specify from 1 to 11 units of 30 minutes, yielding timeouts from 30 minutes to 5.5 hours. A value of 252 signifies a timeout of 21 minutes. A value of 253 sets a vendor-defined timeout period between 8 and 12 hours, and the value 254 is reserved. 255 is interpreted as 21 minutes plus 15 seconds. Note that some older drives may have very different interpretations of these values.

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• How to block a program from using IPv4?

  - by Ian Boyd

  I have a program that can communicate over IPv4 (TCP and UDP) and over IPv6 (TCP and UDP). I want to block the program from being able to use IPv4. I tried the Windows Firewall: Except it blocks IP sub-protocols (e.g. TCP, UDP, encapsulated IPv6, GRE), rather than blocking IPv4 itself. In other words, I need to block IPv4: IPv4/TCP IPv4/UDP IPv4/ICMPv4 IPv4/GRE IPv4/L2TP while allowing IPv6: IPv6/TCP IPv6/UDP IPv6/ICMPv6 IPv6/GRE IPv6/L2TP Can I block a program from using IPv4? Note: If it cannot be done, then don't be afraid to add that as an answer. There's no shame in giving the correct answer to a question.

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• Monitoring multiple sites on a single server using OpsView

  - by Kev

  We have several web servers. On each of these servers there can be ~250 web sites. I need to add a HTTP check for each site on each server. Each site has a reserved host header that we know can always be resolved in the format of: w10000.hostchecks.mycompany.com w10020.hostchecks.mycompany.com w11992.hostchecks.mycompany.com ..and so on.. What I want is for there to be a master ping check on the web server's main IP address and then separate HTTP checks for each of the sites on the server. If the master ping test fails then I want the HTTP tests to cease until the master ping check goes OK. I had a stab at this and tried do the following: Create a parent host that does a ping check on the server's main ip address (e.g. server is named WEB0001). For each of the sites that reside on WEB0001: Create a separate Host with a Primary Hostname of wXXXXX.hostchecks.mycompany.com Make WEB0001 the parent host Add a monitor (HTTP check to a special url that is mapped into each site using a virtual directory: H- $HOSTADDRESS$ -u /__hostcheck/IsAlive.aspx -w 5 -c 10 -p 80 However I find that if I down the parent server (WEB0001) the http checks seem to continue. Am I going about this completely the wrong way?

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• How to Uninstall License key

  - by balexandre

  I have bought and updated my Win 7 Pro to Windows 8 Professional and it's great ... all in all, I wanna keep using Windows 8, but something went wrong with Visual Studio 2012 Professional installation and there is no way I can install the target version for .NET 4.0 and I really need this to comply with old projects without affecting all the other developers. I do have an official license key bought when installing Windows 8, my question is, now that I need to format Install Win 7 Pro Upgrade to Win 8 Pro how do I make sure my next activation is successfully? In other words, how can I, not change, but remove my license so I can re-use it again when everything is fresh and updated

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• Is wiper.sh working?

  - by Aleksander Blomskøld

  I'm setting up a server running Ubuntu Precise, and I'm trying to verify if SSD TRIM is working. fstrim is failing: ~ sudo fstrim -v / fstrim: /: FITRIM ioctl failed: Operation not supported So I tried wiper.sh in hdparm: wiper-3.5 sudo ./wiper.sh --verbose --commit /dev/sda1 wiper.sh: Linux SATA SSD TRIM utility, version 3.5, by Mark Lord. rootdev=/dev/sda1 fsmode2: fsmode=read-write /: fstype=ext4 freesize = 169502088 KB, reserved = 1695020 KB Preparing for online TRIM of free space on /dev/sda1 (ext4 mounted read-write at /). This operation could silently destroy your data. Are you sure (y/N)? y Creating temporary file (167807068 KB).. Syncing disks.. Beginning TRIM operations.. get_trimlist=/sbin/hdparm --fibmap WIPER_TMPFILE.11503 /dev/sda: trimming 3211263 sectors from 64 ranges succeeded trimming 3571713 sectors from 64 ranges succeeded trimming 3915776 sectors from 64 ranges succeeded (...) trimming 3657913 sectors from 60 ranges succeeded Removing temporary file.. Syncing disks.. Done. It seems to be working, but I'm wondering if it really is. Are there any cases where wiper.sh should work when fstrim isn't? Is there any way I can check if the TRIMing actually has succeeded (other than trusting the wiper.sh-log)?

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• Syslog permissions

  - by Niels Kristian

  I'm using the $InputFile facility in rsyslog to monitor various log files scattered around my ubuntu 12.04 server. E.g. nginx, unicorn, rails, postgres, cron etc. Now my problem is, that some of these log files are created with -rw-r----- right, so rsyslog doesn't have read rights. Since I install most of the programs using apt-get, and therefore didn't change anything from default. So, in other words, I would like not to modify every singe log file / daemon to have the right permissions, if I instead could give syslog read access to all of them at once. But the question is - can I do that, and is it the "right thing to do"?

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