Week 5 - Data Recovery - Intro to System
Admin and IT Infrastructure Services
data recovery ✔✔Retrieving files that were deleted accidentally or purposefully.
When an unexpected event occurs, your main objective is to
...
Week 5 - Data Recovery - Intro to System
Admin and IT Infrastructure Services
data recovery ✔✔Retrieving files that were deleted accidentally or purposefully.
When an unexpected event occurs, your main objective is to __________________________ as
soon as possible, while minimizing the disruption to your business functions. ✔✔resume normal
operations
A _____________________________ is a way for you to document any problems you discovered
along the way, and most importantly, the ways you fixed them so you can make sure they don't
happen again. ✔✔post-mortem
The standard medium for archival backup data storage is
______________________________________. These use spools of magnetic tape, a cheap
storage option usually used for long-term archival purposes, where delays in getting the data isn't
a concern. ✔✔data tapes
rsync ✔✔Remote file and directory synchronization;
commonly used as a backup utility because it supports compression and you can use SSH to
securely transfer data over a network
Mac OS uses a backup utility is called ___________________________. It operates the using an
incremental backup model. ✔✔Time Machine
Microsoft uses _____________________________ which includes two modes of operation: 1)
file-based backups - complete or incremental - to a zip archive and 2) the system image where the
entire disk is saved block by block to a file, only backing up blocks that have changed since the
last backup. ✔✔Backup and Restore
Disaster Recovery Testing ✔✔Annual scenarios that can be anything from a simulated natural
disaster, like an earthquake to a fictional event like a horde of zombies shutting down an office.
Differential backup ✔✔A backup that contains copies of the files that have changed since the last
full system backup.
While a differential backup backs up files that have been changed or created since the last full
backup, an ________________________________ is when only the data that's changed in files
since the last incremental backup is backed up. ✔✔incremental backup
___________________________________________________ is a method of taking multiple
physical disks and combining them into one large virtual disk. ✔✔Redundant Array of
Independent Disks (RAID)
Storing data on a _______________________ doesn't protect against accidentally deleting files,
or malware corrupting your data. ✔✔RAID array
RAID is not a replacement for _______________________. ✔✔backups
A ____________________________________ is a collection of documented procedures and
plans on how to react and handle an emergency or disaster scenario, from the operational
perspective, including things that should be done before,
during and after a disaster. ✔✔disaster recovery plan
___________________ measures cover any procedures or systems in place that will proactively
minimize the impact of a disaster. ✔✔Preventative
_________________ measures are meant to alert you and your team that a disaster has occurred
that can impact operations. ✔✔Detection
Environment Concerns For Disaster Events ✔✔1) Flood Sensors
2) Temperature and Humidity Sensors
3) Smoke Detectors and Fire Alarms
4) Evacuation of Employees (temp work locations if necessary)
Corrective or _______________ measures are those enacted after a disaster has occurred,
including steps like restoring lost data from backups or rebuilding and reconfiguring systems that
were damaged. ✔✔recovery
When one system in a redundant pair suffers a failure,
it's called a ___________________ of failure because it only takes one more failure to completely
take the system down. ✔✔single point
A ______________________ allows you to prioritize certain aspects of
an organization that is more at risk during an unforeseen event. It can involve brainstorming and
analyzing the impact of damaging events. ✔✔risk assessment
We create a _________________________ after an incident, an outage,
or some event when something goes wrong, or at the end of a project to analyze how it went,
including things that went well and things that didn't. ✔✔post-mortem
What sections are includded in writing a post-mortem? ✔✔1) Brief Summary - w/dates, times,
timezones
- What the incident was
- How long it was
- What the impact was
- How it was fixed
2) Detailed Timeline - w/dates, times, timezones
3) Root Cause - What can be learned?
4) Resolution and Recovery Efforts
- more detail about what steps were taken to recover, the rationale and the reasoning behind those
actions, and the outcome of each step
5) Actions to Avoid the Same Scenario
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