"How to" for DAQ

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This "How to" is assuming you are working in the DAQ.

How to Start the DAQ?

In the DAQ,

~$cd digios/daq

If you are in the MAC, ssh to the DAQ by


Please read the guide : Check the Guide for DAQ

The guide is kind of old, but the essential is there.

How to start the Database program ?

on the HELIOS commander, there is a button "Database" near the button "Stop"

How to deal with Buffer alert?

Usually, the buffer is low when there are too many triggers and cannot flush the data to the DAQ.

In many cases, the Database program will check the buffer level, if any VME buffer level is smaller than 300, the ACQ will be stooped for 30 sec and resume automatically.

How to Set Trigger?

anywhere>SetTrigger [VME] [DIG] [Plane]

There are two triggers, called X-Plane and Y-Plane, it has nothing todo with plane or beyond my imagination. .

when IOC switch off suddenly, what should I do ?

stop the run, wait for few minutes, start again.

if this keeps happening, reboot the DAQ.

How to pushing Grafana screenshot to ANL web page?

see Grafana + InfluxDB

How to Setup Globus connection, Sound Alarm, and Auto-Screenshot Capture ?

~>./helios_monitor start

How to mount a new Hard Disk

Suppose the Harddisk appeared on /dev/sdd

and you wish to mount to /mount/DIGIOSDATA6

and the HD is formated as ext4

the commmand to mount is:

sudo mount -t ext4 -o rw /dev/sdd /mount/DIGIOSDATA6

if you mount as

sudo mount /dev/sdd /mount/DIGIOSDATA6

the HD is only read but NOR write.

Auto mount Harddisk at startup

Assume you already can mount the HD.

frist, you need to know the disk UUID

$ls -al /dev/disk/by-uuid
lrwxrwxrwx. 1 root root   9 Jan  5 09:14 48e123eb-7613-4ef4-b9e4-eb53283ddcdf -> ../../sdc
lrwxrwxrwx. 1 root root   9 Jan  5 09:14 575cde2b-1adf-4bf0-af91-74601ef294c1 -> ../../sdb
lrwxrwxrwx. 1 root root  10 Jan  5 09:14 de9962db-d5ec-4f07-8da7-3ef50c257135 -> ../../sda5
lrwxrwxrwx. 1 root root  10 Jan  5 09:14 dbccbb90-6026-4913-931a-b71e169d17ed -> ../../sda3
lrwxrwxrwx. 1 root root  10 Jan  5 09:14 6afd3d3e-d944-44d8-95cf-64d76118763a -> ../../sda1
lrwxrwxrwx. 1 root root  10 Jan  5 09:14 958f0586-b338-4255-ab62-a86447e549e4 -> ../../sda6
lrwxrwxrwx. 1 root root  10 Jan  5 09:14 99b398a6-20c6-4f2b-b680-a4bc8afce1c4 -> ../../sda2

then have to edit the file /etc/fstab

# /etc/fstab
# Created by anaconda on Wed Jan 30 13:24:43 2013
# Last edit by Ryan on Sat Nov 21 16:42 2020
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
UUID=dbccbb90-6026-4913-931a-b71e169d17ed /                       ext4    defaults        1 1
UUID=6afd3d3e-d944-44d8-95cf-64d76118763a /boot                   ext4    defaults        1 2
UUID=958f0586-b338-4255-ab62-a86447e549e4 /global                 ext4    defaults        1 2
UUID=99b398a6-20c6-4f2b-b680-a4bc8afce1c4 /home                   ext4    defaults        1 2
UUID=de9962db-d5ec-4f07-8da7-3ef50c257135 swap                    swap    defaults        0 0
UUID=575cde2b-1adf-4bf0-af91-74601ef294c1 /media/DIGIOSDATA4      ext4    defaults        0 0
UUID=48e123eb-7613-4ef4-b9e4-eb53283ddcdf /media/DIGIOSDATA5      ext4    defaults        0 0
#UUID=43f42e85-fd83-42d7-8e4b-46323a858cc3 /media/DIGIOSDATA6      ext4    defaults        0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0

/dev/sdb		/media/DIGIOSDATA4	ext4   	users,rw,owner,umask=000 0 0
/dev/sdc		/media/DIGIOSDATA5	ext4    users,rw,owner,umask=000 0 0
#/dev/sdd		/media/DIGIOSDATA6	ext4    users,rw,owner,umask=000 0 0
#/dev/sdd		/media/DIGIOSDATA3	vfat    users,rw,owner,umask=000 0 0

Copy the UUID and put the corresponding format, following the example of /media/DIGIOSDATA5. In the above example, DIGISODATA6 had been taken out.

Workflow of DAQ

Workflow of DAQ.png