First, the writing of banks is completely independent of the history system. Banks go to the log file only, 
while the history is only linked to the "Variables" section in the ODB.

Second, it's advisable to group similar equipment into one. Like if you have five power supplies powering
and experiment, you don't want to have five equipments Supply1, Supply2, ..., but only one equipment
"Power Supplies". In the frontend belonging to that equipment, you define a DEVICE_DRIVER list with
one entry for each power supply. If you interact with an mscb device, there are some helper functions
which simplify the definition of the equipment and which I can send you privately. So your device
driver looks a bit like the one attached.

If you cannot do that and absolutely want separate equipments, please post a complete ODB subtree of your
settings, and I can try to reproduce your problem.

Stefan

======================

DEVICE_DRIVER power_driver[] = {
   {"Power Supply 1", mscbdev, 0, NULL, DF_INPUT | DF_MULTITHREAD},
   {"Power Supply 2", mscbdev, 0, NULL, DF_INPUT | DF_MULTITHREAD},
   {"Power Supply 3", mscbdev, 0, NULL, DF_INPUT | DF_MULTITHREAD},
   {""}
};

...

INT frontend_init()
{
   mscb_define("mscbxxx.psi.ch", "Power Supplies", "Power Supply 1", power_driver, 1, 0, "Output 1", 0.1);
   mscb_define("mscbxxx.psi.ch", "Power Supplies", "Power Supply 1", power_driver, 1, 1, "Output 2", 0.1);
   ...
}

/*-- Function to define MSCB variables in a convenient way ---------*/

void mscb_define(const char *submaster, const char *equipment, const char *devname, 
                 DEVICE_DRIVER *driver, int address, unsigned char var_index, 
                 const char *name, double threshold)
{
   int i, dev_index, chn_index, chn_total;
   char str[256];
   float f_threshold;
   HNDLE hDB;

   cm_get_experiment_database(&hDB, NULL);

   if (submaster && submaster[0]) {
      sprintf(str, "/Equipment/%s/Settings/Devices/%s/Device", equipment, devname);
      db_set_value(hDB, 0, str, submaster, 32, 1, TID_STRING);
      sprintf(str, "/Equipment/%s/Settings/Devices/%s/Pwd", equipment, devname);
      db_set_value(hDB, 0, str, "meg", 32, 1, TID_STRING);
   }

   /* find device in device driver */
   for (dev_index=0 ; driver[dev_index].name[0] ; dev_index++)
      if (equal_ustring(driver[dev_index].name, devname))
         break;

   if (!driver[dev_index].name[0]) {
      cm_msg(MERROR, "mscb_define", "Device \"%s\" not present in device driver list", devname);
      return;
   }

   /* count total number of channels */
   for (i=chn_total=0 ; i<=dev_index ; i++)
      if (((driver[dev_index].flags & DF_INPUT) > 0 && (driver[i].flags & DF_INPUT)) ||
          ((driver[dev_index].flags & DF_OUTPUT) > 0 && (driver[i].flags & DF_OUTPUT)))
      chn_total += driver[i].channels;

   chn_index = driver[dev_index].channels;
   sprintf(str, "/Equipment/%s/Settings/Devices/%s/MSCB Address", equipment, devname);
   db_set_value_index(hDB, 0, str, &address, sizeof(int), chn_index, TID_INT, TRUE);
   sprintf(str, "/Equipment/%s/Settings/Devices/%s/MSCB Index", equipment, devname);
   db_set_value_index(hDB, 0, str, &var_index, sizeof(char), chn_index, TID_BYTE, TRUE);

   if (threshold != -1 && (driver[dev_index].flags & DF_INPUT) > 0) {
     sprintf(str, "/Equipment/%s/Settings/Update Threshold", equipment);
     f_threshold = (float) threshold;
     db_set_value_index(hDB, 0, str, &f_threshold, sizeof(float), chn_total, TID_FLOAT, TRUE);
   }

   if (name && name[0]) {
      sprintf(str, "/Equipment/%s/Settings/Names %s", equipment, devname);
      db_set_value_index(hDB, 0, str, name, 32, chn_total, TID_STRING, TRUE);
   }

   /* increment number of channels for this driver */
   driver[dev_index].channels++;
}