[zfs-discuss] zfs dataset version is reported as "-" and is not mountable

chris zfs-contact at citecs.de
Mon Feb 19 12:55:17 EST 2018


Hi,

after a server crash I can't mount a given dataset:

	zfs mount zp_qnap0/backup/hosts/imap

results in:

	unable to fetch ZFS version for filesystem 'zp_qnap0/backup/hosts/imap'
	cannot mount 'zp_qnap0/backup/hosts/imap': Resource temporarily unavailable

zfs get -r version zp_qnap0/backup/hosts/imap | nl -ba 
->
	1  NAME                                                    PROPERTY  VALUE    SOURCE
	2  zp_qnap0/backup/hosts/imap                              version   -        -
	3  zp_qnap0/backup/hosts/imap at weekly.2018-01-11T23:27:05Z  version   5        -
	4  zp_qnap0/backup/hosts/imap at weekly.2018-01-19T01:13:06Z  version   5        -
	5  zp_qnap0/backup/hosts/imap at weekly.2018-01-25T03:38:01Z  version   5        -
	6  zp_qnap0/backup/hosts/imap at weekly.2018-02-01T01:29:09Z  version   5        -
	7  zp_qnap0/backup/hosts/imap at daily.2018-02-05T07:54:36Z   version   5        -
	8  zp_qnap0/backup/hosts/imap at daily.2018-02-05T20:42:47Z   version   5        -

That "VALUE" in line 2 can't be correct.

For comparison a data set which works just fine:

zfs get -r version zp_qnap0/backup/hosts/vstest01 | nl -ba 
->
	1  NAME                                                        PROPERTY  VALUE    SOURCE
	2  zp_qnap0/backup/hosts/vstest01                              version   5        -
	3  zp_qnap0/backup/hosts/vstest01 at weekly.2018-01-08T19:59:49Z  version   5        -
	4  zp_qnap0/backup/hosts/vstest01 at weekly.2018-01-11T23:21:35Z  version   5        -
	5  zp_qnap0/backup/hosts/vstest01 at weekly.2018-01-26T12:29:01Z  version   5        -
	6  zp_qnap0/backup/hosts/vstest01 at weekly.2018-02-01T09:26:25Z  version   5        -
	7  zp_qnap0/backup/hosts/vstest01 at daily.2018-02-05T21:54:13Z   version   5        -
	8  zp_qnap0/backup/hosts/vstest01 at daily.2018-02-06T13:24:15Z   version   5        -

How do I fix this?

Regards, Chris


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