diff --git a/bin/pt-stalk b/bin/pt-stalk
index e332a916..f92f8263 100755
--- a/bin/pt-stalk
+++ b/bin/pt-stalk
@@ -795,7 +795,7 @@ collect() {
          fi
       fi
 
-      (echo $ts; df -h) >> "$d/$p-df" &
+      (echo $ts; df -k) >> "$d/$p-df" &
 
       (echo $ts; netstat -antp) >> "$d/$p-netstat"   &
       (echo $ts; netstat -s)    >> "$d/$p-netstat_s" &
diff --git a/lib/bash/collect.sh b/lib/bash/collect.sh
index ef56a3ad..23640fec 100644
--- a/lib/bash/collect.sh
+++ b/lib/bash/collect.sh
@@ -218,7 +218,7 @@ collect() {
          fi
       fi
 
-      (echo $ts; df -h) >> "$d/$p-df" &
+      (echo $ts; df -k) >> "$d/$p-df" &
 
       (echo $ts; netstat -antp) >> "$d/$p-netstat"   &
       (echo $ts; netstat -s)    >> "$d/$p-netstat_s" &
diff --git a/sandbox/servers/4.1/my.sandbox.cnf b/sandbox/servers/4.1/my.sandbox.cnf
index 8d8c1074..9c85eabe 100644
--- a/sandbox/servers/4.1/my.sandbox.cnf
+++ b/sandbox/servers/4.1/my.sandbox.cnf
@@ -22,6 +22,6 @@ log_slave_updates
 server-id                  = PORT
 report-host                = 127.0.0.1
 report-port                = PORT
-log-error                  = mysqld.log
+log-error                  = /tmp/PORT/data/mysqld.log
 innodb_lock_wait_timeout   = 3
 log
diff --git a/sandbox/servers/5.0/my.sandbox.cnf b/sandbox/servers/5.0/my.sandbox.cnf
index 858b9f62..eb00cea5 100644
--- a/sandbox/servers/5.0/my.sandbox.cnf
+++ b/sandbox/servers/5.0/my.sandbox.cnf
@@ -22,6 +22,6 @@ log_slave_updates
 server-id                  = PORT
 report-host                = 127.0.0.1
 report-port                = PORT
-log-error                  = mysqld.log
+log-error                  = /tmp/PORT/data/mysqld.log
 innodb_lock_wait_timeout   = 3
 log                        = genlog
diff --git a/sandbox/servers/5.1/my.sandbox.cnf b/sandbox/servers/5.1/my.sandbox.cnf
index 858b9f62..eb00cea5 100644
--- a/sandbox/servers/5.1/my.sandbox.cnf
+++ b/sandbox/servers/5.1/my.sandbox.cnf
@@ -22,6 +22,6 @@ log_slave_updates
 server-id                  = PORT
 report-host                = 127.0.0.1
 report-port                = PORT
-log-error                  = mysqld.log
+log-error                  = /tmp/PORT/data/mysqld.log
 innodb_lock_wait_timeout   = 3
 log                        = genlog
diff --git a/sandbox/servers/5.5/my.sandbox.cnf b/sandbox/servers/5.5/my.sandbox.cnf
index 967d5cf7..f47ab48d 100644
--- a/sandbox/servers/5.5/my.sandbox.cnf
+++ b/sandbox/servers/5.5/my.sandbox.cnf
@@ -22,7 +22,7 @@ log_slave_updates
 server-id                  = PORT
 report-host                = 127.0.0.1
 report-port                = PORT
-log-error                  = mysqld.log
+log-error                  = /tmp/PORT/data/mysqld.log
 innodb_lock_wait_timeout   = 3
 general_log
 general_log_file           = genlog