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docs(zfs): Add Unmap/TRIM commands (#1)

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hygienic-books 2023-03-05 06:02:11 +01:00
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@ -158,6 +158,8 @@ In order to generate a new master key after you've changed your user key as ment
## Finishing touches ## Finishing touches
### Confirm master key change
Just to confirm that the master key has changed run this command. It takes a moment to output data: Just to confirm that the master key has changed run this command. It takes a moment to output data:
``` ```
@ -166,6 +168,29 @@ zfs send --raw zpool/root/archlinux-frn@rekey | zstream dump | sed -n -e '/crypt
Repeat for source dataset `zpool/root/archlinux-sxu@rekey`. You're particularly interested in parameters `DSL_CRYPTO_MASTER_KEY_1` and the initialization vector `DSL_CRYPTO_IV`. Notice that they differ between old and new dataset confirming that your new dataset has a new master key. Repeat for source dataset `zpool/root/archlinux-sxu@rekey`. You're particularly interested in parameters `DSL_CRYPTO_MASTER_KEY_1` and the initialization vector `DSL_CRYPTO_IV`. Notice that they differ between old and new dataset confirming that your new dataset has a new master key.
### Unmap/TRIM
Next up unmap/TRIM unallocated disk areas. If your zpool runs on an entire disk and not just on a partition, and if your disk supports TRIM you're going to want to do:
```
zpool trim --secure zpool
```
The next best alternative is to instead do:
```
zpool initialize zpool
```
View status with either one of:
```
# With TRIM status
zpool status -t zpool
# Without TRIM status
zpool status zpool
```
### Clean-up
Optionally you may want to clean up: Optionally you may want to clean up:
1. In newly keyed/reencrypted system dataset destroy its snapshot 1. In newly keyed/reencrypted system dataset destroy its snapshot