Index: sbin/fsck_ffs/fsutil.c
===================================================================
--- sbin/fsck_ffs/fsutil.c
+++ sbin/fsck_ffs/fsutil.c
@@ -558,9 +558,7 @@
 		slowio_start();
 	totalreads++;
 	diskreads++;
-	if (lseek(fd, offset, 0) < 0)
-		rwerror("SEEK BLK", blk);
-	else if (read(fd, buf, (int)size) == size) {
+	if (pread(fd, buf, (int)size, offset) == size) {
 		if (bkgrdflag)
 			slowio_end();
 		return (0);
@@ -611,9 +609,7 @@
 		return;
 	offset = blk;
 	offset *= dev_bsize;
-	if (lseek(fd, offset, 0) < 0)
-		rwerror("SEEK BLK", blk);
-	else if (write(fd, buf, size) == size) {
+	if (pwrite(fd, buf, size, offset) == size) {
 		fsmodified = 1;
 		return;
 	}