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Articles indexed Monday May 26 2014

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  • Remove server from loadbalancer [on hold]

    - by Cris
    Our datacenter is load balancing the traffic to our weblogic servers based on an application deployed on each server called probe.ear It is a simple java app which is accessed by the loadbalancer and if it accessible it will redirect traffic to this server as well. When we want to remove one node from the loadbalancer we just stop the probe app and new traffic is not redirected to it BUT I am asking myself what about the current requests? The responses for the current requests are executed (completed). I did not had time to test (will do that first thing when go back to work) but on theoretical level for me it make sense to do so unless the loadbalancer has some special settings. Does my reasoning make sense to you? Just to make it clear since it was reported the question is not clear. Is there a way to configure a load balancer in a way that from a specific moment will not redirect traffic to a certain server without reseting the current requests ?

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  • Change Block Tracking settings not retained for a VM on VMWare 5.5

    - by Chris
    I'm trying to enable Change Block Tracking as per this VMWare KB article but the setting ctkEnabled is not being retained in the advanced options or being added to the vmx file. The setting scsi0:0.ctkEnabled is being retained and I see a file vmname-ctk.vmdk in the datastore. I've verified that the vm doesn't have any snapshots but don't see any other suggestions in the KB (or google, of course.) Edit: The last comment on this community post. It's a slightly different circumstance, but suggests that there is an known bug editing these settings in the web-gui.

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  • Combine drivers from multiple Win7 installs to single image

    - by MikeyB
    I need to prepare a Windows 7 image with drivers for multiple systems (Lenovo laptops). I currently have an image prepared on one laptop type but need to grab the drivers appropriate for the other laptop types as well to ensure that it works on all systems. From what I can tell, the procedure will be: create a boot CD with imageX take a .wim image prepared on the first type of systems take .wim images from the other systems mount the other images in WAIK extract the drivers from the other images inject the drivers into the first .wim boot a system with the boot CD and redeploy the updated .wim image into the Windows partition take an image of the drive with usual imaging tools This all seems a little too convoluted, but I'm willing to do it to get the proper drivers into the image. This is (seemingly) necessarily complicated by having more than one OS on the disk image. Am I on the right track?

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  • Exim To Include Internal Email When Sending

    - by user219951
    I wonder if you can help me out... at the moment were using exim to relay our emails to an smtp_relay. The only problem is if the user exists and has an email address it won't exit the server and send them mail using our relay. I need it to go to the relay even if it's an internal email address. Hope that make sense, this is how we have got our relay setup at the moment smart_route: driver = manualroute domains = !+local_domains transport = remote_smtp_smtpauth route_list = * smtp.sendgrid.net:587 Thanks

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  • Replicate From OpenDJ to OpenLDAP?

    - by Joel K
    I am considering retiring some of our older OpenDJ LDAP servers and replacing with OpenLDAP. (seems to be more widely supported) I am wondering if it's possible to replicate directly from OpenDJ to OpenLDAP as an interim solution to remove the OpenDJ slaves and then flip the master over later. Is LDAP replication implementation specific or more general? I guess I'll have to just go give it a try, but I was looking for advice from someone who's been down this road.

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  • Ubuntu 13.10 - How to disable LVM and cryptsetup? cryptsetup: evms_activate is not available

    - by NeverEndingQueue
    I am trying to remove whole drive encryption from my Ubuntu installation. I've run Ubuntu from Live CD, mounted crypt partition and copied it to another partition /dev/sda3. sudo cryptsetup luksOpen /dev/sda5 crypt1 sudo dd if=/dev/ubuntu-vg/root of=/dev/sda3 bs=1M After that I've run boot-repair: https://help.ubuntu.com/community/Boot-Repair Added entry to /etc/fstab: UUID=<uuid> / ext4 errors=remount-ro 0 1 Of course I've replaced with blkid result of my /dev/sda3. I've also deleted overlayfs and tmpfs lines from /etc/fstab. (I've just compared it to content of /etc/fstab in non-encrypted Ubuntu installation and could not find overlayfs and tmpfs). I've chrooted from LiveCD into my system and rebuilt initramfs: http://blog.leenix.co.uk/2012/07/evmsactivate-is-not-available-on-boot.html I've also removed cryptsetup using apt-get remove. Basically I can easily mount my system partition from Live CD (without setting up the encryption and LVM stuff), but can not boot from it. Instead I see: cryptsetup: evms_activate is not available When I've chosen the Recovery mode I've seen this: Begin: Mounting root file system ... Begin: Running /script/local-top ... Reading all physical volumes. This may take a while ... No volume groups found cryptsetup: evms_activate is not available Begin: Waiting for encrytpted source device ... My /etc/crypttab is empty. I am pretty sure that system tries to find encrypted partition, search for LVMs etc. Do you have ideas what could be the problem or how can I fix it? Thanks

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  • How can I implement ansible with per-host passwords, securely?

    - by supervacuo
    I would like to use ansible to manage a group of existing servers. I have created an ansible_hosts file, and tested successfully (with the -K option) with commands that only target a single host ansible -i ansible_hosts host1 --sudo -K # + commands ... My problem now is that the user passwords on each host are different, but I can't find a way of handling this in Ansible. Using -K, I am only prompted for a single sudo password up-front, which then seems to be tried for all subsequent hosts without prompting: host1 | ... host2 | FAILED => Incorrect sudo password host3 | FAILED => Incorrect sudo password host4 | FAILED => Incorrect sudo password host5 | FAILED => Incorrect sudo password Research so far: a StackOverflow question with one incorrect answer ("use -K") and one response by the author saying "Found out I needed passwordless sudo" the Ansible docs, which say "Use of passwordless sudo makes things easier to automate, but it’s not required." (emphasis mine) this security StackExchange question which takes it as read that NOPASSWD is required article "Scalable and Understandable Provisioning..." which says: "running sudo may require typing a password, which is a sure way of blocking Ansible forever. A simple fix is to run visudo on the target host, and make sure that the user Ansible will use to login does not have to type a password" article "Basic Ansible Playbooks", which says "Ansible could log into the target server as root and avoid the need for sudo, or let the ansible user have sudo without a password, but the thought of doing either makes my spleen threaten to leap up my gullet and block my windpipe, so I don’t" My thoughts exactly, but then how to extend beyond a single server? ansible issue #1227, "Ansible should ask for sudo password for all users in a playbook", which was closed a year ago by mpdehaan with the comment "Haven't seen much demand for this, I think most people are sudoing from only one user account or using keys most of the time." So... how are people using Ansible in situations like these? Setting NOPASSWD in /etc/sudoers, reusing password across hosts or enabling root SSH login all seem rather drastic reductions in security.

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  • nginx symlinks permission denied / 403 Forbidden on Mac OSX

    - by Levi Roberts
    So I have an nginx server running on Mac OSX and I am trying to create a symlink in my nginx www directory from somewhere else. In the browser I get the wonderful 403 Forbidden error. I have also tried chmod'ing my life away for the past few hours. There doesn't seem to be anything on the stack about it. One thing concerns me is that I am not sure if symlinks are directly supported by ngninx on Mac. Trying to use disable_symlink directive results in: nginx: [emerg] unknown directive "disable_symlinks" in /usr/local/etc/nginx/nginx.conf:44` Some info about my setup: nginx -v : nginx version: nginx/1.4.2 To create the symlink I do the following: cd /Users/levi/www ln -s "/Users/levi/Desktop/.../client" "/Users/levi/www/client" The error in the log: [error] 11864#0: *7 open() "/Users/levi/www/client" failed (13: Permission denied), client: 127.0.0.1, server: _, request: "GET /client HTTP/1.1", host: "localhost" Any help is much appreciated. Let me know if there's any more information I can give you.

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  • enable/disable ntp service on ubuntu 12.04

    - by ntphelp
    Our application runs on Ubuntu 12.04 Precise. On this server, we have both ntpdate and ntp. How to enable and disable the NTP service on-demand? I tried # sudo update-rc.d -f ntp remove/default and # sudo update-rc.d ntp enable/disable commands, but when I reboot server the ntp service starts running! I suspect ntpdate is starting ntp service on reboot. I removed ntpdate package from one of my experimental server, then ntp didn't start on reboot after issuing: # update-rc.d ntp disable Is there a way to control this? or is there way to permanently disable ntpdate?

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  • In Exim, is RBL spam rejected prior to being scanned by SpamAssassin?

    - by user955664
    I've recently been battling spam issues on our mail server. One account in particular was getting hammered with incoming spam. SpamAssassin's memory use is one of our concerns. What I've done is enable RBLs in Exim. I now see many rejection notices in the Exim log based on the various RBLs, which is good. However, when I run Eximstats, the numbers seem to be the same as they were prior to the enabling of the RBLs. I am assuming because the email is still logged in some way prior to the rejection. Is that what's happening, or am I missing something else? Does anyone know if these emails are rejected prior to being processed by SpamAssassin? Or does anyone know how I'd be able to find out? Is there a standard way to generate SpamAssassin stats, similar to Eximstats, so that I could compare the numbers? Thank you for your time and any advice. Edit: Here is the ACL section of my Exim configuration file ###################################################################### # ACLs # ###################################################################### begin acl # ACL that is used after the RCPT command check_recipient: # to block certain wellknown exploits, Deny for local domains if # local parts begin with a dot or contain @ % ! / | deny domains = +local_domains local_parts = ^[.] : ^.*[@%!/|] # to restrict port 587 to authenticated users only # see also daemon_smtp_ports above accept hosts = +auth_relay_hosts condition = ${if eq {$interface_port}{587} {yes}{no}} endpass message = relay not permitted, authentication required authenticated = * # allow local users to send outgoing messages using slashes # and vertical bars in their local parts. # Block outgoing local parts that begin with a dot, slash, or vertical # bar but allows them within the local part. # The sequence \..\ is barred. The usage of @ % and ! is barred as # before. The motivation is to prevent your users (or their virii) # from mounting certain kinds of attacks on remote sites. deny domains = !+local_domains local_parts = ^[./|] : ^.*[@%!] : ^.*/\\.\\./ # local source whitelist # accept if the source is local SMTP (i.e. not over TCP/IP). # Test for this by testing for an empty sending host field. accept hosts = : # sender domains whitelist # accept if sender domain is in whitelist accept sender_domains = +whitelist_domains # sender hosts whitelist # accept if sender host is in whitelist accept hosts = +whitelist_hosts accept hosts = +whitelist_hosts_ip # envelope senders whitelist # accept if envelope sender is in whitelist accept senders = +whitelist_senders # accept mail to postmaster in any local domain, regardless of source accept local_parts = postmaster domains = +local_domains # accept mail to abuse in any local domain, regardless of source accept local_parts = abuse domains = +local_domains # accept mail to hostmaster in any local domain, regardless of source accept local_parts = hostmaster domains =+local_domains # OPTIONAL MODIFICATIONS: # If the page you're using to notify senders of blocked email of how # to get their address unblocked will use a web form to send you email so # you'll know to unblock those senders, then you may leave these lines # commented out. However, if you'll be telling your senders of blocked # email to send an email to [email protected], then you should # replace "errors" with the left side of the email address you'll be # using, and "example.com" with the right side of the email address and # then uncomment the second two lines, leaving the first one commented. # Doing this will mean anyone can send email to this specific address, # even if they're at a blocked domain, and even if your domain is using # blocklists. # accept mail to [email protected], regardless of source # accept local_parts = errors # domains = example.com # deny so-called "legal" spammers" deny message = Email blocked by LBL - to unblock see http://www.example.com/ # only for domains that do want to be tested against RBLs domains = +use_rbl_domains sender_domains = +blacklist_domains # deny using hostname in bad_sender_hosts blacklist deny message = Email blocked by BSHL - to unblock see http://www.example.com/ # only for domains that do want to be tested against RBLs domains = +use_rbl_domains hosts = +bad_sender_hosts # deny using IP in bad_sender_hosts blacklist deny message = Email blocked by BSHL - to unblock see http://www.example.com/ # only for domains that do want to be tested against RBLs domains = +use_rbl_domains hosts = +bad_sender_hosts_ip # deny using email address in blacklist_senders deny message = Email blocked by BSAL - to unblock see http://www.example.com/ domains = +use_rbl_domains senders = +blacklist_senders # By default we do NOT require sender verification. # Sender verification denies unless sender address can be verified: # If you want to require sender verification, i.e., that the sending # address is routable and mail can be delivered to it, then # uncomment the next line. If you do not want to require sender # verification, leave the line commented out #require verify = sender # deny using .spamhaus deny message = Email blocked by SPAMHAUS - to unblock see http://www.example.com/ # only for domains that do want to be tested against RBLs domains = +use_rbl_domains dnslists = sbl.spamhaus.org # deny using ordb # deny message = Email blocked by ORDB - to unblock see http://www.example.com/ # # only for domains that do want to be tested against RBLs # domains = +use_rbl_domains # dnslists = relays.ordb.org # deny using sorbs smtp list deny message = Email blocked by SORBS - to unblock see http://www.example.com/ # only for domains that do want to be tested against RBLs domains = +use_rbl_domains dnslists = dnsbl.sorbs.net=127.0.0.5 # Next deny stuff from more "fuzzy" blacklists # but do bypass all checking for whitelisted host names # and for authenticated users # deny using spamcop deny message = Email blocked by SPAMCOP - to unblock see http://www.example.com/ hosts = !+relay_hosts domains = +use_rbl_domains !authenticated = * dnslists = bl.spamcop.net # deny using njabl deny message = Email blocked by NJABL - to unblock see http://www.example.com/ hosts = !+relay_hosts domains = +use_rbl_domains !authenticated = * dnslists = dnsbl.njabl.org # deny using cbl deny message = Email blocked by CBL - to unblock see http://www.example.com/ hosts = !+relay_hosts domains = +use_rbl_domains !authenticated = * dnslists = cbl.abuseat.org # deny using all other sorbs ip-based blocklist besides smtp list deny message = Email blocked by SORBS - to unblock see http://www.example.com/ hosts = !+relay_hosts domains = +use_rbl_domains !authenticated = * dnslists = dnsbl.sorbs.net!=127.0.0.6 # deny using sorbs name based list deny message = Email blocked by SORBS - to unblock see http://www.example.com/ domains =+use_rbl_domains # rhsbl list is name based dnslists = rhsbl.sorbs.net/$sender_address_domain # accept if address is in a local domain as long as recipient can be verified accept domains = +local_domains endpass message = "Unknown User" verify = recipient # accept if address is in a domain for which we relay as long as recipient # can be verified accept domains = +relay_domains endpass verify=recipient # accept if message comes for a host for which we are an outgoing relay # recipient verification is omitted because many MUA clients don't cope # well with SMTP error responses. If you are actually relaying from MTAs # then you should probably add recipient verify here accept hosts = +relay_hosts accept hosts = +auth_relay_hosts endpass message = authentication required authenticated = * deny message = relay not permitted # default at end of acl causes a "deny", but line below will give # an explicit error message: deny message = relay not permitted # ACL that is used after the DATA command check_message: accept

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  • CentOS 6: Can not start NFS

    - by Chris
    I am unable to start the NFS service. When starting there is no error. But the services are stopt after it. No messages at all in /var/log/messages. Same happens to rpcbind serivce. Any idea what this could be? I also tried to disable iptables. [[email protected] ~]# service nfs start [[email protected] ~]# service nfs status rpc.svcgssd is stopped rpc.mountd is stopped nfsd is stopped rpc.rquotad is stopped [[email protected] ~]# service rpcbind start [[email protected] ~]# service rpcbind status rpcbind is stopped [[email protected] ~]# cat /etc/exports /tmp *(ro) [[email protected] ~]# chkconfig --list | egrep '(rpcbind|nfs)' nfs 0:off 1:off 2:on 3:on 4:on 5:on 6:off nfslock 0:off 1:off 2:on 3:on 4:on 5:on 6:off rpcbind 0:off 1:off 2:on 3:on 4:on 5:on 6:off

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  • Windows Server 2003 not automatically assigning drive letter to external drives

    - by Chris
    My newly rebuilt Windows Server 2003 doesn't automatically assign drive letters to external usb devices. I have to manually open the Disk Management Console and assign it a drive letter every time. It does this with two different drives in all USB ports. I have been doing some reading and I don't have any network drives, I have also already tried USBDLM and it doesn't seem to have made any difference. Specs: ProLiant ML150 G5 with Windows 2003 Enterprise and all updates installed. Any ideas on what I can try to resolve this problem would be greatly appreciated. Chris

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  • InnoDb Overhead?

    - by Rimary
    I just converted several large tables from MyISAM to InnoDB. When I view the tables in phpMyAdmin, they are showing a significant amount of overhead (One table has 6.8GB). Optimizing the tables (which isn't a supported command on InnoDB) has no affect like it does on MyISAM. Is this a result of InnoDB having the ever growing data file that never returns space even after deletes? If that's the case, I've never seen overhead like this before from other InnoDB tables. Is there a way to clean this up? Edit: Here are the things I've tried (with no success): Optimize Table Reorder table by primary key Defragment table

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  • How to overcome Local Group Policy Editor's 1023 character limit?

    - by Louis
    I want to reorder the SSL Cipher Suite Order applied as part of KB2919355, prioritizing the forward secrecy suites above all else. Trying to do this with gpedit at Computer Configuration Administrative Templates Network SSL Configuration Settings SSL Cipher Suite Order is a problem because the new list goes over the tool's character limit. Is there anyway to overcome this limit so I don't have to keep the current priority or omit something from the list?

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  • How can I change the file name of the Program Files (x86) folder?

    - by Madrauk
    Let me stop you before the "you shouldn't do that" and "you will corrupt your file paths". I know what I'm doing, but I'll give you the story to convince you. Basically, my hard drive is failing to the point where programs installed on it are not responding consistently. So, in preparation for my replacement, I'm moving as many files as possible to my secondary because the new drive will be smaller (it's an emergency I can't buy a fancy expensive new drive) and so I can actually use my computer until the new drive comes in. The basic idea behind what I'm doing is I've copied the contents of the Program Files x86 folder to another spot on my other drive, and I want to replace the original folder in the C drive with a symbolic link that points to the other drive, so the programs can run from that drive and be fine but it will save space on my C drive and simplify the moving process when the new one comes in. To do that, I need to rename the program files folder, make the symbolic link, hopefully delete the program files folder, then restart my computer so all the programs are running properly and I can confirm it works. Now that I've told you why, can anyone help me out?

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  • WinPcap/Wireshark install: where is packet.ddl?

    - by Annonomus Penguin
    I have Wireshark installed, and I'm getting this error: The NPF driver isn't running. You may have trouble capturing or listing interfaces. I realize this is something to do with WinPcap. It's not in control panel, as the FAQ states it should be. I've tried installing it, and it says that there is a previous version installed. This leaves me to believe this is the problem: To be absolutely sure that WinPcap has been installed, please look at your system folder: you should find files called packet.* and wpcap.dll. Please check the file dates: these should be compatible with the WinPcap release dates. We've had reports of trojans or other malware that silently install the WinPcap driver, NPF.sys. If you've been infected by them, you'll probably see the driver file in Windows\System32\Drivers, but no entries in the "Add or Remove Programs" applet and no dlls. I've searched my hard drive, but the only path is this: C:\Windows\SysWOW64\packet.dll Is this the file they are talking about? Should I delete this file? I'm not quite sure, so I thought I'd verify that this file is the right one.

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  • All browsers crash when file uploading or downloading dialog opens up

    - by Mitulát báti
    I pretty much summarized the problem in the title. I tried to get some solutions. All I found was check if the Chrome has any concurrent or erroneous applications installed on my computer that conflicts with Chrome (by typing chrome://conflicts). But "unfortunately" it said that there are no perceived conflicts. First I thought it is only with Chrome, but soon I saw that no. All internet browsers are affected. I noticed this problem after I installed Fruity Loops, but uninstalling it didn't solve the problem. Maybe Fruity loops is not the guilty reason. Have any of you met this problem before? What should I do? Thank you. UPDATE: Sorry I forgot that this is under Windows 8.1.

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  • Media Player is missing from the list in "Turn Windows features on or off"

    - by arsaKasra
    I decided to reinstall Media Player in Vista [this way], so I figured I should turn it off as a Windows feature. But when I continue with the procedure, I get an incomplete list of features, here's an image: I looked around a bit, wondering if that is only an option available in 7, and I have seen people saying different things. So, is this only available for 7 or is there something wrong going on here? Can I make Media Player to show up in here? I am on a Toshiba Satellite A100 with Vista Home Premium OEM. I don't have my recovery disks or any restore point. Just to mention, I currently do have Media Player and it's working fine. Sorry if I can't think of any more details to add, please ask me for anything I should have included.

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  • Batch file to check the size and print the outout

    - by OraR
    I am trying to make a batch file and that would check the size of f1.txt file and if the size is 1118 then no changes will be displayed if not the file has been changed. @ECHO OFF set maxbytesize=1118 set "filename=f1.txt" for %%A in (%filename%) do echo.Size of "%%A" is %%~zA bytes if %%~zA==%maxbytesize% ( echo "No Changes" pause >nul exit ) echo "Changes" pause >nul exit Please can someone let me know any possible guidelines for the above. Thanks.

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  • How to configure Windows 8.1 start screen search?

    - by AlexV
    I'm using Windows 8.1 and when you are in the "start screen" (where all the tiles are), if you type something, a search panel appears on the right side with search results. In 8.0 it searched within "start menu" shortcuts and control panel elements only (if I remember correctly). In 8.1 it now search "start menu" shortcuts, my library and files and no longer control panel items. Is there a way to configure this? I use this search solely to locate a "start menu" shortcut and/or control panel element, so I would like to narrow my search to only this.

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  • Replace files with symlink

    - by soandos
    This question is intended to be the inverse of Replace Symbolic Links with Files, but for windows. I have started running out of space on my SSD drive, and I found that about 12% of used space is in my installer folder (holds the .msi files for all the programs that I have installed) I am looking for two things: A way to move this (or any) folder via symlink. Ideally, some powershell function that I could use to just designate a folder, a destination, and the symlink would be created in the original (pointing to the destination) In this particular case, a registry change that would allow the location to be move would also be helpful, but I would still prefer solution 1. How can this be done?

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  • mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?

    - by EXIT_FAILURE
    My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. This was so that windows (or I) wouldn't inadvertently mess it up. However, and in retrospect, foolishly, I left the RAID disks connected, thinking that windows wouldn't be so ridiculous as to mess with a HDD that it sees as just unallocated space. Boy was I wrong! After copying over the installation files to the SSD (as expected and desired), it also created an ntfs partition on one of the RAID disks. Both unexpected and totally undesired! . I changed out the SSDs again, and booted up in linux. mdadm didn't seem to have any problem assembling the array as before, but if I tried to mount the array, I got the error message: mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so dmesg: EXT4-fs (md0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 1318081259)! EXT4-fs (md0): group descriptors corrupted! I then used qparted to delete the newly created ntfs partition on /dev/sdd so that it matched the other three /dev/sd{b,c,e}, and requested a resync of my array with echo repair > /sys/block/md0/md/sync_action This took around 4 hours, and upon completion, dmesg reports: md: md0: requested-resync done. A bit brief after a 4-hour task, though I'm unsure as to where other log files exist (I also seem to have messed up my sendmail configuration). In any case: No change reported according to mdadm, everything checks out. mdadm -D /dev/md0 still reports: Version : 1.2 Creation Time : Wed May 23 22:18:45 2012 Raid Level : raid6 Array Size : 3907026848 (3726.03 GiB 4000.80 GB) Used Dev Size : 1953513424 (1863.02 GiB 2000.40 GB) Raid Devices : 4 Total Devices : 4 Persistence : Superblock is persistent Update Time : Mon May 26 12:41:58 2014 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 4K Name : okamilinkun:0 UUID : 0c97ebf3:098864d8:126f44e3:e4337102 Events : 423 Number Major Minor RaidDevice State 0 8 16 0 active sync /dev/sdb 1 8 32 1 active sync /dev/sdc 2 8 48 2 active sync /dev/sdd 3 8 64 3 active sync /dev/sde Trying to mount it still reports: mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so and dmesg: EXT4-fs (md0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 1318081259)! EXT4-fs (md0): group descriptors corrupted! I'm a bit unsure where to proceed from here, and trying stuff "to see if it works" is a bit too risky for me. This is what I suggest I should attempt to do: Tell mdadm that /dev/sdd (the one that windows wrote into) isn't reliable anymore, pretend it is newly re-introduced to the array, and reconstruct its content based on the other three drives. I also could be totally wrong in my assumptions, that the creation of the ntfs partition on /dev/sdd and subsequent deletion has changed something that cannot be fixed this way. My question: Help, what should I do? If I should do what I suggested , how do I do that? From reading documentation, etc, I would think maybe: mdadm --manage /dev/md0 --set-faulty /dev/sdd mdadm --manage /dev/md0 --remove /dev/sdd mdadm --manage /dev/md0 --re-add /dev/sdd However, the documentation examples suggest /dev/sdd1, which seems strange to me, as there is no partition there as far as linux is concerned, just unallocated space. Maybe these commands won't work without. Maybe it makes sense to mirror the partition table of one of the other raid devices that weren't touched, before --re-add. Something like: sfdisk -d /dev/sdb | sfdisk /dev/sdd Bonus question: Why would the Windows 7 installation do something so st...potentially dangerous? Update I went ahead and marked /dev/sdd as faulty, and removed it (not physically) from the array: # mdadm --manage /dev/md0 --set-faulty /dev/sdd # mdadm --manage /dev/md0 --remove /dev/sdd However, attempting to --re-add was disallowed: # mdadm --manage /dev/md0 --re-add /dev/sdd mdadm: --re-add for /dev/sdd to /dev/md0 is not possible --add, was fine. # mdadm --manage /dev/md0 --add /dev/sdd mdadm -D /dev/md0 now reports the state as clean, degraded, recovering, and /dev/sdd as spare rebuilding. /proc/mdstat shows the recovery progress: md0 : active raid6 sdd[4] sdc[1] sde[3] sdb[0] 3907026848 blocks super 1.2 level 6, 4k chunk, algorithm 2 [4/3] [UU_U] [>....................] recovery = 2.1% (42887780/1953513424) finish=348.7min speed=91297K/sec nmon also shows expected output: ¦sdb 0% 87.3 0.0| > |¦ ¦sdc 71% 109.1 0.0|RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR > |¦ ¦sdd 40% 0.0 87.3|WWWWWWWWWWWWWWWWWWWW > |¦ ¦sde 0% 87.3 0.0|> || It looks good so far. Crossing my fingers for another five+ hours :) Update 2 The recovery of /dev/sdd finished, with dmesg output: [44972.599552] md: md0: recovery done. [44972.682811] RAID conf printout: [44972.682815] --- level:6 rd:4 wd:4 [44972.682817] disk 0, o:1, dev:sdb [44972.682819] disk 1, o:1, dev:sdc [44972.682820] disk 2, o:1, dev:sdd [44972.682821] disk 3, o:1, dev:sde Attempting mount /dev/md0 reports: mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so And on dmesg: [44984.159908] EXT4-fs (md0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 1318081259)! [44984.159912] EXT4-fs (md0): group descriptors corrupted! I'm not sure what do do now. Suggestions? Output of dumpe2fs /dev/md0: dumpe2fs 1.42.8 (20-Jun-2013) Filesystem volume name: Atlas Last mounted on: /mnt/atlas Filesystem UUID: e7bfb6a4-c907-4aa0-9b55-9528817bfd70 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: user_xattr acl Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 244195328 Block count: 976756712 Reserved block count: 48837835 Free blocks: 92000180 Free inodes: 243414877 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 791 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 RAID stripe width: 2 Flex block group size: 16 Filesystem created: Thu May 24 07:22:41 2012 Last mount time: Sun May 25 23:44:38 2014 Last write time: Sun May 25 23:46:42 2014 Mount count: 341 Maximum mount count: -1 Last checked: Thu May 24 07:22:41 2012 Check interval: 0 (<none>) Lifetime writes: 4357 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: e177a374-0b90-4eaa-b78f-d734aae13051 Journal backup: inode blocks dumpe2fs: Corrupt extent header while reading journal super block

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  • Ubuntu 12.04 LTS vs Ubuntu 14.04 LTS memory usage

    - by geoffroy
    My droplet has 512 MB memory and is running Ubuntu 12.04 LTS 64 bits and a Rails 4 application + several workers. It's running well. I tried to deploy the same thing on a Ubuntu 14.04 LTS 64 bits droplet and I've got plenty of memory related problem (can't fork). Is Ubuntu 14.04 LTS using way more RAM than Ubuntu 12.04 LTS? Is there something I should know to lower memory usage ? Should I stick with Ubuntu 12.04 LTS?

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  • Turning on Bluetooth disables wifi on Yoga 2

    - by Yostage
    I have a Lenovo Yoga 2. The moment that I turn on bluetooth, the wifi drops out - I lose connection, and connecting again shows "connection failed". If I turn the bluetooth off, wifi can reestablish fine. I've tried lots of different combinations of drivers for both the wifi and the bluetooth, but no combination has has changed this behavior yet. I've read some speculation that the cards have insufficient shielding, but that seems like kind of a large flaw to ship with. I've tried with a Carbon X1, a Yoga 2 Pro, and a Yoga 2 all next to each other on the desk while running InSSIDer. The X1 and the Y2P don't lose wifi connection when the bluetooth turns on, but the Y2 does immediately. The Y2P and the Y2 are running the same drivers for bluetooth and wifi, and appear to have the same wireless card internally. During the failure state, InSSIDer still sees signal strength for my network, but I cannot connect to it. stats: the card that comes in the laptop is an Intel Wireless-N 7260 Intel Bluetooth driver is at 17.0.1401.422 Intel Wireless driver is at 17.0.2.5 Windows 8.1 x64 Home wifi is a Medialink MWN-WAPR150N

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  • Auto backup a user folder to a usb when usb is plugged in

    - by Azztech Computers
    I'm a computer technician and help customers everyday with their computers and smartphones and have a really basic (i think) request but dont know how to go about it. Customer always come in with broken phones, water damage, needing updates, or just want me to backup their information. I currently have a program that i use when i backup their computers it backups their iOS folder C:\Users\USER\AppData\Roaming\Apple Computer\MobileSync\Backup but what i want is a quick easy way to do this in customers houses. What i require is a way when i plug in a USB drive it AUTOMATICALLY searches for the folder and starts transferring the folder to a predefined folder on the USB drive. This was I can just plug it in and begin work on their computer or phone without the risk of losing their information. I'm sure there is a .bat/.ini file i could use but wondering if someone has already done this or something similar as I would need it to search all the USER folders not just the one I'm logged into. Thanks in advance

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