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  • UPS vs Solar Power in case of power failure for a server [on hold]

    - by Zen 8000k
    I am looking for a low power, low end pc able to run 24/7 without overheating and a way to support it in case of power failure. Power failures can be up to 72 hours. The pc dosen't need a monitor or keyboard. A modem must also be protected in case of power failure. When i say low end, i don't mean crap. The cpu needs to be x86 and have at least 1k cpu in this chart: http://www.cpubenchmark.net/index.php What's the best way to do this? EDIT: more info. I need to run a home server. The server will perform light tasks mainly. A x86 cpu sadly is the only route for my use. I want to be able to run the server and the router/modem in case of power failure. Now, regarding how long the power will fail: 1) 1 hours is OK for most situations. (say 90%) 2) 3 hours is OK (say 98%) 3) 6 hours is more thank OK. (say 99.5%) 4) On extreme cases the power might fail days. I believe this is very unlikely to happen. More is great but, really, how ofter power will fail more than 3 hours? I believe once every year at best. Well, that's too rare to care about. Given the above, I am looking for a cost effective way to archive 1-3 hour power or 6 hour if possible. Solutions: You guys give me great ideas. 1) Power generator: no good as power will fail for 10 seconds before returning. Also I read online, "clean" power generators cost 1.5k+, so it's out of budged. Non clean generator might damage electronics, right? 2) Solar power: i don't know for sure about this. Sounds like a great idea, too good to be true, honestly. For only 200$ i get 100+w? What are the drawbacks here? 3) UPS: This seems to be the best. The only problem is the cost. Cost < 200$ = great 400$ = budged limit

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  • How to accelerate and notice failure of potentially faulty disks

    - by rainier
    Hey, I got a bunch of 'used' servers, whose disks should have been checked, but they have been shipped around the county in crate which can't help. I just had one disk go bad (despite being mirrored, currently trying to get more details). The server was fine for about a week before everything ground to a halt this afternoon. Is there any way 'accelerate' the failure of faulty disks, with the goal of bringing the disk to failure before we launch production services? Would doing lots of I/O with 'dd' or 'iozone' be a good way to test these potentially faulty disks? Any other tests/tools that would help recognized failures before they happen?

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  • Vnc viewer authentication failure

    - by Twosingleton
    I recently backed up my data and I had moved the vnc viewer executable from my PC to my portable hard disk. Realizing that I no longer had vnc, I got the latest one, but all of a sudden I could not connect to my server anymore and got authentification failure. So I moved the VNC exectuable back from my portable HD to my local HD. And I am still getting Authentification failure errors. I had a certain setup and I don't want to re-create it, do you know how I can recover or what happened to get auth failures all of a sudden ? I checked and the vncserver process is running fine. Old VNC viewer: vnc-4_1_3-x86_win32_viewer.exe New one:

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  • Why does apt-get fail to resolve the mirror?

    - by Jake Kubisiak
    I know this has been covered before, but I can't seem to resolve my issue. Here is my output. jake@KUBIE-SERVER:~$ sudo apt-get update Err http://us.archive.ubuntu.com precise InRelease Err http://us.archive.ubuntu.com precise-updates InRelease Err http://us.archive.ubuntu.com precise-backports InRelease Err http://security.ubuntu.com precise-security InRelease Err http://archive.canonical.com precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://archive.canonical.com precise Release.gpg Temporary failure resolving 'archive.canonical.com' Err http://ppa.launchpad.net precise Release.gpg Temporary failure resolving 'ppa.launchpad.net' Err http://security.ubuntu.com precise-security Release.gpg Temporary failure resolving 'security.ubuntu.com' Err http://us.archive.ubuntu.com precise Release.gpg Temporary failure resolving 'us.archive.ubuntu.com' Err http://us.archive.ubuntu.com precise-updates Release.gpg Temporary failure resolving 'us.archive.ubuntu.com' Err http://us.archive.ubuntu.com precise-backports Release.gpg Temporary failure resolving 'us.archive.ubuntu.com' Reading package lists... Done W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/InRelease W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise- updates/InRelease W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise- backports/InRelease W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/InRelease W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/precise/InRelease W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/Release.gpg Temporary failure resolving 'us.archive.ubuntu.com' W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise- updates/Release.gpg Temporary failure resolving 'us.archive.ubuntu.com' W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise- backports/Release.gpg Temporary failure resolving 'us.archive.ubuntu.com' W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise- security/Release.gpg Temporary failure resolving 'security.ubuntu.com' W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/Release.gpg Temporary failure resolving 'archive.canonical.com' W: Failed to fetch http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/precise/Release.gpg Temporary failure resolving 'ppa.launchpad.net' W: Some index files failed to download. They have been ignored, or old ones used instead. Any help is greatly appreciated.

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  • Windows Azure Directory Sync Generic Failure

    - by Armand
    Ok so I have a domain that I want to sync to Office365 but when I start the Windows Azure Active Directory Sync tool Configuration Wizard I get an error with the following details: System.Management.ManagementException: Generic failure at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode) at System.Management.ManagementObjectCollection.ManagementObjectEnumerator.MoveNext() at Microsoft.Online.DirSync.Common.MiisAction.GetTargetMA() at Microsoft.Online.DirSync.Common.MiisAction.IsSyncInProgress() at Microsoft.Online.DirSync.Common.PrerequisiteChecks.ThrowIfSyncInProgress() at Microsoft.Online.DirSync.UI.IntroductionWizardPage.PrerequisiteValidation() at Microsoft.Online.DirSync.UI.IntroductionWizardPage.OnLoad(EventArgs e) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.WmShowWindow(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) I have searched far and wide to no avail, this happens before I can even enter any details. A few notes: The server is not the domain controller Sharepoint 2013 is installed on this server The account I log in with and run the application with is a domain and enterprise admin I right click and run as administrator when I start the application So when I click continue on the error and go through the steps I get two possible scenarios that change from time to time at now predictable rate: 1) I just get an error, generic failure. 2) I get an error "Cannot start service MSOnlineSyncScheduler on computer '.'." Any help?

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  • Smart Array P400 - Accelerator Replacement Battery Failure

    - by inflammable
    TL;DR - Is the immediate failure of a replacement battery, for a failed battery, on a battery backed accelerator for a Smart Array P400 controller a common occurrence? Or are we likely to have an storage controller with an impending and critical fault? We have a slightly confusing situation with a Smart Array P400 storage controller with the 512mb battery backed accelerator addon on an HP DL380 server. The storage controller is (afaik) running the latest firmware and driver: Model: Smart Array P400 Controller Status: OK Firmware Version: 7.24 Serial Number: *snip* Rebuild Priority: Medium Expand Priority: Medium Number Of Ports: 2 The storage diagnostic (both on the both boot-up screen for the controller and within the 'Management Homepage' and the 'HP Array Diagnostic Utility') recently starting showing the following status a fault for the battery for the accelerator: Accelerator Status: Temporarily Disabled Error Code: Cache Disabled Low Batteries Serial Number: *snip* Total Memory: 524288 KB Read Cache: 25% Write Cache: 75% Battery Status: Failed Read Errors: 0 Write Errors: 0 We replaced the battery with a new unit (a visual inspection of the P400 card showing nothing unusual) and saw the same fault - but expected this to disappear over the course of a few hours/days as it charged. This didn't happy, and the fault status remains the same as above. Given the battery is a genuine part from HP, I wouldn't have expected a replacement battery to fail straight away, or to be dead-on-arrival (is that naivety on my part?). Is the immediate failure of a replacement battery, for a failed battery, on a battery backed accelerator a common occurrence? Or are we likely to have an storage controller with an impending and critical fault? Is there any diagnostic that could tell me more about the failed battery, without cracking the server open again? Many thanks!

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  • SSL23_WRITE:ssl handshake failure:s23_lib.c:177

    - by Armin
    When attempting to connect to an xmpp server over SSL, openssl fails with the following error: 3071833836:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:177 I believe that the server uses the RC4-MD5 cipher, here is the full output: [root@localhost ~]# openssl s_client -connect 184.106.52.124:5222 -cipher RC4-MD5 CONNECTED(00000003) >>> SSL 2.0 [length 0032], CLIENT-HELLO 01 03 03 00 09 00 00 00 20 00 00 04 01 00 80 00 00 ff b0 c9 c2 3f 0b 0e 98 df b4 dc fe b7 e8 8f 17 9a 34 b5 9b 17 1b 2b ac 01 dc bd 2b a9 2d 18 44 0c 3071866604:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:177: --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 0 bytes and written 52 bytes --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE --- Using gnutls-cli: [root@localhost ~]# gnutls-cli 184.106.52.124 -p 5222 Resolving '184.106.52.124'... Connecting to '184.106.52.124:5222'... *** Fatal error: A TLS packet with unexpected length was received. *** Handshake has failed GNUTLS ERROR: A TLS packet with unexpected length was received. Connecting to the same server on port 5223 works fine. Using OpenSSL 1.0.1e-fips on CentOS 6.5 and OpenSSL 1.0.1f on Ubuntu 14.04.1 Any tips on how to troubleshoot this? Thanks in advance.

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  • Kerberos service on win2k dc will not start following disk failure

    - by iwilson68
    Hi, I have a win2k (mixed mode domain) with 4 DCS. One of these also acts an exchange 2000 server which uses 2 logical volumes from an MSA 2000 array. AD etc is stored on local drives. We experienced a problem last week when the raid array fell back to a redundant controller and this temporarily meant that the two logical drives were not visible to the server for around 5 minutes and a couple of reboots. The log records these Events as Type: Warning Event Source: Disk Event Category: None Event ID: 51 Date: 06/11/2009 Time: 11:46:23 User: N/A Computer: server1 Description: An error was detected on device \Device\Harddisk1\DR1 during a paging operation. Following these problems, the server “kerberos Key Distribution” service refuses to start with an “error.31 a device attached to the system is not functioning”. All other automatic start services (including net logon) are running and there are no DNS issues etc. All devices are also functioning but the two logical MSA disks are now numbered in the Windows Disk Management MMC as 2 and 4 and I suspect that they may have previously been identified as disks 1 & 2 and perhaps windows still sees this as an ongoing failure?? Replication has not been affected but obviously there are many audit failures in the security log relating to users and workstations presumably linked to the Kerberos issue. Attempting to manually start the kerberos service generates the following in the System Log. Event Type: Error Event Source: Service Control Manager Event Category: None Event ID: 7023 Date: 09/11/2009 Time: 09:46:55 User: N/A Computer: Server1 Description: The Kerberos Key Distribution Center service terminated with the following error: A device attached to the system is not functioning. DCDIAG passes all tests except “Advertising” and “Services” which I believe relate directly to the failure of Kerberos only. Any advice would be appreciated.

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  • Configuring MySQL for Power Failure

    - by Farrukh Arshad
    I have absolutely no experience with databases and MySql. Now the problem is I have an embedded device running a MySQL database with a web based application. The problem is when I shutdown my embedded device it just cut off the power, and I can not have a controlled shutdown. Given this situation how can I configure MySql to prevent it from failures and in case of a failure, I should have maximum support to recover my database. While searching this, I came across InnoDB Engine as well as some configuration options to set like sync_binlog=1 & innodb_flush_log_at_trx_commit=1. I have noticed my default Engine is InnoDB and binary logs are also enabled. What are other configurations to make for best possible failure & recovery support. Updated: I will be using InnoDB engine which supports Transactions. My question is how best I can configure it (InnoDB + MySQL) so that it can provide best possible fail-safe as well as crash recovery mechanism. One configuration option I came across is to enable binary logging which InnoDB uses at the time of recovery. Regards, Farrukh Arshad

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  • Software for RAID Failure Alerts?

    - by QF_Developer
    I have two 256 GB Samsung 840 Pro SSD disks in a RAID 1 array. I would like to receive a notification if one of the disks in the array fails. Can anybody recommend an application I can install on the server to fire an email if such an event occurs? Here are some additional specs: Supermicro X9SCM-IIF motherboard utilising the hardware RAID controller. OS = Windows 2012 Standard Also is it possible to simulate a disk failure by pulling it out of the bay? SSDs appear to fail close together when in a mirrored config so I'd like to know ASAP if one goes down so I can swap them out with minimum delay. UPDATE 26th June 2013 ------------------------ None of the software that ships with the Supermicro X9SCM-* motherboards offer support for RAID monitoring. As has been pointed out here, these boards are built on an Intel chipset for RAID and so I installed Intel Rapid Storage Technology that supports automated email notifications on RAID failure http://www.intel.com/support/chipsets/imsm/sb/cs-020784.htm One small issue, the software only allows you to send email notifications without SMTP authentication. There's a bunch of different workarounds here: http://communities.intel.com/thread/30771

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  • Email delivery failure - bounceback address

    - by user808532
    I've been looking for documentation on the standard behaviour for mail servers who fail to deliver their mail. I want the 'From' field to be different from the account that receives emails when there is a delivery failure. E.g. My program sends an email from '[email protected]', and on failure to deliver I want to be sent the delivery failure bounceback at '[email protected]'. Is this accomplished by setting the reply-to? Or should I login with the 'failedemails' account and therefore it will receive the email back? Thanks.

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  • VHD Boot failure in Hyper-V (Win7 boot from vhd)

    - by stuck_again
    I've have a virtual machine with a VHD image that I've copied from Windows 7 to the Hyper-V server. This image was created on Windows 7 (Windows 7 64-bit), and I'm using it on Windows 7 as boot image. Starting this virtual machine with the Hyper-V Manager gives this error: "Boot failure. Reboot and Select proper Boot device or Insert Boot Media in selected Boot device." What do I need to do to boot from this vhd in Hyper-V?

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  • Microsoft deployment toolkit 2010 failure message

    - by elhombre
    Hi all I am having a problem with the deployment of Windows 7 from a server with Microsoft Toolkit 2010. When deployment has finished I get a Windows error report which shows following message. FAILURE (Er): 70: CreateObject(Microsoft.BDD.Utility) - Permission denied Litetouch deployment failed, Return Code = - 2147023589 0x8007051B I don't get it what Microsoft.BDD.Utility is exactly and when this utility is used (Tasksequence?) ? Can anyone help me on this problem?

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  • ssh: "Agent admitted failure to sign using the key"

    - by takeshin
    I'm trying to set up password-less login with ssh on Ubuntu Server, but I keep getting: Agent admitted failure to sign using the key and prompt for password. I have generated new rsa keys. Before the system reboot it worked just fine. All the links lead me to this bug, but nothing works. SSH Agent is still not running. How to fix that? Maybe the files need specific permissions?

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  • Debian 7: "Failure of key exchange and association"

    - by pyrogoggles
    I'm installing Debian using the Live CD with GNOME and the non-free packages. The internet works just fine when using the live CD, but when you try to open the installer and select a network, it gives me the error of "Failure of key exchange and association". I've put everything in right, and tried multiple times. However, it never works. Am I just going to have to use ethernet to install? Thanks, people.

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  • Partition is gone after power failure

    - by David
    Just had a power failure and am just going through my 4 usbdisks to remount them and found that 1 (the most important one) is coming back as 'doesn't contain a valid partition table'. What can I do to try to repair the disk and hopefully retrieve the partition? Lukily I do nightly backups. but would like to get what was there today if possible.

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  • S.M.A.R.T. Hard drive failure test?

    - by mandroid
    I'm working on my mom's computer and she freaked because it told her "There was an imminent hard drive failure about to occurr." I did some digging and found it was related to the S.M.A.R.T. technology in the hard drive. The message appears every time you boot, but it will still let you boot into Windows and every thing seems fine. How serious are these warning messages? Do we really need to immediately replace the hard drive?

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  • Telnet disconnected on login failure

    - by LinuxPenseur
    Hi, I have two servers running Linux 2.6.9 kernel. When i telnet to server1 , the telnet will be disconnected only after 3 login failures. While, when i telnet to server2, telnet will be disconnected after the first login failure. I expect server2 to behave the same way as server1 when telnet is executed. Kindly tell me where i should tweak my servers so that i could achieve what i expect. Thanks, LinuxPenseur

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  • Sparsity Failure

    - by Lijo
    Hi Team, In the context of data warehouse, could you please explain "Sparsity Failure" of aggregate tables? It would be great if you can explain it with product sales in a store; aggregated by week. It could be easily understood if it is having schema as well as sample data. Thanks Lijo

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  • What happens in case of utility power failure?

    - by Jake
    (in the office) Today, the UPS battery replace warning light lit up and there was a slight panic as the all the technical people will not be around the next few days. But after thinking a bit further, I realise that in case of power failure, no client computers will be able to turn on in the first place and operations will be disrupted regardless of whether the UPS keeps the server up. This makes me wonder if the UPS is really such a critical component? What do you think?

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  • Failure Scenarios in IP networks [closed]

    - by Karthik
    I am searching for a list of faults that may occur in a traditional IP network. To give you a better understanding of what I am looking for: For an MPLS-IP network the set of faults may be something as given in this cisco site. I want pointers to such kind of faults for a traditional IP network. Individual suggestions from you are welcome, but in doing so, please also provide a link to the official site from which you came with those failure scenarios.

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  • Samsung SSD SMART failure warning on macbook proA

    - by user37303
    My 9 month old 256GB Samsung SSD is now reporting the following SMART failures: Rsvd_Blk_Cnt_Chip FAILING NOW 184 Available_Reservd_Space FAILING NOW 20 Can anyone explain the meaning of these two attributes that appear to be failing (Rsvd_Blk_Cnt_Chip and Available_Reservd_Space? Also, also aren't SSDs much more immune to these types of failures? Everything seems to be working fine now, but I'm fearful of a looming failure.

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