The offline scanner performs some prerequisite checks before it starts scanning.


SVC / Storwize user authentication and user role

The SVC / Storwize system user for the scanner must have administrative rights.
The combination username/password or username/ssh-private-key file must be accepted.

SVC / Storwize time synchronization

Before scanning is started on the affected SVC or Storwize system, the following actions have to be performed:

  • Ensure the correct configuration of the SVC cluster time and time zone (eg: Europe / Berlin, UTC ...)
    The time on all nodes has to be synchronized with NTP.

  • (warning) Important! Also the clocks on the BVQ server and SVC nodes have to be synchronized!

  • The best way to ensure this is achieved by using NTP:
    • BVQ scanner system: time synchronization with NTP server option

    • SVC cluster before 4.3.1:
      Master console: enable time synchronization with NTP server.
      Master console: daily (eg, at 12:00 clock) to execute script clock-synchronization via Windows Scheduler.

    • SVC cluster from 4.3.1:
      Time synchronization with NTP server option.
CLI procedure:
### Set Timezone and NTP ###
svctask settimezone -timezone 360             ### Timezone 360: Europe/Berlin !!!
svctask chcluster -ntpip <IP adress of NTP Server> ### Example: svctask chcluster -ntpip

SVC performance statistics interval

The SVC performance data is copied in regular intervals by BVQ Scanner. To achieve this, BVQ requires a solid SVC performance statistics interval of 5 minutes or less.

  • Check whether old remnants of 'iostat' files on the SVC clusters exist and delete them if necessary (SVC GUI - \> list dumps ...)
  • SVC performamce statistics enable tracing in 5min intervals, 1 minute is also possible but should only be used in special cases!
CLI procedure:
### Sweep and start Perfstats ###
svcinfo lsnode  -nohdr | while read id rest ; do svctask cleardumps -prefix /dumps/iostats $id ; done
svctask startstats -interval 5


Local filespace write access and free space

The data is collected in subdirectories and stored in the same filespace as the scanner binaries. Later this data will be put into a .zip file, typically stored into the directory 'My Documents'.
You need write access to this filespace and enough free space for the raw data and the .zip file.

The needed capacity is mostly depending on the number of scanned volumes.

Some estimated values:

Number of volumes

Daily output

Scanner directory

10 days output

Scanner directory

Zipped 10 days output
for my documents
20070 MB700 MB180 MB
500170 MB1650 MB400 MB
1000330 MB3300 MB800 MB


1700 MB16500 MB4000 MB
100003300 MB33000 MB8000 MB