Where Do Those DBEs Go In MPE?
September 23, 2015
Where can I get help with storing and restoring an Allbase DBE?
Gilles Schipper replies
SQLUTIL.PUB.SYS should let you access the DBE. IMAGESQL is to a DBE what QUERY/DBUTIL is to TurboIMAGE.
Denys Beauchemin adds
ISQL.PUB.SYS is used to access the data in a DBE. If a TurboIMAGE database is attached to a DBE, there is a DBTC file for each Turbo database and an ATCINFO file with the DBE.
How can I find all the IMAGE databases on a system?
Michael Anderson replies:
IMAGE database root files all have a unique filecode value, -400. IMAGE datasets all have a value of -401. So if you want to find all IMAGE databases on a MPE system I would use the following command:
LISTFILE @[email protected]@;SELEQ=[CODE=-400];FORMAT=6
This will give you all the IMAGE root files and only the IMAGE root files. If you use something like “listf @[email protected]@” you get the first dataset in the database, but also any file where the filename ends with “01”, and that may or may not be a database file. Also, the MPE file system allows filecode representations to be alpha (“PRIV”) and Numeric. When you see “PRIV” as a filecode it simply means that the numeric value of the filecode is negative, and again this can include non-database file types.
Ernie Newton and Sam Knight reply:
If it is a VT or Telnet session, try NSCONTROL KILLSESS=#Snnnn
What is the maximum sized LUN that MPE 7.5 will recognize?
Guy Paul replies:
You should be able to have up to a 146 GB LDEV. Trial and error over the years has taught me to put no more than 70Gb/FWSCSI on a busy system. If you have Hyper-Volume extension, I would suggest slicing the mechs up a little smaller.
I have a couple of configuration questions about an N-4000. Does it make sense that an A6795A (PCI 4x 2Gb/s Single-port Fibre Channel Adapter) would be installed in PCI slots 1 or 2? The system's docs indicate that PCI slots 1 and 2 are 2x PCI slots; so the fibre channel would be limited to 1Gb/s. Does it make sense to have two Fiber Channel cards for a single VA7110?
Craig Lalley and Guy Paul reply:
The VA7110 does have two fiber connections, and both CAN be used. However, in order to be consistent with HP’s maintenance criteria, you should have one connected to a Command View workstation. Everything in Command View can be done through the serial port on the VA7100, except for logging. It is also a lot easier to define LUN’s graphically (Command View) as opposed to the command line (cryptic) language on the serial port.
Also on the VA7110, one of the fiber channels is “passive” and is for the command view workstation. I would not install a A6795A HBA into slots 1 or 2. Slots 3-12 are the twin-turbo (4x) slots you should use.