7 minutes for a 1 GB Incremental?


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dbminter
dbminter
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Got some unusual results on an Incremental I just now took.  It was from a USB 3 HDD source to a different partition on the same USB HDD.  Normally, such an Incremental would never take this long.  But, I had a 1.1 GB/s during the Incremental so it doesn't look like it should have taken this long.


Imaging Summary
--------------------------------------------------------------------------------
Auto Verify: Y
Maximum File Size: 4.00 GB
Compression: High
Password: Y
AES Encryption: None
Intelligent Copy: Y
Power Saving: N
Email On Success: N
Email On Warning: N
Email On Failure: N
Total Selected: 390.47 GB
Current Time: 01/04/2021 7:28:52 PM
--------------------------------------------------------------------------------
Destination:
Backup Type: Incremental
File Name: Append to recent image in directory
--------------------------------------------------------------------------------
Operation 1 of 1
Hard Disk: 3
Drive Letter: I
File System: NTFS
CBT: Y
Size: 500.02 GB
Free: 109.55 GB
Used: 390.47 GB
--------------------------------------------------------------------------------
Starting Image - Monday, January 04, 2021 19:29:01
Initializing
Write Method: Using Direct Disk I/O
Destination Drive: - Free Space 1.65 TB
Creating Volume Snapshot - Please Wait
Volume Snapshots Created
Analyzing file system on volume I:
--------------------------------------------------------------------------------
Saving Partition -
Reading File System Bitmap
CBT Init Using MFT - Volume reset - 01/01/2021 5:26 PM, Image reset - 11/26/2020 12:19 PM
Looking for changes
Saving Partition
--------------------------------------------------------------------------------
Saving Index
New File: 1 GB
Verifying
Ok. Continuing...
--------------------------------------------------------------------------------
Retention Rules
Rules will be applied to all backup sets in the destination folder
--------------------------------------------------------------------------------
I/O Performance: Read 1.8 Gb/s - Write 1.1 Gb/s
--------------------------------------------------------------------------------
Image and Verification Completed Successfully in 00:07:04


My I/O Performance doesn't show any kind of slow read or write, yet the Incremental for 1 GB took 7 minutes.  Could the CBT Init using the MFT have slowed it down that much?


Thanks!

EatableFever2
EatableFever2
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Yes, I see a similar scenario if I see "CBT Init Using MFT  - Volume reset   etc ....    Macrium  7.3.5555  Windows 10 20H2 19042.804

My typical Incremental daily image takes about 10-15 mins for 3 to 4GB from an Optane enabled Western Digital HDD to a USB3 attached Seagate Expansion HDD on a Lenovo Laptop.
If Windows has 'crashed' and and it has failed to shut down properly then the "CBT Init using MFT" will appear and the backup, Incremental or Differential will take up to 10 times longer.  The extra time is ALL in the saving partition phase and during this time the source disk is at 100% activity.
Usually, the next Incremental, or Differential backup doesn't show the "using MFT" message and takes the normal elapsed time.

I guess it's just the way it works, but why it hammers the source disk I don't know.

I'm also about to post a new problem, if I'm allowed about Macrium miscounting Differential backups.
GO

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