https://github.com/thrawn01/scrub-snapshot

https://github.com/thrawn01/scrub-snapshot

Last synced: 5 days ago
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• Host: GitHub
• URL: https://github.com/thrawn01/scrub-snapshot
• Owner: thrawn01
• Created: 2013-01-18T21:08:50.000Z (almost 12 years ago)
• Default Branch: master
• Last Pushed: 2013-01-18T21:09:35.000Z (almost 12 years ago)
• Last Synced: 2023-04-11T05:18:28.395Z (over 1 year ago)
• Language: Python
• Size: 141 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

        
# == Test Instructions ==

# If clean up is needed from a previous test

sudo lvremove /dev/volume/original -ff

sudo pvremove /dev/sdb -ff

# ----------

# Write NULL's to the first 100M on the disk

sudo ./write.py /dev/sdb 0 25600

# Create a physical Volume of 100M on /dev/sdb

sudo pvcreate /dev/sdb --setphysicalvolumesize 100M

# Create a Volume Group called 'volume'

sudo vgcreate volume /dev/sdb

# Create a volume called 'original'

sudo lvcreate -L8M -n original volume

# Write 65's char(A) to the entire volume

sudo ./write.py /dev/volume/original 65 2048

# Make a snapshot

sudo lvcreate -L8M -s -n backup /dev/volume/original

# Write 66's char('B') to the first 5 sectors using direct IO

# Avoid using buffered IO, or the data will not show in the cow imediatly

sudo ./write.py /dev/volume/original 66 5

# See what is in the COW (Should be 5 exceptions in the cow)

# -d skips the scrub, and simply counts the exceptions

sudo ./scrub-snapshot.py /dev/volume/backup -d -vv

# Scrub the snapshot

sudo ./scrub-snapshot.py /dev/volume/backup -v