K 10 svn:author V 8 mckusick K 8 svn:date V 27 2018-04-08T06:59:42.582910Z K 7 svn:log V 265 The ufs_disk_write() function is used to upgrade a read-only descriptor to a read-write descriptor. Do not close the read-only descriptor until the read-write is successfully obtained. Before this fix, a failed upgrade left no usable descriptor with which to work. END