--- src/ftp.c.ORIG      2006-11-09 15:06:13.000000000 -0800
+++ src/ftp.c   2006-11-09 15:08:14.000000000 -0800
@@ -101,6 +101,10 @@
 #include "lukemftp.h"
 
 #include <arpa/telnet.h>
+#ifdef __APPLE__
+#include <sys/mount.h>
+#include <fcntl.h>
+#endif /* __APPLE__ */
 
 #include "ftp_var.h"
 
@@ -1055,6 +1059,31 @@
 
        progressmeter(-1);
 
+#ifdef __APPLE__       
+       /*
+        * Pre-allocate blocks for the destination file if it
+        * resides on Xsan.
+        * Take the restart position into consideration
+        * when computing the length.  PR-4074918
+        */
+       
+       if (filesize - restart_point > 0 ) {
+           struct statfs sfs;
+
+           if (fstatfs(fileno(fout), &sfs) == 0 &&
+             strcmp(sfs.f_fstypename, "acfs") == 0) {
+               fstore_t fst;
+               
+               fst.fst_flags = 0;
+               fst.fst_posmode = F_PEOFPOSMODE;
+               fst.fst_offset = 0;
+               fst.fst_length = filesize - restart_point;
+               
+               (void) fcntl(fileno(fout), F_PREALLOCATE, &fst);
+           }
+       }
+#endif /* __APPLE__ */
+
        switch (curtype) {
 
        case TYPE_I: