Backup, Recovery, And Saftey Flashcards
Full backup
Backup everything
Incremental backup
Only the files that changed since the last backup
Quick and low storage
Differential backup
Everything that has changed since the last FULL BACKUP
Medium space and time
Synthetic backup
Initial full backup combined with 6 incremental backups to form a new full backup
Faster / can be done offline
Archive attribute
Flags are set on anytime you modify a file so the system knows what’s changed since the last backup
Incremental and full backups reset the flag, differential won’t.
Grandfather father son (GFS)
Example:
7 daily backup (son) reuse each week
5 weekly backups (father)
12 monthly backup (grandfather)
3-2-1 backup rule
3 copy’s of data
2 different media types
1 copy offline and off site
Backup testing
At least once a month
Power surge
Increase in the voltage being provided
(Small increase)
Power spike 4 causes
Large voltage increase:
Short circuit
Tripped breaker
Power outage
Lightning
Power sag
Opposite of a surge
Power brownout
Lights dim and computer may shut off
Blackout
Long term power loss
Uninterruptible power supply (UPS)
Combines surge protector with a backup battery
Backup generators 3 types
Portable gas
Permanently installed
Battery inverter