diff --git a/cmd_fs.c b/cmd_fs.c
index d6e2b223..8f45e364 100644
--- a/cmd_fs.c
+++ b/cmd_fs.c
@@ -9,6 +9,7 @@
 #include "libbcachefs/bcachefs_ioctl.h"
 #include "libbcachefs/darray.h"
 #include "libbcachefs/opts.h"
+#include "libbcachefs/super-io.h"
 
 #include "cmds.h"
 #include "libbcachefs.h"
@@ -122,18 +123,20 @@ static void replicas_usage_to_text(struct printbuf *out,
 				   const struct bch_replicas_usage *r,
 				   dev_names *dev_names)
 {
-	unsigned i;
-
 	if (!r->sectors)
 		return;
 
 	char devs[4096], *d = devs;
 	*d++ = '[';
 
-	for (i = 0; i < r->r.nr_devs; i++) {
+	unsigned durability = 0;
+
+	for (unsigned i = 0; i < r->r.nr_devs; i++) {
 		unsigned dev_idx = r->r.devs[i];
 		struct dev_name *dev = dev_idx_to_name(dev_names, dev_idx);
 
+		durability += dev->durability;
+
 		if (i)
 			*d++ = ' ';
 
@@ -150,6 +153,9 @@ static void replicas_usage_to_text(struct printbuf *out,
 	prt_printf(out, "%u/%u ", r->r.nr_required, r->r.nr_devs);
 	prt_tab(out);
 
+	prt_printf(out, "%u ", durability);
+	prt_tab(out);
+
 	prt_printf(out, "%s ", devs);
 	prt_tab(out);
 
@@ -204,20 +210,25 @@ static void fs_usage_to_text(struct printbuf *out, const char *path)
 	prt_newline(out);
 
 	printbuf_tabstops_reset(out);
-	printbuf_tabstop_push(out, 16);
-	printbuf_tabstop_push(out, 16);
-	printbuf_tabstop_push(out, 18);
-	printbuf_tabstop_push(out, 18);
 
+	printbuf_tabstop_push(out, 16);
 	prt_str(out, "Data type");
 	prt_tab(out);
 
+	printbuf_tabstop_push(out, 16);
 	prt_str(out, "Required/total");
 	prt_tab(out);
 
+	printbuf_tabstop_push(out, 14);
+	prt_str(out, "Durability");
+	prt_tab(out);
+
+	printbuf_tabstop_push(out, 14);
 	prt_str(out, "Devices");
 	prt_newline(out);
 
+	printbuf_tabstop_push(out, 14);
+
 	for (i = 0; i < BCH_REPLICAS_MAX; i++) {
 		if (!u->persistent_reserved[i])
 			continue;
diff --git a/libbcachefs.c b/libbcachefs.c
index 123109f8..82f131cf 100644
--- a/libbcachefs.c
+++ b/libbcachefs.c
@@ -728,6 +728,10 @@ dev_names bchu_fs_get_devices(struct bchfs_handle fs)
 		n.label = read_file_str(fs.sysfs_fd, label_attr);
 		free(label_attr);
 
+		char *durability_attr = mprintf("dev-%u/durability", n.idx);
+		n.durability = read_file_u64(fs.sysfs_fd, durability_attr);
+		free(durability_attr);
+
 		darray_push(&devs, n);
 	}
 
diff --git a/libbcachefs.h b/libbcachefs.h
index a16ae866..c6ff4bbd 100644
--- a/libbcachefs.h
+++ b/libbcachefs.h
@@ -242,6 +242,7 @@ struct dev_name {
 	char		*dev;
 	char		*label;
 	uuid_t		uuid;
+	unsigned	durability;
 };
 typedef DARRAY(struct dev_name) dev_names;