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• Offline installer for .net 3.5 sp1 not working

  - by Tim Tom

  I download a big file of .Net 3.5 SP1 from http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e-fdaa79a8ac3d/dotnetfx35.exe Now when I try to install it on Windows Server 2012, I get the following screenshot: What the?? When will the microsoft learn? Now this is a loop. When I try to install from Server Manager, I get installation cannot be done. It needs installation disk. Does that mean I can't install at all without the installation disk in presence?

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• Portable and Secure Document Repository

  - by Sivakanesh

  I'm trying to find a document manager/repository (WinXP) that can be used from a USB disk. I would like a tool that will allow you to add all documents into a single repository (or a secure file system). Ideally you would login to this portable application to add or retrieve a document and document shouldn't be accessible outside of the application. I have found an application called Benubird Pro (app is portable) that allows you to add files to a single repository, but downsides are that it is not secure and the repository is always stored on the PC and not on the USB disk. Are you able to recommend any other applications? Thanks

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• How to troubleshoot if a zip file is valid or if it is big file size to be unzipped ?

  - by mireille raad

  Hello , I am trying to unzip a file with the size of 2GB I am getting the following error : unzip CLTE_C_08.zip Archive: CLTE_C_08.zip End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this archive. unzip: cannot find zipfile directory in one of CLTE_C_08.zip or CLTE_C_08.zip.zip, and cannot find CLTE_C_08.zip.ZIP, period. After some googling, some people say that this error is because the file is too big, others say because file is corrupt, others say that it could be a not unix archive. So my question , how to find out if file is valid archive file on my Centos and what is the command/trick to uncompress big files ( if any ) Thanks in advance :)

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• ESXi5 - management services crashes - vms running

  - by Frederik Nielsen

  I have a setup with two ESXi5 servers. We are(were) running with a ISCSi box to server disk for the VM's - however we are in the progress of migrating away from it, because the storage os disk is bad. Now, one of the ESXi hosts has been running for ~20hrs, and it seems like the management services just crashed on that host.. The vms are still running - so it's not really serious. However, I want to fix it. Should I be worried? Will the VM's keep running? The hosts does respond on pings. I am running a vcenter to administrate the hosts. Thanks in advance.

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• What are typical drive lifetimes?

  - by Remus Rigo

  Can anyone tell me about the lifetime of drives (floppy, hard disk, CD, DVD, flash...)?

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• I found a some bad sectors with chkdsk. Should I be worried?

  - by mottalrd

  Yesterday I found a corrupted file in my external usb drive. Since I am using the drive quite often (I am running my vms over there) I decided to run the chkdsk on it This is the result 488384000 KB of total space on disk. 351202364 KB in 1042390 file. 489920 KB in 81101 indexes. 16 KB in damaged sectors. 1204584 KB in use. 65536 KB used from the registry. 135487116 KB available on disk. therefore it has found 16KB of damaged sectors. Now the file is recovered Should I be worried about the HD and run chkdsk periodically from now on?

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• Any experience with SATA SAS Interposer Cards?

  - by korkman

  Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called SATA-to-SAS interposer cards. Advertised as "seamlessly adding SAS capabilities to existing SATA disk drives", I wonder if anyone here has had some experience with these or similar products. The major benefits I can identify are the increased cable voltage (if all drives are SAS connected), the ability to power-cycle the drive and multipath (if desired). Obviously the SATA drive will still have to be RAID edition. The question is: Do these cards indeed increase the overall reliability of a storage system, or will failing SATA disks cause trouble nevertheless? Edit: I'm not asking for hypothetical answers, only actual experience please. I'm well aware that the typical 10k SAS drive is more reliable (and better performing) than 7200 SATA drives. But how does a nearline SAS, which is phyiscally the same disk as its SATA counterpart, compare to the SATA version with interposer?

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• How much space do NTFS hardlinks/symlinks occupy?

  - by Felix Dombek

  Well, I guess it must be something proportional to the original filename plus the new filename for symlinks, and only the new filename for hardlinks, but how does this affect the disk space exactly? I just made a folder with about a hundred thousand symbolic links in it, and the folder still reported 0 bytes usage. I may be mistaken, but I even think the free capacity of the drive remained the same. Then I permanently deleted the folder and the sizes still stayed the same. Could I fill up a hard disk just with symlinks? Or does NTFS have limitations in that no more than x symlinks are allowed on one drive/in one folder, so the capacity of the drive cannot be reached?

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• Determine Location of Inode Usage

  - by Dave Forgac

  I recently installed Munin on a development web server to keep track of system usage. I've noticted that the system's inode usage is climbing by about 7-8% per day even though the disk usage has barely increased at all. I'm guessing something is writing a ton of tiny files but I can't find what / where. I know how to find disk space usage but I can't seem to find a way to summarize inode usage. Is there a good way to determine inode usage by directory so I can locate the source of the usage?

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• Time machine link error

  - by robinjam

  When attempting to perform a Time Machine backup, the backup appears to proceed as normal, until it finishes copying files at which point it complains that an "error occurred while linking files for" one of my external hard disks. During the previous backup that particular disk was in fact empty, and therefore I can't understand why Time Machine is attempting to link back to it. But alas. I've verified all my disks using Disk Utility and they all appear to be fine. Does anybody know what causes this error, and how I might go about fixing it? Failing that is there a way to force Time Machine to create a brand new backup rather than an incremental one? Thanks in advance!

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• Converting an ancient RH8 system to VMware ESXi

  - by donatello

  I am curious to know what options I have to convert a very old RedHat8 machine to a virtual one on ESXi. Looking at VMware Converter it seems there's an option to login to the RH8 using SSH, and from there it will convert to the ESXi-server. That makes me a bit nervous though, exactly what is happening there? The RH8 machine is slightly critical, and if anything messes up it'll likely result in many hours extra work. :( Another option I thought of was to boot a LiveCD on RH8-system and create a raw "dd dump" of the disk. The similar method is used to restore the image, I boot a LiveCD on the VM in ESXi and use "dd" to write it to disk. Is there any other option I could use? I'm using the cheap version of ESXi, hence I have no access to the Converter BootCD so these rather cumbersome methods is the only I can think of. :)

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• USB connection issue

  - by user1664417

  Currently Im facing an issue when Im trying to connect any usb flash drive to my pc. ok, below is what happens to me: 1) I can connect usb keyboard and mouse without any issue. 2) however when i connect usb flash drive, there are 2 situations that are occuring randomly a) there is no usb drive mount in my computer, when device manager is checked, it shows error code 10, but is shown in disk management. b) my computer will have usb drive mounted, but when I click on it, it is empty. on right click the properties, the disk space show 0. (there are files within the usb) what i have done is: 1) run CCleaner to repair the registry, restart and try, but still not working. 2) uninstall the drive in device manager, restart and try, but still not working. 3) tried the port that connects mouse and keyboard, but does not work. anyone who experienced these problems before please guide me. any suggestions or solutions would be greatly appreciated. Thanks, Tony

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• Can't boot into XP after setting up dual boot with Win 7 vhd.

  - by bebop

  I set up a dual boot for win 7 from vhd on 2 xp machines. One of them everything went fine, and I get the option to choose the os when I turn the machine on. The other was slightly different in that rather than seeing the current OS disk (the one with XP on) as the c:\ when I was setting up windows 7 vhd during install it saw the disk as d:. I didn't think anything of it and went ahead and created a vhd on the d: drive. Now when I turn this machine on, it boots straight to win7 and I never get the option to choose xp. When I look at the boot option in msconfig, I only see Windows 7. How can I go about adding the old XP drive as a boot option at startup again? Edit: Strangely when I rebooted this time (perhaps the first time since I removed the install DVD) it boots to XP. I suppose I'll just have to reinstall windows 7 again in a new vhd...

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• Linux Software Raid runs checkarray on the First Sunday of the Month? Why?

  - by mgjk

  It looks like Debian has a default to run checkarray on the first Sunday of the month. This causes massive performance problems and heavy disk usage for 12 hours on my 2TB mirror. Doing this "just in case" is bizzare to me. Discovering data out of sync between the two disks without quorum would be a failure anyway. This massive checking could only tell me that I have an unrecoverable drive failure and corrupt data. Which is nice, but not all that helpful. Is it necessary? Given I have no disk errors and no reason to believe my disks have failed, why is this check necessary? Should I take it out of my cron? /etc/cron.d# tail -1 /etc/cron.d/mdadm 57 0 * * 0 root [ -x /usr/share/mdadm/checkarray ] && [ $(date +\%d) -le 7 ] && /usr/share/mdadm/checkarray --cron --all --quiet Thanks for any insight,

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• Why obfuscating a serial number of a device? What is the risk?

  - by Horst Walter

  In one of my xx.stackexchange questions I've got an answer, in which the user has obfuscated his disk's SN (serial number). Recently I have seen this in several photos as well, the SN was blurred out. I' am just curious, because I have never paid attention to this. What could be the potential risk in publishing a device's SN? I do see some sense when it comes to a MAC address, OK, this could be used for tracking. But a SN of a disk, iPad, whatsoever? Maybe there is an important reason for not publishing it, which I haven't seen so far.

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• Robocopy to copy only new folders and files

  - by Valery Shampal

  A task: To find all new files and subfolders under some root folder (let us say Documents) and to copy them to other disk (j: in this case) Command line used: robocopy c:\users\valery\documents j:\robocopy /XO /E /MAXAGE:20131030 /XD Result: A full folders tree created. Only new files copyed, as supposed. It's good A point is, that I do not want to create all subfolders on a target disk, if there are no new files in them. Results are exeptable, but there is a lot of work to go through all folders and to find new files, as well, as to understand, what subfolders are a new ones Regards, Valery

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• VirtualBox: Grub sees hard drive, Linux does not

  - by thabubble

  I installed Linux on my second hard drive. I can boot to it just fine. But when I try to boot it from a Windows 7 host using http://www.virtualbox.org/manual/ch09.html#rawdisk, grub sees it and can load vmlinuz and initramfs. Log: :: running early hook [udev] :: running hook [udev] :: Triggering uevents... :: running hook [plymouth] :: Loading plymouth...done. ... Waiting 10 seconds for device /dev/disk/by-uuid/{root UUID} ... ERROR: device 'UUID={root UUID}' not found. Skipping fsck. ERROR: Unable to find root device 'UUID={root UUID}' It then drops me into a recovery shell. I checked "/etc/fstab" and it's empty, there are also no sd* devices in dev, the only thing in /dev/disk/by-id is a VBox CD device. I'm not too good with these kinds of things so help would be greatly appriciated.

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• end_request: I/O error, dev sda, sector xxxxxxxxx

  - by muruga

  I have a IBM server. This server contains 3 hard disk with RAID 5. It was working fine earlier. Unfortunately this machine got the following error message. After that I have rebooted the systems. After that I am getting the following error message in kern.log and demsg kernel: [65896.678870] end_request: I/O error, dev sda, sector 17430271 kernel: [69263.783957] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK : [69263.783957] sd 0:0:0:0: [sda] Sense Key : Hardware Error [current] kernel: [69263.783957] sd 0:0:0:0: [sda] Add. Sense: Internal target failure Whether it is kernel problem or hard disk problem or Raid problem

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• To Run Linux (Ubuntu) on Windows 7, is using Virtual PC one of the best ways?

  - by Jian Lin

  I need to try Linux (Ubuntu) and feel hesitant to install Ubuntu on top of a Win 7 machine to dual boot (might need to use Win7 and Ubuntu at the same time). Is creating a Virtual PC on Win7, and then installing the latest Ubuntu on that Virtual PC one of the better option? So I think I can create a Virtual PC with an empty virtual hard disk (vhd), say, for 30GB, and then put in the Ubuntu DVD-R or CD-R to install Ubuntu onto that empty hard disk. Update: for some reason, the first time Ubuntu 10.04 installation CD-R boots up, it asked for the Language, and "Install Ubuntu" and then the screen has vertical green bars and then the VPC just closed. The 2nd or 3rd time it booted up, there is no asking of Language or "Install Ubuntu" and just shut down the VPC, sometimes with vertical green bars. I even created another new hard drive and same thing happened. And created VPC 02, and same thing happened. Created VPC 03 with a fixed hard drive size of 60GB and same thing happened.

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• Why sizes are different, and what do they mean?

  - by Ramy

  I have a 1 TB hard drive that consists of one NTFS partition which I use to back up my data (no operating system). The size of all the data in it is : 726 GB, size on disk: 728 GB, and the used space when I check the properties is: 731 GB. There's a 5 GB difference between the size and the used space. Why is that huge difference there? What's the difference between these sizes? (size, size on disk, and used space) Is there a way to calculate the difference, and be sure the HDD is not messing around? Is that normal?

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• System reserved

  - by arun sidharth

  I have a HP laptop. I upgraded to windows 7 ultimate from home basic. Now I'm trying to upgrade to Windows 8 but when I do I get a message saying not enough system partition. So I opened the disk manager and increased the size of system reserved partition and it was of no use I still got the same error. Then I unfortunately deleted the 100MB system reserved partition by right clicking it and clicking format in the disk manager! Now I am not able to boot any CD's from the startup including OS and recovery CD. Whenever I press esc it always goes to the login screen and it doesn't say anything about the boot from CD option. Now I could not even use my recovery CD. I have 3 questions: Is it necesseary to create a system reserved partition if so how to create it? How to use my recovery cd How to install win 8

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• Are there webcam with their own IP address?

  - by Mawg

  I am looking for a small, rugged web-cam, which can be hand-held or perhaps mountable. It must have its own IP address so that anyone can view its video stream from a web browser. I would prefer 2 way voice communication too. Encryption of data is nice, as is compression (H.264). Maybe also remote control, like causing it to zoom from the browser. Does anyone have any suggestions, even suggestions of somewhere else to look?

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• What does the the reconstruction process of mdadm do exactly on raid10

  - by Azrael

  I've got a system with 4 disks set up as raid10. All disks are usable, and mdadm all states them with UUUU. Due to a recent system crash, the raid is currently reconstruction the raid as it was marked as "not clean," and a reconstruction process was started. On a closer look smartctl shows problems on one disk: sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 0:0:0:0: [sda] Sense Key : Medium Error [current] [descriptor] Descriptor sense data with sense descriptors (in hex): 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 24 cd 78 d4 sd 0:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed sd 0:0:0:0: [sda] CDB: Read(10): 28 00 24 cd 75 1e 00 04 00 00 With a research about the reconstruction process, I only found information concerning raid5 but nothing for raid10. Can I replace this problematic disk during the reconstruction process, or will I kill the raid with this?

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• Samba / smbd on Centos 6.5

  - by Satalink

  I've installed Samba4 and have the smb.conf file as follows: [global] workgroup = WORKGROUP server string = Samba Server realm = REXIALO.COM netbios name = REXIALO.COM security = user map to guest = Bad Password bind interfaces only = no interfaces = lo venet0 log file = /var/log/samba/samba.log max log size = 1000 [webroot] path = /usr/local/apache/htdocs comment = Example.com webroot directory read only = No I can connect from the same server with smbclient. Localhost: # smbclient -L localhost -U root Domain=[WORKGROUP] OS=[Unix] Server=[Samba 4.1.11] Sharename Type Comment --------- ---- ------- webroot Disk RexiAlo webroot directory IPC$ IPC IPC Service (RexiAlo Samba Server) Domain=[WORKGROUP] OS=[Unix] Server=[Samba 4.1.11] Server Comment --------- ------- Workgroup Master --------- -------Enter root's password: network: # smbclient -L rexialo.com -U Domain=[WORKGROUP] OS=[Unix] Server=[Samba 4.1.11] Sharename Type Comment --------- ---- ------- webroot Disk RexiAlo webroot directory IPC$ IPC IPC Service (RexiAlo Samba Server) Domain=[WORKGROUP] OS=[Unix] Server=[Samba 4.1.11] Server Comment --------- ------- Workgroup Master --------- ------- The problem is when I try to map to the smb webroot from Windows 7, it asks for user/pass but just times out and then prompts for credentials. The samba.log file does not show any activity other than the startup of the smbd process. Any help would be appreciated.

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• USB Format Error

  - by Dan Finan

  I'm having a real headache trying to reformat a USB drive. Initially it had a 200mb EFI partition and it caused the drive to disappear altogether. Since then I ran the CMD and wiped the disk using 'diskpart'. It took a few attempts but it finally cleaned the drive. Since then it has reappeared under (:E) however I am unable to access the drive and Windows is preventing me from reformatting it. I am just presented with 'Windows was unable to complete the format'. It's now acting like a CD drive instead of removable storage. I've tried going through Disk Management and I'm presented with the same error. I've removed the USB controllers from Device Manager - when the drive is connected again it re-installs the drivers and acts the same way. Any help given will be greatly appreciated, thank you. (Windows 7 machine)

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