Date: Mon, 21 Sep 2015 11:28:56 -0700 From: Chris Stankevitz <chris@stankevitz.com> To: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Name/label/id metadata: how do I make it go away Message-ID: <56004C68.4020904@stankevitz.com>
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Hi, For those wanting to teach me to fish: In the context of naming a disk that has no partitions, can you explain to me the difference among these terms: - gpt label - gpt id - glabel - gpart - /dev/diskid/* - disk_ident - geom - bsdlabel For those wanting to give me a fish: I have a zfs pool of "entire disks". "zpool status" shows some disks with their daX name (which I prefer) and some with a hideously ugly name such as DISK-%20%20%20%20%20-WD-WMC4NOH1ASDF I can make the hideously ugly names temporarily go away with: zpool export foo glabel stop diskid/DISK-%20%20%20%20%20-WD-WMC4NOH1ASDF zpool import foo However I cannot make them permanently go away: zpool export foo glabel clear da6 > Can't clear metadata on da6: Invalid argument. In a prior life these drives were in a FreeNAS setup which presumably added the labels. I did not erase the labels before I recommissioned the drives in my new FreeBSD setup. I'm happy to use dd to erase the metadata but I do not know how the labels were added. Presumably when I understand that I will know which blocks need to be zero-ed out. I need to "surgically" dd to avoid data loss from my zfs disks. I have backups.... actually the problem pool is a backup pool. Thank you, Chris
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