=== modified file 'zsh-functions/confz_fs_init'
--- zsh-functions/confz_fs_init	2015-04-20 13:29:55 +0000
+++ zsh-functions/confz_fs_init	2015-04-20 13:11:49 +0000
@@ -138,7 +138,7 @@
 
 # set up /dev/md* device
 confz_mdraid_check() {
-	local level out seen_level seen_header devices all_empty
+	local level out seen_level seen_header devices present
 	local -a seen_devices devices
 	local -A level_map
 
@@ -199,18 +199,18 @@
 		return 0
 	fi
 
-	all_empty=1
 	for device in $devices; do
-		# all devices either need to have empty labels or be linux_raid_member
 		fs_blkid_probe $device
+		(( $+present )) || present=$fs_blkid_result
+		[[ $present != $fs_blkid_result ]] || \
+			die "$0: only some devices present"
 		if ! (($fs_blkid_result)); then
 			[[ ${fs_blkid_output[TYPE]:-} == linux_raid_member ]] || \
 				die "$0: non-raid label present on device: ${(qqq)device}"
-			all_empty=0
 		fi
 	done
 
-	if (($all_empty)); then
+	if (($present)); then
 		# empty labels
 		do_command=( mdadm --create -l $level --metadata=$vars[metadata] -n $#devices $vars[md_device] $devices )
 	else