D. Eckert wrote:
(...) You don't move a pool with 'zfs umount', that only unmounts a single zfs filesystem within a pool, but the pool is still active.. 'zpool export' releases the pool from the OS, then 'zpool import' on the other machine. (...) with all respect: I never read such a non logic ridiculous .
You are not listening and you are not learning. You do not seem to understand the fundamentals of ZFS.
I have a single zpool set up over the entire available disk space on an external USB drive without any other filesystems inside this particular pool. so how on earth should I be sure, that the pool is still a live pool inside the operating system if the output of 'mount' cmd tells me, the pool is no longer attached to the root FS???? this doesn't make sense at all and it is a vulnerability of ZFS.
'mount' is not designed to know anything about the storage *pools*. Yes, you unmounted the filesystem and mount shows it is not mounted. This does not mean the zpool is not still imported and active.
so if the output of the mount cmd tells you the FS / ZPOOL is not mounted I can't face any reason why the filesystem should be still up and running, because I just unmounted the only one available ZPOOL.
No, you did not unmount the zpool.
And by the way: After performing: 'zpool umount usbhdd1' I can NOT access any single file inside /usbhdd1.
There is no 'zpool unmount' command.
What else should be released from the OS FS than a single zpool containing no other sub Filesystems?
Again, you have not 'released' the zpool.
Why? The answer is quite simple: The pool is unmounted and no longer hooked up to the system's filesystem. so what should me prevent from unplugging the usb wire?
Again, you are not understanding the fundamentals of ZFS. You may have unmounted the *filesystem*, but not the zpool. You yanked a disk containing a live, imported zpool.
Since the advice and information offered to you in this thread has been completely disregarded, the only thing left to say is: RTFM.
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