Reader Question: Carbon Copy Cloner and File Integrity
IntegrityChecker (simple GUI plus command line tool) is a must-have utility for data integrity that is part of diglloydTools.
Andrew Bwrites:
Out of curiosity, do have you ever run into IntegrityChecker discrepancies when using Carbon Copy Cloner to create backups?
MPG: No issues with Carbon Copy Cloner, as seen below in verifying 5.2TB of data just today.
diglloydMP:MPG lloyd$ ic verify Archive IntegrityChecker(tm) v1.2.3 64-bit, diglloydTools 2.2.14, 2016-03-28 13:13 Copyright 2006-2016 DIGLLOYD INC. All Rights Reserved Use of this software requires a license. See https://macperformanceguide.com/Software-License.html OS X 10.11.6, 16 CPU cores, 65536MiB memory 2016-07-19 at 15:38:59072 Using threads = 6, read buffer size = 4096K, num buffers = 36 Looking for files in "/Volumes/Archive"... 1000...2000... ... 229000...230000...231000...232000...Seconds to scan files: 4.54 232953 files found in 4.54 seconds. Scanning 14521 folders for .ic files...100...200... ... 14400...14500...14521 hash-data files read in 97.67 seconds. Selecting files for hashing... Preparing to hash 218277 files... Files prepared, hashing 218277 files... 0%: 19 files @ 722.0MiB/sec, processed 761.7 MiB 0%: 39 files @ 750.6MiB/sec, processed 1.52 GiB 0%: 57 files @ 755.3MiB/sec, processed 2.28 GiB 0%: 76 files @ 761.7MiB/sec, processed 3.05 GiB 0%: 97 files @ 754.3MiB/sec, processed 3.79 GiB ... 100%: 218233 files @ 697.9MiB/sec, processed 5.03 TiB 100%: 218258 files @ 697.9MiB/sec, processed 5.03 TiB 100%: 218267 files @ 697.9MiB/sec, processed 5.03 TiB Finished reading 218277 files of 218277 100%: 218277 files @ 697.9MiB/sec, processed 5.04 TiB 100%: 218277 files @ 697.8MiB/sec, processed 5.04 TiB Processed 5.04 TiB in 7567.1 seconds @ 697.8MB/sec =================================================== ic verify Archive 2016-07-19 at 17:46:51947 =================================================== # Files with stored hash: 218277 # Files missing: 0 # Files hashed: 218275 # Files without hashes: 0 # Files whose size has changed: 0 # Files whose date changed: 0 # Empty files: 2 ================ /Volumes/Archive/2016-0606-TripPhotos/LeicaSL/2016-0606-LeicaSL-WhiteMountains/LeicaSL-vs-M240-35mm-GraffitiInterior/LeicaSL/: LeicaSLA.textClipping /Volumes/Archive/2016-0606-TripPhotos/LeicaSL/2016-0608-LeicaSL-WhiteMountains/LeicaSL24_90-aseries-45mm-BristleconeLogOnHillside/: D1000334-CORRUPT.DNG # Files whose content changed (same size): 0 # Suspicious files: 0