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• How to recover from a drive failure in a RAID 5 configuration?

  - by Philip Fourie

  This morning a drive failed on our database server. The drive array (3 disks) is setup in a RAID 5 configuration. While we wait for a drive replacement we are preparing for a recovery strategy. Users are continuing to work on the system, albeit very slowly (don't know why??). How does one install the new drive - will the data for this drive automatically be rebuilt from the parity or is there another process we should follow? Edit: This is a hardware RAID controller. (Thanks for the answers so far, appreciated)

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• How to remove an "extra" (unwanted) network from a windows 2008 failover cluster?

  - by Trondh

  Hi, We had a severe crash on one node of our 2-node Windows 2008 / Exchange 2007 CCR Cluster the other day, and i tried to rebuild the node from scratch. I'm using this as a rough outline: http://edmckinzie.spaces.live.com/Blog/cns!687C72A5909E4230!508.entry?sa=641979772 The problem: Our cluster was originally setup with only one NIC per host, as this is supposedly supported in Win2008 (no dedicated heartbeat NIC). When I add my freshly installed node to the cluster, it shows up with two cluster networks, "Cluster Network 1" & 2. The existing node's NIC has been placed in one cluster network and my fresh installed has ended up in the other. I can't find anywhere in the GUI to choose which cluster network each physical NIC should be part of, but i KNOW I have done this before. Time is of the essence on this one, so I was hoping someone in here had the answer on the top of their head... Thanks for any pointers. regards, Trond Hindenes

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• Need deleted data back from Pen Drive, Please help

  - by Manav Sharma

  All, I am using a Pendrive to transfer files from one system to another. I think I deleted some files from the Pendrive that I now need back. Also, there are chances that I might have overwritten the memory where the deleted data might have existed. Is there any software to do something about that? I understand that logically whatever is overwritten in memory cannot to fetched back. But still I need to trust the advances in the technology. Any help is appreciated. Thanks

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• switching dns server providers

  - by Yoav Aner

  I'm trying to wrap my head around something that I thought I kinda understood, but clearly there's some piece missing. We're currently using Zerigo as our primary dns, with slave dns running on linode. This works quite well. However, recent DDOS attacks on zerigo meant that whilst dns queries were still resolved, we were unable to make any dns changes. Since we rely on dns changes on our own infrastructure, I'm looking to improve this somehow. I'd rather not ditch zerigo completely, and realise that this or similar problems can happen with ANY primary dns hosting provider. It might not be DDOS, but a bug on their server, or something that means we can no longer issue updates. For this I want to have some fallback option: a completely independent (primary) dns provider (maybe AWS), which we will keep in-sync manually. We will switch-over to it when there's a problem. This brings me to my question: How do I make sure we can switch those providers quickly enough? specifically, on our registrar, there's a list of name servers, but no settings like TTL etc. How do dns clients know to use the newly updated name server records? Is this configured in the SOA? However, the SOA itself is hosted with the dns provider and we might not be able to update it... This is not a question about a one-time move, which can be planned and scheduled and tested, but rather to be able to do so when things are half-broken.

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• How to recover files from a non-booting windows server?

  - by edude05

  I'm having a problem with a windows server 2008 server. After it was demoted from a AD domain controller, it is unable to get to the login screen (it reboots after applying user settings). Is there a way to recover files from this system via something like a windows live CD, or of course fix this issue?

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• A dusty server room

  - by pauska

  Here's the story.. The owners of the building we lease office space from decided to do a renovation of the exterior. This involved in some pretty heavy work at the level where our server room is, including exchanging windows wich are fit inside a concrete wall. My red alert went off when I heard that they were going to do the same thing with our server room (yes, our server room has a window. We're a small shop with 3 racks. The window is secured with steel bars.) I explicity told the contractor that they need to put up a temporarily wall between our racks and the original wall - and to make sure that the temporary wall is 100 % air and water-tight. They promised to do so. The temporary wall has a small door in it, so that workers can go in/out through the day (through our server room, wich was the only option....). On several occasions I could find the small door half-way shut while working evenings/nights. I locked the door, and thought that they would hopefully get the point soon and keep the door shut. I even gave a electrician a mouthful when I saw that he didn't close the door properly. By this point - I bet that most of you get a picture of what happened. Yes, they probably left the door open while drilling in the concrete. I present you our 4 weeks old EMC VNX: I'll even put in a little bonus, here is the APC UPS one rack further away from the temporary wall. See the nice little landing strip from my finger? What should I do? The only thing that comes to mind is to either call all our suppliers (EMC, HP, Dell, Cisco) and get them to send technicians to check out all the gear in the server room, or get some kind of certified 3rd-party consulant to check all of it. Would you run production systems on this gear? How long? Edit: I should also note that our aircondition isn't exactly enterprise-grade, given the nature of our small room. It's just a single inverter, wich have failed one time before I started working here (failed inverters usually leads to water dripping out).

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• How likely can my data be recovered after Windows CHKDSK performed on a degraded RAID 5 array?

  - by chrisling106

  Hello there, We have a RAID 5 setup with 3 SATA disks, #2 went down as reported on the pre-POST screen. Unfortunately, for some reason out of my control, the system was rebooted with a degraded RAID :-O Windows XP (64-bit) loaded, CHKDSK ran automatically and done its recovery! From that point onwards, the following error prompts every time even in Safe Mode: lsass.exe - The endpoint format is invalid I took those 3 disks to the data recovery expert and need to wait at least 2-4 days for results. There are 2 VMs on multiple files stored in this RAID 5 array, and there's no backup! Sorry, I just inherited the system from an ex-staff who has left the company 2 months before I joined. How likely the data can be recovered?

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• iSCSI RAID1 on two servers, fail scenario

  - by Franz Kafka

  Hallo, a simple question: Image I have two servers, each server has two disks in RAID1. Now I merge the two arrays with iSCSI to one RAID1 disk. Two questions: Can I do the merging of the 4 disks in one go? I can't image how. First I will have to install the os, and then the raid controller is already set up to RAID1. If a whole server fails the other server would continue working without any problems? Does iSCSI notice that the other server is missing and treet this as if the two disks were broken? When the server comes back online the data is resynced, as if I installed new disks into a array? Can I image that this way? Thanks alot.

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• Migrate Windows Server 2008 to a new hard disk

  - by MainMa

  Hi, I have a machine with Windows Server 2008. I want to change the hard disk drive, but keep everything else. I don't have a cd/dvd drive and don't want to buy it. My first idea was to make a byte-to-byte copy of the disk with Paragon Advanced Recovery. The problem is that when I try to boot from a new hard disk, it says that there were hardware changes and that Windows must be repaired, inviting me to insert the installation disk and follow repair instructions. I searched and found that 1:1 copy is not a correct way to do things. The correct one is to restore Windows to a new hard disk from a full system backup. But to restore, I need to have a dvd drive. I tried to make a copy of the Windows Server 2008 .iso on an USB flash drive, but the drive is not bootable (while the same procedure applied to Paragon Advanced Recovery ISO produces a bootable recovery USB flash drive). Now what else can I do (except buying a dvd drive)? Is there a way either to make Windows work without doing recovery or recover Windows 2008 without using a cd drive?

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• Is there any way to recover a 2003 Exchange database without the domain controller?

  - by Jon

  I have access to the Exchange Server but the domain controller RAID card died and the restored backup causes the new server to reboot without even a blue screen. I have rebuilt a new domain controller and another Exchange server. What is the best way to migrate the data to the new Exchange Store from the old Exchange Server?

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• Exchange 2007 - Mailbox Database Recovery

  - by Phrontiste

  Exchange 2007 edb Can we restore Exchange edb (First storage group\mailbox database.edb) to another exchange server ? Do I just copy the edb to the new exchange server and delete the first storage group\mailbox database.edb and replace it with this one ? How can I get all the mailboxes from that (old) mailbox database.edb ? I had a exchange 2007 server with 10 mailboxes, I have installed exchange on another machine and was thinking if I can do the above ? or is there any way I can get all the mailboxes from that edb (old mailbox database) and import them into the new one. I have deleted the old exchange install I had (these are test machines) What are the steps required to get the DB working on the new machine ? Also, I am confused about the recovery storage group ? I can mount a mailbox database in recovery storage group, but when I try to get mailbox out of it, it won't match any thing ? can someone please assist in understanding RSG and how to restore the OLD mailbox database. thanks and regards Phrontiste

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• Is it possible to configure TMG to impersonate a domain user for anonymous requests to a website?

  - by Daniel Root

  I would like to configure Forefront Threat Management Gateway (formerly ISA server) to impersonate a specific domain user for any anonymous request to a particular listener. For example, for any anonymous request to http://www.mycompany.com, I would like to serve up http://myinternal as though MYDOMAIN/GuestAccount were accessing the site. Is this even possible in ISA/TMG? If so, where do I go to configure this?

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• General High-Level Assessment

  - by tcarper

  Guys and Gals, I've been tasked with a doozy of an assignment. The objective is something akin to "laying of hands" on several database servers which work in concert to provide data to various Web, Client-Server and Tablet-Sync'd distributed Client-Server programs. More specifically, I've been asked to come up with a "Maintenance Plan" which includes recommendations for future work to improve these machines' performance/reliability/security/etc. Might there be some good articles on teh interwebs ya'll could point me towards which would give me some good basis to start? Articles describing "These are the top 4 overarching categories and this is how you should proceed when drilling down on each of them" sort-of-thing would be fabulous. The Databases are all SQL 2005, however the compatibility level is 80 and they were originally created with ERwin based on SQL 6.5. The OSs are all Windows Server 2003. Thanks all! Tim

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• Looking for suggestions for hosting Windows 2000 Server in the cloud / VPS / etc?

  - by JohnyD

  I have a Windows 2000 Server, currently virtualized in Hyper-V, that I would like to get running off-site as a backup (cloud, VPS, etc). You can't virtualize in EC2 and I'm fairly certain there are no Server 2000 AMI's floating about (correct me if I'm wrong!). If anyone has a recommendation on how I can get a virtualized Windows 2000 Server running in a secure, remote environment I would be grateful. As far as locations go I'd be interested in both North America as well as Australia and Europe. In a nutshell, we're ploughing our way out of a legacy codebase and this server is the last that remains of the legacy apps. However, it is still very much used by our clients. Everything is backed up each night (data, images, etc) to tape which is then taken offsite. However, in the event of a fire I would love to have a backup legacy server to point DNS records to. So while I am rebuilding from the ashes our services would already be available. It would save a lot of time and make my managers all the more happy (and that's what it's all about, riighhtt? :D) Thank you all for your suggestions. Please let me know if I've left out any important information. Additional info: - the legacy codebase does not function properly in Server 2003

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• Error when mount the database in exchange 2010 SP1

  - by user64060

  Hi, My company have two exchange 2010 SP1 servers with DAG configuration with OS widows server 2008 R2 in testing entironment. Today i want to test my backup possibility, so i restore the backup data to another location not original location. I dismount the database and then delete the all files under the database location. last I copy back the files from back up location to database location. When i want to mount the database. It will come out the below error! -------------------------------------------------------- Microsoft Exchange Error -------------------------------------------------------- Failed to mount database 'mail2'. mail2FailedError: Couldn't mount the database that you specified. Specified database: mail2; Error code: An Active Manager operation failed. Error: The database action failed. Error: Operation failed with message: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=1011) [Database: mail2, Server: mail2.e0594.cn]. An Active Manager operation failed. Error: The database action failed. Error: Operation failed with message: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=1011) [Database: mail2, Server: mail2.e0594.cn] An Active Manager operation failed. Error: Operation failed with message: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=1011) [Server: mail2.e0594.cn] MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=1011) Any suggestion? Thanks!

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• How do I cancel windows server 2003 repair install?

  - by Kilgore2k

  System: Windows 2003 Server Enterprise Scenario: NTDS db is corrupt and all attempts to fix with esentutl fail. Ran chkdsk which seemed to repair disk error and give access to the ntds.dit file but still esentutl fails. (Attached the drive to a different server to run the esentutl) Error: Access to source database '[path to copy of]/ntds.dit' failed with Jet error -1022. Operation terminated with error -1022 (JET_errDiskIO, Disk IO error) after 0.170 seconds. This error occurs on any disk I cpoy the files to including original location in C:\WINDOWS\NTDS\ Now enter the "Stupid!" and "what was I thinking!?" part (must be the late hour...) Stupid: No updated backup - after using a backup I get a network password error in the lsass error. what was I thinking!?: Started the install repair from the original CD but the install fails since the AD fails to start. Now I cant boot into any mode (safe mode, AD restore etc) nor complete the repair install. I would really like to avoid a fresh install since I have the Exchange server on this DC and would rather migrate to a new server than have to start from scratch. Thanks!

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• Trouble "turning off" dialtone in Exchange 2010

  - by makerofthings7

  Given that there are two ways to enable dial tone, I'm having trouble turing it off. The two ways I'm aware of are: Dismount the database, delete it or rename it, mount it, Exchange will prompt for a dial tone creation. Run the command: Get-Mailbox -Database DB1 | Set-Mailbox -Database DTDB1 as described here Both options should result in Outlook "thinking" it's in dial tone mode. Since my goal is to shut off dial tone, I think I need to learn the specific, technical parameters that "tell" Outlook that it is in dial tone mode. Question How can I turn off dial tone for a given database? What tells outlook that it's in dial tone mode?

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• Hard Disk based storage library

  - by Ryan M.

  We have a Tandberg T24 tape device to handle all of our long term backups right now. We decided that we're not backing up nearly everything that we would like to and that we still have a lot of vulnerabilities. To get to where we want to be, we're going to have to back up a lot more servers than we're currently doing. All of our internal servers have some sort of directly attached drive (I.e. LaCie Raid box or a simple portable hard drive) doing backups, but what we want to do is get those backups off-site. The current tape drive is directly attached via SCSI to a Windows Server 2008 File Server. So to back up anything to tape, it has to be funneled through the File Server. With the current increase that we have planned, I don't think that funneling everything through the File Server is the right course of action and I'm thinking that maybe a second backup device would be more appropriate. I would like your input on a couple of ideas. 1) Doing HDD instead of tape. Tape is hard to deal with. We have a regular rotation cycle, so they don't need years and years of shelf life, so I'm wondering if something HDD-based would be better. 2) Something accessible over the network. Instead of having the device directly attached to one specific machine, have it available to all the servers over the network. Our File Server is a 12-disk raid 6 set up.. I was thinking something like that, but with no raid involved, all disks are stand alone so they can be used/installed/removed on an individual basis. Does any such thing exist? Thanks for your ideas. I'm really interested to hear about some of the solutions you guys are using..

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• How best to handle end user notification in the event of system failure incl. email?

  - by BrianLy

  I've been asked to research ways of handling end user notifications when systems such as email are experiencing problems. Perhaps an example will make this a little clearer. We have a number of sites in different countries. Recently email was impacted at one of the sites, but it could have been a complete network outage. Information was provided by phone to local IT managers at the site but onward communication was slower than some would have liked. It seems like almost everyone at the site has a personal mobile phone which could receive text messages, and perhaps access a remote website with postings on the situation. However managing and supporting a system to text people on these relatively infrequent occasions would be very costly to do internally. What are other people doing to handle situations like this? Some things I've thought of include: Database of phone numbers to text. Seems costly and not very easy to maintain for an already stretched IT group. Is there an external service that would let you do this policies? Send voicemail message to all phones on site. Maintain an external website. This would not work in all situations (network failure), and there is a limit on the amount of info that can be posted externally. A site outage could be sensitive information in some situations. How could the site be password protected? Maybe OpenId/Facebook connect would work. Use a site like Yammer.com which is publicly accessible but only by people with a company email address. Anyone using this for IT outage notifications? To me it looks like there is no clear answer, and that there are solutions for some subsets of users. To be comprehensive a number of solutions would need to be combined. Any additional thoughts or recommendations? What worked or didn't work for your organization?

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• How to start MSSQL Server with corrupt model db

  - by Jordan McGuigan

  After moving some databases around (restoring, deleting, etc) we experienced an issue creating new databases. Specifically, When trying to create a new database MSSQL Server it failed because the "The database 'model' is marked RESTORING and is in a state that does not allow recovery to be run". As some online solutions suggested, we tried to Start and Stop the MSSQL Service. Service would not restart because "Could not create tempdb. You may not have enough disk space available. Free additional disk space by deleting other files on the tempdb drive" (FYI: the drive has 100gb of free space). Tried restarting the machine the MSSQL Server is running on. When the server came back online, we received the same error. We have tried deleting tempdb.mdf and restoring the modeldb from the templates folder, but neither of these solved the issue. We are unable to connect to the database, even in single user mode. Many of the online solutions have us running SQL commands against the server, but we are unable to connect (even in single user mode) to the DB to run commands against the server. Specific error messages: Database 'model' cannot be opened. It is in the middle of a restore. (Microsoft SQL Server, Error: 927) The SQL Server (MSSQLSERVER) service is starting. The SQL Server (MSSQLSERVER) service could not be started. A service specific error occurred: 1814. We need the server up and running again ASAP.

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• Uptime concerns in case of AWS outage

  - by Aditya Patawari

  I am running an Elastic Load Balancer backup by 2 instances in different Availability Zones in US East. I am using Multi-AZ RDS as well. Ideally this should ensure that if one AZ goes down, it should not effect the app because everything is spread across multiple AZs. But the recent AWS outage took the app down for a long time. I am not sure how this can happen. It would be great if someone can point out what went wrong. Major question here I have is how can I avoid this in future? I can setup app servers across different regions or even providers and use DNS for load balancing but what do I do with MySQL? Read Replicas will introduce some lag which I would want to avoid.

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• LVM vs RAID0 vs RAID "linear" - Combine 2 disks as one, data recovery?

  - by leto

  Hi there, given two 2TB USB external disks that have to be combined to one 4TB volume and formatted with one big Filesystem (XFS), I have a small question to ask. Does LVM provide better Data recovery, should one disk be unplugged/damaged by being able to recover the data of the still working disk or is everything lost? I would appreciate a solution where only the data of one disk is lost and I can recover the content of the other with the usual filesystem/lvm/raid tools. Is that possible with LVM or RAID "linear"? This is for storing unimportant files that can be retrieved from backup, but I want to save time :) Thank you in advance

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• How can I tell if my hard drive(s) have Battery Backed Write Cache?

  - by Riedsio

  How can I tell if my hard drives have a battery backed write cache (BBWC)? How can I tell if it is enabled and/or configured correctly? I don't have physical access to my server. It's a GNU/Linux box. I can provide supplemental incremental information/details as requested. My frame of reference is that of a DBA -- I have access and privileges, but (usually) only tread where I know am supposed to. :)

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• How do I force an exchange database to become "active"?

  - by makerofthings7

  We had a catastrophic failure where all that remains is a single edb file. No backups. No log files. The database that remains is on the "passive" copy. The "active" copy is missing, but the server is active. The Exchange console reports that the edb file needs to be reseeded, however there is no source to reseed from. How do I make the "invalid" database file (missing logs) valid? How do I make exchange recognize this as a valid database to use as a primary?

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• Oracle 10g Failover Database - How to fail back?

  - by rrkwells

  I want to know how the failover database concept works after recovery. We have defined our application to connect to a backup database in case the production database fails. If this happens, then all the transactions will be happening on that backup database. Once the production db server is running again, then how do we make sure the changes made in the backup database will be reflected on the production database? We want to make sure that any changes made while failed over are not lost. We are using Oracle 10g.

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