Disaster recovery and preparedness is an unfortunate aspect of systems administration. This tag should be used for help with planning, implementation and best-practices related to recovering from a catastrophic event on a server or in a datacenter environment.

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“Roll back process” for servers during different penetration testing in case of something goes wrong?

In some extent, different kind of vulnerability assessment and penetration testing may impact on target system. I am looking for the solution/rollback process for server if something goes wrong during ...
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2answers
1k views

Accessing data on SAS drives if server fails

If my server goes down, how can i access the data on the SAS drives? I don't have another server to plug them into, and even then connecting the drive to a different controller (while keeping the ...
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1answer
1k views

How to get Mondorescue to work with LVM2 (CentOS 6.4)

I'm trying to make an emergency recovery disk with Mondorescue to: Restore my server in case of hardware (or severe software) failure. Make an "identical" server setup for debugging and staging. ...
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1answer
2k views

Recover mdadm RAID 10 array: listing all as spares

I'm a bad person and haven't backed up my RAID elsewhere. I now have a RAID10 array that won't assemble, and I'm hopeful I can save it. Here's the details: I have five hard drives set up as RAID10 ...
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1answer
4k views

How do I get an SQL Database in “Mirrored, Disconnected / In Recovery” into service?

I have an SQL Server 2005 mirrored database, with just the primary and secondary servers, no witness. Tonight the primary has gone down and will not be back on-line for some time yet. The secondary ...
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4answers
524 views

How can I create a “fail whale” for my website?

I have a website that we load-balance across a few machines. The load-balancer (a Brocade ServerIron ADX) is on the local network. I know it has the capability to configure a "backup" ip address to ...
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3answers
89 views

How do you securely shred a file from a RAID 6?

I'm looking for a way to delete a file from a RAID 6 implementation in a secure fashion (shredding). Do I need to delete the file from the RAID, disassemble the RAID, wipe the free space of each ...
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0answers
18 views

how to recover files found automatically by my Debian Jessie

I powered off my Debian Jessie forcibly, it has gone through a fsck during boot and created RECOVERED_FILES directory in my home containing a file system with a similar layout as the root. Some files ...
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9answers
28k views

Unmount a nfs mount where the nfs server has disappeared

Server A used to be a NFS server. Server B was mounting an export of that. Everything was fine. Then A died. Just switched off. Gone. Vanished. However that folder is still mounted on B. I obviously ...
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0answers
26 views

failover from Oracle VM to Azure

Can I do a failover from Oracle OVM to Azure and then fallback to Oracle VM i.e. to Oracle Hypervisor environment? Does Azure support this at this point of time?
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0answers
37 views

Starting MySQL/TokuDB with missing recovery log

I've lost TokuDB recovery log(HDD has died) and TokuDB won't even start complaining about missing recovery log: /var/log/mysql/error.log: ... [ERROR] TokuDB: Recovery log is missing (persistent ...
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2answers
22 views

Single Domain Controller FSMO holder DR

We are looking at the topic of DR at the moment and I would like your expert help in the creation of a DR plan in the event that our PDC somehow goes kaput! Info: Our PDC holds all FSMO roles We have ...
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0answers
17 views

Small Business Essentials 2011 restore from backup

I have a SBS Essentials 2011 Premium Edition that has experienced a hdd failure. No original install disks to be had and no emergency boot disk. There is, however an external backup drive that ...
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0answers
10 views

Server can't boot, showing main process (206) terminated with status 127

The system is Debian 7.0. Booting in recovery mode fails with messages shown in this screenprint: How can I solve this issue?
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2answers
231 views

Allowed production maintenance during business hours [closed]

I recently came into managing a small startup. As most small startups, I would think, we have been doing what we wanted in production virtually when we thought it was okay. People are careful and ...
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2answers
21 views

Disaster Recovery for VMWare ESX

We need to formulate a plan for disaster recovery a VMWare installation. The components are two ESX hosts and a NAS unit. We're wondering what everyone here uses for their farm? We have a few ideas ...
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0answers
51 views

2TB NTFS Partition Works in linux, Causes windows to hang

I have a ESXi server containing a large virtual disk (1.8TB) on RAID 0, and the server suffered from a power outage. The drive was a storage drive for a Windows Server 2012 R2 file server, which is ...
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1answer
61 views

Azure regional pairing for G series VMs

Currently G series VMs are only supported by US East 2 and US West Azure regions - both of which are not DR pairs. How can Disaster Recovery for G series VMs in the US, be handled?
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2answers
161 views

Azure-to-Azure Disaster Recovery orchestration

I have been looking into this lately to find no available solution for Azure-to-Azure disaster recovery solution that is native. Do you people think that it is completely fair to trust the Azure cloud ...
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2answers
65 views

Azure VM DR solution [closed]

I am having some doubts on how to implement and guarantee Azure Virtual machine Disaster recovery. I have a virtual machine running some IIS on one Azure region1 (suppose Central US). In order to ...
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2answers
4k views

Hadoop HDFS Backup & DR Strategy

We are preparing to implement our first Hadoop cluster. As such we are starting out small with a four node setup. (1 master node, and 3 worker nodes) Each node will have 6TB of storage. (6 x 1TB ...
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3answers
654 views

Replicating databases using Dell equallogic

Can the Dell Equallogic 6100/4100 replicate databases like mysql, MS SQL 2012, and Oracle 11g? I would like to set up my web applications and their databases in VMWare 5. They would run off the ...
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1answer
521 views

Windows Server 2008 R2 - Keyboard isn't recognized on login screen, but mouse does

Problem Backgroud: Our company has an IBM System X3200 M3 server running Windows Server 2008 R2 Enterprise with two WS Caviar Black 1TB HD in RAID 1. Recently we had a power failure that corrupted ...
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1answer
308 views

Replay/Truncate log files exchange 2010 without having ever made a backup

I have an exchange 2010 server where the domain controller/DNS has crashed and is beyond recovery (No backup, dont ask). The Exchange server is still alive, but management and such cant load. I have ...
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1answer
26 views

DR Site removed including 3rd DC before it was demoted

I'm planning a migration from SBS2008 to 2012 Essentials, and Exchange 2007 to Online-Exchange. I have inherited a network structure like this, made up of 2 sites: DataRec Site - DC02 ...
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2answers
2k views

Exchange 2007 - Mailbox Database Recovery

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 ...
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3answers
1k views

Good backup solution for Xen virtual machines? [closed]

we are looking for a backup solution for our xen servers that meets the following requirements: makes backups while machines are running has easy to use disaster recovery without depending on ...
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0answers
46 views

using testdisk to restore old superblock, cryptowall3.0 restoration

I have a drive that was infected with cryptowall3.0 Documentation states that the file is deleted and then from memory a new file is encrypted and that memory file is rename. Hypothetically restoring ...
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1answer
36 views

Is a Wildcard cert better for Exchange DR than a SAN cert?

I'm reading this blog article about the logic of Autodiscover, and I hope I'm misreading it. The problem I have is that it appears that the Autodiscover process will inspect the SUBJECT of a ...
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1answer
634 views

Bring back to restoring state an online database

I configured logshinging for a database. I did some tests and tried a controlled failover. During log shipping secondary db is in restoring state. To have a controlled failover i stopped the primary ...
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0answers
8 views

Disk boot up from backup

I have a backup of my whole / partition except for /tmp /proc and /sys . Is there a way to boot this up into live? Backup is on 32 bit debian 5 OS Thanks
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2answers
748 views

How to recover data from an Exchange 2013 database after a complete Active Directory loss?

Scenario: a single Exchange 2013 server in a Windows Server 2003 AD domain; one DC malfunctioned months ago and was dismissed (without proper demotion, no less); the other DC died yesterday and there ...
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2answers
151 views

How to recover an Ubuntu Server which has partial permanent data loss?

I have an Ubuntu Server which root partition is on a raid 0 were one HDD had data loss / broken sectors. The data loss only impacts 1-2 % of the total data on that root partition however the server ...
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1answer
108 views

How much memory is required to send deduplicated ZFS stream?

Last year I set up a pair of servers for my employer, running FreeBSD 10.1 with a large pool of storage in each server. 12 x 2TB disks, in a zpool configured as two raidz2 vdevs of six disks each. One ...
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1answer
933 views

Method for offsite backup of EC2 servers?

We run a dozen or so Ubuntu Linux webserver production instances on Amazon VPC. The instances are bootstrapped and managed via Puppet. Most management is done via the AWS Console. Our AWS credentials ...
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2answers
4k views

RAID 5 RECONSTRUCT with RAID Reconstructor

I have Dell Poweredge server 2600 with Raid 5 in 3 hard drive Scsi 36gb each, it was fail to boot sinc the third drive is offline. I attached Sata card adapter to Sata hard drive and install OS ...
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0answers
83 views

Data recovery seems impossible after kernel upgrade. MDADM (Raid1) LVM2

I opened a question about rebuilding a bad partition My Problem that din't take me anywhere. Bad news is the company trying to rescue the data says it's finding huge inconsistencies they can see some ...
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1answer
83 views

Restore of SBS 2008 unsuccessful

I have a Windows SBS 2008 here that I'm trying to restore from backups. It runs as a VMware virtual machine, so I can use snapshots and try out stuff. What happened Windows froze and the only option ...
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3answers
215 views

Need a recipe following a hack disaster [duplicate]

I have inherited a Linux Apache CentOS plesk server which has been hacked, which has websites which are in production. I have been advised by my friend to rebuild it from scratch, since the attack ...
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1answer
1k views

Can't rebuild master DB on MS SQL Server 2005 Express after power failure

There has been a power loss on our server and I cannot start the SQL service because the master DB is corrupted (as the log states). I found many articles recommending running the setup.exe with ...
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5answers
6k views

Disk failed part way through 3ware RAID 5 rebuild

I have a 3ware 9650SE RAID controller with a RAID 5 array containing 15 Seagate ST31000340NS disks. After noticing ECC errors in the Port 10 drive I replaced it with a spare and began a RAID rebuild. ...
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5answers
2k views

Server Potentially Compromised — c99madshell [duplicate]

So, low and behold, a legacy site we've been hosting for a client had a version of FCKEditor that allowed someone to upload the dreaded c99madshell exploit onto our web host. I'm not a big security ...
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2answers
1k views

Rebuilding RAID1 in Ubuntu

I had my second HD in my RAID1 come up with bad sectors. So I got another drive and pulled out the bad sector drive and put the new drive in. With the original working RAID1 drive in the computer it ...
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3answers
256 views

Rebuild or repair? [duplicate]

Possible Duplicate: Updating Malware cleaning skills I was having an argument the other day regarding damaged systems. If a system has a hard to eradicate virus, etc, or has been damaged ...
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1answer
904 views

Recovery strategy for Master-Master replication

I have implemented a HA solution for mysql based on master-master replication. There is a mechanism on the front end part which guarantees that only one db will be read/written to at a given time ...
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4answers
4k views

How do I backup my TRAC installations?

We use separate TRAC instances as our ticket system for many projects and need to have them moved off site several times a day for disaster recovery. What is the best way to make this happen? Is ...
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1answer
396 views

Disaster recovery. MDADM/LVM2 Some advance but stuck on final mount

We made a stupid upgrade on a running server using wrong repositories and the system became totally unbootable. The system, a SLES 11 we used a openSuse repository to upgrade, and everything went ...
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4answers
11k views

How long does it take to rebuild a drive in a RAID 6?

I'm building a 7-disk RAID 6 array on a DELL MD3000 DAS box. My top priority is storage space, so I'd like to use 2TB drives -- but I'm worried about how long it will take to rebuild a failed disk. ...
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213 views

Single node SQL Server 2014 cluster at DR environment

We are setting up a new Disaster Recovery environment. On Production we have SQL Server cluster with two nodes. For DR we decided that one node should be enough. The plan is to add the second node ...
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5answers
23k views

Edit Hard Disk Serial Number with VMware

I'm virtualizing a Rockwell AssetCentre Server and I'm looking at Disaster Recovery scenarios. This server contains a lot of other Rockwell Software like RSLinx, Logix 5000, Logix 500, and more... ...