error when trying to replace a disk of an encrypted pool

[treefrob]

Hello,
I'm running FreeNAS-11.3-U3.2 (1e9dd3b3e2). I have an encrypted RAIDZ2 pool (no passphrase) with 6 disks, with a dataset shared via NFS.

To test:

1. on an NFS client,I started writing data to the dataset
2. I physically removed one (ada2) of the drives
3. the pool status changed DEGRADED after a few seconds
4. the status of the drive had changed to REMOVED
5. I next went to pool -> status, clicked on the REMOVED disk's 3-dot button and selected "Replace", but the list of available disks was empty
6. I then set the drive to OFFLINE, and tried to "Replace" again, but still the list of available disks was empty
7. the User Guide seems to assert that a passphrase MUST be set before a disk can be replaced in an encrypted pool
8. I clicked on the lock-icon for the pool, but only had the choices "Recovery Key" and "Reset Keys" (no "Set Passphrase")
9. I chose "Reset Keys", got a dialog to set a passphrase and download the new key
10. I entered the admin password, a passphrase, clicked on RESET ENCRYPTION, and got a python backtrace. (see attached screen-shot and text with backtrace).
    • this seems like a bug.
11. next, it occurred to me that there might be an order dependency, so I physically removed disk again and re-inserted it
12. I went to pool -> status -> ada2 -> Replace, and this time the list of available disks had one entry: "ada2"
13. I selected "ada2" and continued, and replacement was successful

I'm a bit confused. The User Guide seems to insist that a passphrase must be set before a disk can be replaced in an encrypted pool, but it seems this was not necessary. This part of the User Guide is at best confusing, if not wrong

...or have I misunderstood?

-Rob

 

[Samuel Tai]

The order is as you've discovered:

1. First, set the RAIDZx member to OFFLINE. Acknowledge that the OFFLINE member can't be changed to ONLINE for encrypted pools.
2. Pull that member.
3. Insert replacement. Verify replacement appears under Storage->Disks as Unassigned.
4. Go back to the pool status, and initiate Replace for the OFFLINE member. Pull down to the new unassigned disk.
5. Resilvering will start, and will show the old disk in REPLACING status, and the new disk in ONLINE status. Let the resilver complete.
6. Reset keys for the pool, and set a passphrase. (Setting a passphrase will be ignored if the pool hosts the system dataset.)
7. Set a new recovery key for the pool.

 

[treefrob]

no comments about the backtrace or about documentation which seems to be wrong?