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six demon bag

Wind, fire, all that kind of thing!

2017-04-01

Reset VSS Writers

VSS writers are application-specific components for Microsoft's Volume Shadow Copy Service, which ensure the consistency of application data when a shadow copy is created. That's quite useful for creating consistent backups of a system. However, some of these writers go into error states more or less frequently. And Microsoft did not deem it necessary to document how to reset writers without rebooting the entire system (or at least I didn't manage to find that piece of information).

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Posted 20:41 [permalink]

2015-06-14

Querying DB2 Backups in TSM Fails with Return Code 106

On one of my servers a query for DB2 backups in TSM (db2adutl query full db DBNAME) failed with the following error:

Error: Initialize environment failed with TSM return code 106

As per dsmrc.h return code 106 indicates a permission problem:

#define DSM_RC_ACCESS_DENIED       106 /* denied due to improper permission */

which was weird, since the user in question is a member of the DB2ADMNS group that is supposed to have all required permissions.

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Posted 23:40 [permalink]

2015-02-22

NTP "Leap not in sync"

Today I had a rather curious problem on my fileserver. I noticed that its system time was behind the clock, but when I tried to manually synchronize it with my timeserver, ntpdate failed with the error message "Leap not in sync".

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Posted 21:40 [permalink]

2015-01-05

PowerShell Execution Policy Scopes

Sometimes when you try to change the PowerShell execution policy you'll get an error message that the setting was applied, but will be overridden by a setting in another scope:

Set-ExecutionPolicy : Windows PowerShell updated your execution policy successfully, but the setting is overridden by a policy defined at a more specific scope. Due to the override, your shell will retain its current effective execution policy of XXX. …

Execution policies can be defined in five different scopes, from LocalMachine (least specific) to MachinePolicy (most specific), where settings in more specific scopes take precedence over settings in less specific scopes. Use Get-ExecutionPolicy -List to see which scope has which setting.

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Posted 22:46 [permalink]

2012-11-17

Importing VMs From external Hyper-V Hosts

I've been working on a project where I needed to migrate (clone actually, in order to maintain a fallback scenario) virtual machines from external (standalone) Hyper-V hosts to a Hyper-V cluster. The external hypervisors were not members of the same domain as the cluster nodes. The networks were separated by a firewall. A trust relationship between the domains was not desired.

System Center Virtual Machine Manager 2012 (SCVMM) supports this scenario, but there are several steps that must be performed to prepare for the migration.

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Posted 20:03 [permalink]