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Image Archive and Backups

Permanently deleted user

My C1 catalog and image archives are stored internally on my Mac.  I also have a backup image archive stored on an external HD.

Currently the catalog file is 23GB, and the image archive 246GB.  However the backup file is over twice the size of the archive (496GB) and I don’t know why.  Can you explain this difference, and which of the two is likely to be the true one?

I plan to remove my images from the internal drive and store them on a new external dual HD arranged as a RAID 1 array so that the dual drives automatically mirror each other thereby creating an image archive and backup.

Once this is complete I won’t need C1 to create a separate backup since this will be carried out routinely by the RAID array.

To populate the array in the first instance I was planning to copy my existing C1 image archive to the array and let it create the mirror copy.  However since the existing archive and backup files are of vastly different sizes I don’t know whether this would create the required result.

Any comments or advice would be gratefully received, many thanks. Roy.

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Comments

4 comments

Date Votes
  • OddS.

    > Roy Nailor:  ...RAID 1 array ... thereby creating an image archive and backup

    A flawed backup strategy in my mind.

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  • BeO
    • Edited
    Top Commenter

    Agree with OddS.

    A mirrored disk in a Raid is not a backup. You should consider it only as a storage with a slightly lower risk of data loss. Controller burns both disks, power spike burns the whole Raid, the Raid gets stolen or the room catches fire, you name it. I have my images on an internal disk, my first backup is a NAS with Raid1, my secondary backup another external disk. Ideally one backup is stored outside your place.

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  • Permanently deleted user

    Thanks fellas - Message received and understood about RAID array.  However can you answer the first part of my question about why my archive and backup file sizes are vastly different?

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  • BeO
    Top Commenter

    Do you have your images "In Catalog"?

    Sorry, cannot answer your question, I run C1 on WIndows, have my catalogs referencing the files (not In Catalog), and mirror my image files in my image folder structure when backing up (not a single big backup file).

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