diff --git a/tecs/tecs.c b/tecs/tecs.c
index f96a758d..513c2fe7 100644
--- a/tecs/tecs.c
+++ b/tecs/tecs.c
@@ -508,6 +508,7 @@ int PeriodicTask(void) {
   char buf[256], lbuf[16];
   char *res;
   int i, k;
+  time_t putTim;
   float t2[2], p, d, w;
 
   ERR_P(LscCmd(ser, "DIOST?>cod1,out1;DOUT 3,29;HTR?>htr;BUSY?>busy"));
@@ -552,8 +553,13 @@ int PeriodicTask(void) {
   if (cryo.dirty==0 && samp.dirty==0 && noResp==0 && tim>logTime) {
     t2[0]=cryo.temp;
     t2[1]=samp.temp;
-    DlogPut(&dset, tim, 2, t2); DlogUpd(&dset);
-    logTime=(tim/logPeriod+1)*logPeriod;
+    time(&putTim);
+    DlogPut(&dset, putTim, 2, t2); DlogUpd(&dset);
+    logTime=(putTim/logPeriod+1)*logPeriod;
+    time(&tim);
+    if (tim-putTim>1) {
+      logfileOut(LOG_MAIN, "needed %d sec. for filling in dlog\n", tim-putTim);
+    }
   }
   if (samp.nSens>0 && cryo.nSens>0 && controlMode==2 && tempC!=0) {
     d=(tempH-cryo.temp)/cryo.temp-1.0; /* relative difference */
@@ -842,6 +848,8 @@ int mainBody(void)
       if (!noResp) logfileOut(LOG_MAIN ,"no response\n");
       per=period+10000; /* long period if no response */
       noResp=1;
+      cryo.temp=0;
+      samp.temp=0;
       return(0);
     }
     return(-1);
@@ -994,7 +1002,7 @@ int main(int argc, char *argv[])
     logfileOut(LOG_INFO, "opened\n");
   }
   logfileWrite(logMask);
-  ERR_P(LscCmd(ser, "MODE:[mode]"));
+  LscCmd(ser, "MODE:[mode]");
   per=period;
   cntError=0;
   while (!quit) {
diff --git a/tecs/tecs_dlog.c b/tecs/tecs_dlog.c
index f10af1b5..896fd8d0 100644
--- a/tecs/tecs_dlog.c
+++ b/tecs/tecs_dlog.c
@@ -31,6 +31,46 @@ int DlogWrite(DlogSet *dset, int idx, void *data) {
     return(-1);
 }
 
+#define FILL_BUF_SIZE 1024
+
+int DlogFill(DlogSet *dset, int from, int to) {
+  int p, q, e, i, size;
+  float fill[FILL_BUF_SIZE];
+
+  for (i=0;i<FILL_BUF_SIZE;i++) fill[i]=dset->undef;
+  e = 0;
+  if (to-from>=dset->nlen) { /* fill all */
+    p = dset->headsize;
+    q = dset->headsize + dset->nlen * dset->fsize;
+  } else {
+    p = dset->headsize + (from % dset->nlen) * dset->fsize;
+    q = dset->headsize + (to % dset->nlen) * dset->fsize;
+    if (q<p) {
+      e = q;
+      q = dset->headsize + dset->nlen * dset->fsize;
+    }
+  }
+  ERR_SI(lseek(dset->fd, p, SEEK_SET));
+  for (i=p; i<q-sizeof(fill); i+=sizeof(fill)) {
+    ERR_SI(write(dset->fd, fill, sizeof(fill)));
+  }
+  if (q>i) ERR_SI(write(dset->fd, fill, q-i));
+
+  if (e>0) {
+    p = dset -> headsize;
+    ERR_SI(lseek(dset->fd, p, SEEK_SET));
+    for (i=p; i<e-sizeof(fill); i+=sizeof(fill)) {
+      ERR_SI(write(dset->fd, fill, sizeof(fill)));
+    }
+    if (e>i) ERR_SI(write(dset->fd, fill, q-i));
+  }
+  dset->pos = -1; /* set position to undefined */
+  return(0);
+  OnError:
+    return(-1);
+}
+
+/*
 int DlogRead(DlogSet *dset, int idx, void *data) {
   int p;
 
@@ -44,6 +84,25 @@ int DlogRead(DlogSet *dset, int idx, void *data) {
   OnError:
     return(-1);
 }
+*/
+
+int DlogRead(DlogSet *dset, int idx, int max, void *data) {
+  int i, p, m;
+
+  i = idx % dset->nlen;
+  p = dset->headsize + i * dset->fsize;
+  if (max > dset->nlen - i) {
+    max = dset->nlen - i;
+  }
+  if (p!=dset->pos) {
+    ERR_SI(lseek(dset->fd, p, SEEK_SET));
+  }
+  ERR_SI(read(dset->fd, data, dset->fsize * max));
+  dset->pos = p + dset->fsize * max;
+  return(max);
+  OnError:
+    return(-1);
+}
 
 int DlogOpenOld(DlogSet *dset, char *name, int write) {
   int i, p, np, fd, flags;
@@ -122,7 +181,7 @@ int DlogOpenWrt(DlogSet *dset, char *name, time_t start, int nset, int nlen, int
     return(-1);
 }
 
-int DlogPut(DlogSet *dset, time_t time, int nset, float val[]) {
+int DlogPut(DlogSet *dset, time_t tim, int nset, float val[]) {
   int i, i0, j;
   float f[DLOG_MAX_SET], f0[DLOG_MAX_SET];
 
@@ -131,11 +190,11 @@ int DlogPut(DlogSet *dset, time_t time, int nset, float val[]) {
   for (j=0; j < nset; j++) { f[j]=val[j]; }
   for (j=nset; j < dset->nset; j++) { f[j]=dset->undef; }
 
-  i = ( time - dset->start ) / dset->period;
+  i = ( tim - dset->start ) / dset->period;
   i0 = ( dset->last - dset->start ) / dset->period;
   
   if (i0==i) {
-    ERR_I(DlogRead(dset, i, f0));
+    ERR_I(DlogRead(dset, i, 1, f0));
     for (j=0; j<nset; j++) {
       if (DEFINED(f0[j]) && /* when last point defined */
          (i%2 && f0[j]>f[j] || /* take maximum (for odd i) */
@@ -143,23 +202,20 @@ int DlogPut(DlogSet *dset, time_t time, int nset, float val[]) {
         ) f[j]=f0[j];          /* of f0 and f0 */
     }
   } else if (i0<i-1) {
-    for (j=0; j < dset->nset; j++) { f0[j]=dset->undef; }
-    i0++;
-    while (i0<i) {
-      ERR_I(DlogWrite(dset, i0, f0));
-      i0++;
-    }
+    DlogFill(dset, i0+1, i);
   }
   ERR_I(DlogWrite(dset, i, f));
-  dset->last=time;
+  dset->last=tim;
   return(0);
   OnError:
     return(-1);
 }
 
+#define RD_BUF_SIZE 1024
+
 int DlogGet(DlogSet *dset, int iset, int nmax, double *starttime, float x[], float y[]) {
-  int i0, i1, i, n, undef;
-  float f[DLOG_MAX_SET];
+  int j, i0, i1, i, n, nread, undef;
+  float f, fbuf[RD_BUF_SIZE+1];
 
   if (iset<0) ERR_MSG("illegal iset");
   if (iset>=dset->nset) return(0);
@@ -176,21 +232,24 @@ int DlogGet(DlogSet *dset, int iset, int nmax, double *starttime, float x[], flo
   n=0;
   undef=2;
   while (i0<=i) {
-    if (n>=nmax) return(n);
-    ERR_I(DlogRead(dset, i0, f));
-    i0++;
-    if (DEFINED(f[iset])) {
-      x[n]=(float)(i0-i1)*dset->period;
-      y[n]=f[iset];
-      n++;
-      undef=0;
-    } else if (undef==0) {
-      undef=1;
-    } else if (undef==1) {
-      undef=2;
-      x[n]=0;
-      y[n]=0;
-      n++;
+    ERR_I(nread=DlogRead(dset, i0, RD_BUF_SIZE/dset->nset, fbuf));
+    for (j=0; j<nread; j++) {
+      if (n>=nmax) return(n);
+      f=fbuf[j * dset->nset + iset];
+      i0++;
+      if (DEFINED(f)) {
+        x[n]=(float)(i0-i1)*dset->period;
+        y[n]=f;
+        n++;
+        undef=0;
+      } else if (undef==0) {
+        undef=1;
+      } else if (undef==1) {
+        undef=2;
+        x[n]=0;
+        y[n]=0;
+        n++;
+      }
     }
   }  
   return(n);
diff --git a/tecs/test.for b/tecs/test.for
index 6ab12354..e272f21b 100644
--- a/tecs/test.for
+++ b/tecs/test.for
@@ -16,7 +16,7 @@
 	print *,'device <device>      set cryo device'
 	print *,'<parameter>          show parameter'
 	print *,'<parameter> <value>  set parameter'
-	print *,'quit                 close TecsServer and exit'
+	print *,'kill                 close TecsServer and exit'
 	print *,'exit                 exit, but do not close TecsServer'
 	print *,'help                 show list of parameters and cryo devices'
 	print *
@@ -39,8 +39,8 @@
 	if (k .eq. 0) then ! empty line
 	  call tecs_get_temp(6, temp)
 	  call tecs_get_par(6, 'device', device)
-	  print '(x,3(a,f8.3),2a)','tempX=', temp(2),', tempP=',temp(3)
-	1        ,', tempC=',temp(1), ', device=',device
+	  print '(x,3(a,f8.3),2a)','tempX=', temp(3),', tempP=',temp(2)
+	1        ,', set=',temp(1), ', device=',device
 	  goto 1
 	endif
 
@@ -57,7 +57,7 @@
 
 	! simple query
 
-	if (cmd .eq. 'quit') then
+	if (cmd .eq. 'kill') then
 	  call tecs_quit(6)
 	  goto 9
 	elseif (cmd .eq. 'exit') then
diff --git a/tecsdriv.c b/tecsdriv.c
index b524850e..108dfaf6 100644
--- a/tecsdriv.c
+++ b/tecsdriv.c
@@ -117,8 +117,8 @@
         }
         return 1;
       } else { /* get case or command without parameter */
-        if (0==strcasecmp(argv[1], "quit")) {
-          iRet=CocSet(pMe->pData,argv[1],"1"); /* send quit flag */
+        if (0==strcasecmp(argv[1], "kill")) {
+          iRet=CocSet(pMe->pData,"quit","1"); /* send quit flag */
           strcpy(result, "1");
         } else {
           iRet=CocGet(pMe->pData,argv[1],result); /* get parameter */