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On 26/09/2021 16:38, Peter Humphrey wrote: |
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> Or, I could connect a second USB-3 drive to a different interface, then read |
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> from one and write to the other, with or without the SATA between. |
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If you've got a second drive, consider changing your strategy ... |
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First of all, you want eSATA or USB3 for the speed ... |
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Format the drive with lvm, and create an lv-partition big enough to hold |
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your backup, but not much more. |
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Work out the syntax for an in-place rsync backup (sorry I haven't done |
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it, I can't help. |
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Every time you make a backup, snapshot the lv before you do it. |
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That way, the inplace rsync will only actually write data that has |
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changed. Your backup volume will grow at an incremental rate, but you'll |
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actually have full backups. |
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The only downside is if the backup gets damaged, it will corrupt every |
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copy of the files affected at one stroke, bit if you are using said |
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second drive, you can repurpose your first drive if you can back up |
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those tar files to dvd or whatever (or throw them away if they've served |
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their purpose, but I guess they haven't ...). And by alternating the |
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backup drives, you've got two distinct copies. |
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Cheers, |
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Wol |
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