"Delete oldest backup sets" deletes all backups on drive


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jdnicholas
jdnicholas
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Hi - have question about the "delete oldest backup sets" functionality.  I have it set to (or perhaps, what I want is to) trim just enough old backups when free space (on a 4TB drive) falls below 500Gb so as to make enough space for the current backup (approx 470Gb).  As you see from the log below Macrium however deleted every backup on the drive rather than just the ones required to make space for the current backup.  Why is that?  I didn't find the help text illuminating but the use of "Delete oldest" in the field name (rather than "Delete all backup sets other than") implies it to be the intuitively desirable functionality - a flexible selective delete to make enough space, yet that's not what's happening.

Is there a conflicting setting with my backup definition perhaps, or is the field name misleading - does it by design delete every backup set other than the fixed number specified up in the "Keep nnn Backups" retention rules group?  Why would someone want to do that with, perhaps, a heterogeneous set of backup drives of varying capacities?  Is there a way to have Macrium use some non-hard-coded intelligence in selecting what it deletes?

Much appreciated,
JD

http://forum.macrium.com/uploads/images/b9c58834-41e7-4720-ac71-197a.png

Macrium Reflect Log
Imaging Summary

Backup Definition File:D:\Users\JD\Documents\Reflect\HGST4TBHM.xml
Auto Verify:N
Maximum File Size:Automatic
Compression:Medium
Password:Y
AES Encryption:Medium 192 Bit
Intelligent Copy:Y
Power Saving:N
Total Selected:559.67 GB

Retention Rules
Rules will be applied to all backup sets in the destination folder

Destination:
Backup Type:Full
File Name:M:\E14D70EF66FA5C29-00-00.mrimg
Alternative location:N:\
O:\

Operation 1 of 3
Hard Disk:1
Drive Letter:N/A
File System:NTFS
Label:System Reserved
Size:100.0 MB
Free:61.7 MB
Used:38.3 MB

Operation 2 of 3
Hard Disk:1
Drive Letter:C
File System:NTFS
Label:SSD250GB
Size:232.79 GB
Free:148.57 GB
Used:84.21 GB

Operation 3 of 3
Hard Disk:2
Drive Letter:D
File System:NTFS
Label:HGST1TBINT
Size:931.51 GB
Free:456.09 GB
Used:475.42 GB

Starting Image - Saturday, June 20, 2015 19:20:53
Initializing
Validating location:M:\ - Invalid (The system cannot find the path specified.)
Using Location:N:\
Destination Drive:HGST4TB_BU (NSmile - Free Space 793.78 GB
Free space threshold:Delete oldest backup sets when free space is less than 500.00 GB
Creating Volume Snapshot - Please Wait
Volume Snapshots Created
Analyzing file system on volume
Analyzing file system on volume C:
Analyzing file system on volume D:

Saving Partition - System Reserved
Reading File System Bitmap
Saving Partition

Saving Partition - SSD250GB (CSmile
Reading File System Bitmap
Saving Partition
Free space low:500.00 GB required 4.00 GB available
Backup Sets:5 sets found
Delete File:N:\50B2061193E27A84-00-00.mrimg
Delete File:N:\50B2061193E27A84-01-01.mrimg
Delete File:N:\50B2061193E27A84-02-02.mrimg
Delete File:N:\50B2061193E27A84-03-03.mrimg
Delete File:N:\50B2061193E27A84-04-04.mrimg
Delete File:N:\50B2061193E27A84-05-05.mrimg
Delete File:N:\28ADA1663A895270-00-00.mrimg
Delete File:N:\28ADA1663A895270-01-01.mrimg
Delete File:N:\28ADA1663A895270-02-02.mrimg
Delete File:N:\28ADA1663A895270-03-03.mrimg
Delete File:N:\28ADA1663A895270-04-04.mrimg
Delete File:N:\28ADA1663A895270-05-05.mrimg
Delete File:N:\28ADA1663A895270-06-06.mrimg
Delete File:N:\28ADA1663A895270-07-07.mrimg
Delete File:N:\28ADA1663A895270-08-08.mrimg
Delete File:N:\28ADA1663A895270-09-09.mrimg
Delete File:N:\7D2640D5DACE4C66-00-00.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-00-00.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-01-01.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-02-02.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-03-03.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-04-04.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-05-05.mrimg
Delete File:N:\BD5D9CA8BBCB9FDC-06-06.mrimg
Delete File:N:\B13D3308086CDD5A-00-00.mrimg
Delete File:N:\B13D3308086CDD5A-01-01.mrimg
Delete File:N:\B13D3308086CDD5A-02-02.mrimg
Delete File:N:\B13D3308086CDD5A-03-03.mrimg
Delete File:N:\B13D3308086CDD5A-04-04.mrimg
Delete File:N:\B13D3308086CDD5A-05-05.mrimg
Delete File:N:\B13D3308086CDD5A-06-06.mrimg

Saving Partition - HGST1TBINT (DSmile
Reading File System Bitmap
Saving Partition

Saving Index
New File: 444 GBE14D70EF66FA5C29-00-00.mrimg

Image Completed Successfully in 01:57:17

I/O Performance:Read 1.8 Gb/s - Write 777.5 Mb/s


Stephen
Stephen
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Hi JD,

Thanks for posting and welcome to the forum.

Please can you update to the latest build of Reflect as it has some improvements to the retention rules (and logging) and then try backing up again.


http://forum.macrium.com/uploads/images/943b6eb3-09cc-4808-9e48-0d6e.png


Kind Regards

Stephen

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sam9978
sam9978
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Sorry for bringing up an old post. However, I'm having this exact same issue and am using the latest version of Reflect 7. Any thoughts on how I can fix this? It's a major fail to have all old backups deleted when low on space.

Thank you!
jphughan
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sam9978 - 6 October 2021 3:03 AM
Sorry for bringing up an old post. However, I'm having this exact same issue and am using the latest version of Reflect 7. Any thoughts on how I can fix this? It's a major fail to have all old backups deleted when low on space.

Thank you!

Please post the job log from the backup that exhibited unexpected deletion behavior.  Note however that the option deletes old backup SETS, not old BACKUPS.  A set is defined as a Full and all child backups.  So if the only existing backups you had were a single older Full and child backups of that Full, then that option would delete all of your backups.  That is by design.  That option will also never delete backups within the current set, i.e. the current Full and any of its child backups.  One reason is that with different backup strategies, people would want different backups within their current set to be deleted.  Some might want the oldest backups deleted, while others might prefer to sacrifice Incrementals to preserve Differentials, as just one example.  In any case, that means that this option is NOT a substitute for specifying a retention policy that is achievable based on your available storage capacity and the size and quantity of your backups.

If what I just wrote doesn't account for the behavior you observed, again please post the job log for review.  Make sure to omit your Reflect license key, which appears at the bottom of the log.

sam9978
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Thank you for the info. I'll double-check and make sure I'm not doing something wrong on my end.
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