diff --git a/dsbmc-cli.1 b/dsbmc-cli.1
index a40e017..4ec8b01 100644
--- a/dsbmc-cli.1
+++ b/dsbmc-cli.1
@@ -12,6 +12,7 @@
 .Op Fl L Ar ...
 .Nm
 .Fl a
+.Op Fl b Ar dev1,dev2,...
 .Bo
 .Fl U Ar time
 .Bc
@@ -103,6 +104,10 @@ option can be specified for each event. If
 automounts a device, it executes the command defined for the
 .Em mount
 event.
+.It Fl b
+A comma-separated list of devices to ignore if the
+.Fl a
+option is given.
 .It Fl e Ar device , Fl e Ar <mount point>
 Eject the given
 .Ar device
diff --git a/dsbmc-cli.c b/dsbmc-cli.c
index 93acbbf..76c19f7 100644
--- a/dsbmc-cli.c
+++ b/dsbmc-cli.c
@@ -41,7 +41,8 @@
 
 #include "libdsbmc/libdsbmc.h"
 
-#define PATH_LOCKF ".dsbmc-cli.lock"
+#define MAX_BLISTSZ 256
+#define PATH_LOCKF  ".dsbmc-cli.lock"
 
 #define EXEC(dh, f) do {						  \
 	if (f == -1)							  \
@@ -95,10 +96,13 @@ static void sighandler(int signo);
 static void pdie(void);
 static void remove_thread(pthread_t tid);
 static void add_unmount_thread(const dsbmc_dev_t *dev);
+static bool blacklisted(const char *);
 static void *auto_unmount(void *arg);
 static char *dtype_to_name(uint8_t type);
 static const dsbmc_dev_t *dev_from_mnt(const char *mnt);
 
+static char	 *blist[MAX_BLISTSZ];
+static size_t	 blistsz;
 static size_t	 unmount_time;
 static size_t	 ntids;
 static dsbmc_t	 *dh;
@@ -109,17 +113,17 @@ int
 main(int argc, char *argv[])
 {
 	int	      i, ch, speed;
-	bool	      sflag, vflag, eflag, fflag, Uflag;
+	bool	      sflag, vflag, eflag, fflag, bflag, Uflag;
 	bool	      Lflag, aflag, mflag, uflag, lflag, iflag;
-	char	      *image;
+	char	      *image, *p;
 	const char    seq[] = "-|/-\\|/";
 	struct stat   sb;
 	dsbmc_event_t e;
 	const dsbmc_dev_t *dev;
 
-	fflag = lflag = sflag = vflag = Uflag = false;
+	fflag = lflag = sflag = vflag = bflag = Uflag = false;
 	Lflag = aflag = eflag = mflag = uflag = iflag = false;
-	while ((ch = getopt(argc, argv, "L:U:afimusehv:l")) != -1) {
+	while ((ch = getopt(argc, argv, "L:U:ab:fimusehv:l")) != -1) {
 		switch (ch) {
 		case 'L':
 			Lflag = true;
@@ -132,6 +136,15 @@ main(int argc, char *argv[])
 		case 'a':
 			aflag = true;
 			break;
+		case 'b':
+			bflag = true;
+			for (p = optarg;
+			    (p = strtok(p, ",")) != NULL &&
+			    blistsz < MAX_BLISTSZ; p = NULL)
+				blist[blistsz++] = p;
+			if (blistsz >= MAX_BLISTSZ)
+				warnx("MAX_BLISTSZ (%d) exceeded", MAX_BLISTSZ);
+			break;
 		case 'f':
 			fflag = true;
 			break;
@@ -174,6 +187,8 @@ main(int argc, char *argv[])
 		usage();
 	if (!!mflag + !!uflag + !!eflag + !!sflag + !!vflag + !!iflag > 1)
 		usage();
+	if (bflag && !aflag)
+		usage();
 	if ((dh = dsbmc_alloc_handle()) == NULL)
 		err(EXIT_FAILURE, "dsbmc_alloc_handle()");
 	if (dsbmc_connect(dh) == -1)
@@ -415,6 +430,25 @@ dtype_to_name(uint8_t type)
 	return (empty);
 }
 
+static bool
+blacklisted(const char *dev)
+{
+	int  i;
+	char *path  = NULL;
+	bool listed = false;
+
+	for (i = 0; i < blistsz && !listed; i++) {
+		if ((path = realpath(blist[i], NULL)) == NULL) {
+			warn("realpath(%s)", blist[i]);
+			continue;
+		}
+		if (strcmp(dev, path) == 0)
+			listed = true;
+		free(path);
+	}
+	return (listed);
+}
+
 static void
 cb(int code, const dsbmc_dev_t *d)
 {
@@ -599,6 +633,8 @@ do_listen(bool automount, bool autounmount)
 				continue;
 			if (dev->mounted)
 				continue;
+			if (blacklisted(dev->dev))
+				continue;
 			do_mount(dev);
 			exec_event_command(EVENT_MOUNT, dev);
 			if (autounmount)
@@ -658,7 +694,8 @@ static void
 usage()
 {
 	PU("!-L <event> <command> [arg ...] ; [ -L ...]");
-	PU("-a [-U <time>] [[-L <event> <command> [arg ...] ; [-L ...]]");
+	PU("-a [-b dev1,dev2,...] [-U <time>] [[-L <event> <command> " \
+	    "[arg ...] ; [-L ...]]");
 	PU("{{-e | -u} [-f] | {-m | -s | -v <speed>}} <device>");
 	PU("{-e | -u} [-f] <mount point>");
 	PU("-i <disk image>");
diff --git a/readme.mdoc b/readme.mdoc
index e82185f..238d143 100644
--- a/readme.mdoc
+++ b/readme.mdoc
@@ -21,6 +21,7 @@ mount, unmount and eject these.
 .br
 .Nm
 .Fl a
+.Op Fl b Ar dev1,dev2,...
 .Bo
 .Fl U Ar time
 .Bc
@@ -29,6 +30,7 @@ mount, unmount and eject these.
 \;
 .Op Fl L Ar ...
 .Bc
+.br
 .Nm
 .Brq Bro Fl e | u Brc Bo Fl f Bc | Bro Fl m | s | u | v Ar speed Brc
 .Ar device
@@ -109,6 +111,10 @@ option can be specified for each event. If
 automounts a device, it executes the command defined for the
 .Em mount
 event.
+.It Fl b
+A comma-separated list of devices to ignore if the
+.Fl a
+option is given.
 .It Fl e Ar device , Fl e Ar <mount point>
 Eject the given
 .Ar device