Hidden Value details
commands and procedures in MPE that can improve your productivity
with HP 3000 systems. Send your tips to email@example.com.
Edited by John Burke
Is there any way
to delete pages from a spoolfile already sitting in OUT.HPSPOOL?
the SPOOK for native mode spooler.
How do I enable
DNS on my HP e3000? Ive poked around in NMMGR, but I
couldnt find anything obvious.
Gavin Scott and
Joshua Johnson reply:
is enabled by creating and adding the appropriate entries to the file
RESLVCNF.NET.SYS. You should also create a link file called
/etc/resolv.conf, if not already present. You can read all about it
in the manual Configuring and Managing MPE/iX Internet Services
(MPE/iX 7.5) at docs.hp.com/mpeix/pdf/32650-90906.pdf
and look for the section called Configuring the DNS
Resolver in chapter 8. There is absolutely nothing in NMMGR
that relates to DNS.
We have a 7980S
tape device that is not responding; that is, we put the tape in, but
it is not coming online. Im not sure if this is helpful, but I
also show that a user is logged into the system using the LDEV
assigned to the tape drive. SHOWDEV TAPE also does not list the
Gilles Schipper replies:
seen this before for DDS drives, but the same characteristics of this
problem probably apply to the 7980S as well. Probably during your
most recent reboot, there was a (possibly temporary) malfunction with
your tape drives power supply such that its existence was not
recognized during the boot up process. That would normally result in
a device unavailable condition and the subsequent
disabling of that logical device number. I have noticed instances
where that LDEV number is actually made available to the logon device
number pool (for subsequent assignment for logon session device
numbers). Long story short, the solution appears to be a power cycle,
START NORECOVERY reboot.
After shutting down
and powering off the CPU and all devices, run ODE to ensure all
devices are recognized before START NORECOVERY. Failure to recognize
the device at that point should lead to further investigation of the
power supply, SCSI device number setting, or other hardware
malfunction. If this situation happens frequently, I would first
suspect a problem with the power supply of that device.
[Ed. Note: I have seen
this situation occur several times with a 7980S. In all cases it was
because the 7980S had not completed its startup/diagnostics when the
3000 went looking for it. My advice has always been to make sure all
the peripherals are powered up and in a wait state before
power-cycling the HP 3000.]
Is there any
difference in performance between submitting two simultaneous backups
of two distinct sets of files on separate drives (using a 4 way
processor system) versus doing a store @.@.@;;storeset=(*T1),(*T2)?
Does an online backup cover everything such that I can do a reload
afterwards, or do I have to back up certain files without having
anyone on the system? Does doing a Store @.@.@ cover every possible
file for a backup?
Goetz Neumann replies:
first commandment when answering performance questions is it
depends, I can see no fundamental difference between the two
methods you describe. Assuming you are asking about a TurboStore
online backup, the question is do you use plain ;ONLINE
or ;ONLINE=START|END (aka TrueOnline)? TrueOnline will
backup files that are open for write-access at the sync point, the
default ;ONLINE will tell you which files it could not backup because
they were open for write access. Finally, doing a Store @.@.@ is
equivalent to STORE / . If you use user volumesets, I recommend to
also make sure all the volumesets directories get stored, i.e. add
user_set1, user_set2 to your backup options.
What is the
typical explanation for the situation on an HP 3000 where all the
sessions start to freeze up? Anyone trying to logon or run a
different program gets frozen. At first, I wondered if there was a
problem with the local network, but I froze up on the console typing
in a UDC command that happened to run a program. I rebooted the
computer, and that fixed the problem. Im just curious what the
problem was. The system is an A400 running MPE/iX 7.0.
Tom Emerson, Dane
Bodamer and Goetz Neumann suggest:
likely cause is a non-responding disk drive or possibly IO channel.
Niche causes include a full NBM file if running Netbase or someone
running SEGMENTER on SL.PUB.SYS.
scratching a bunch of old disks on a test machine, but am having
trouble with disks that were volume set Masters. Members scratch
easily because they come up as Loaners but that pesky Master is
always in invalid state for desired operation. The same
is true for Formatvol.
John Clogg replies:
(in most cases) is VSCLOSE. That should put the volume set in a LONER
We have a SE SCSI
connection with four tape drives hanging off of it. The device with
the first address on the chain has failed leaving others unusable.
How can we get the devices beyond the bad device working?
John Burke replies:
years I had a similar situation, only in my case there were actually
five tape drives hanging off a single SE SCSI. I had plenty of drives
fail, though I do not recall them ever affecting the operation of the
other drives. Anyway, we could always replace them (carefully) by
downing all the devices, powering them all off, unhooking the cables,
replacing the offending drive, powering them all back up, and,
finally, upping all the drives. The HP 3000 never hiccupped even
configuring a Seagate ST34573N disk drive on a 928RX with MPE/iX 5.5.
However, SYSGEN gives me a device not supported error
message. Should I use a different ID string? Or do I need some
patches to get ST34573N support on 5.5?
John Burke replies:
likely cause of this error is that ST34573N is not in
IODFAULT.PUB.SYS (it is for MPE/iX 6.5, but I do not have access to a
5.5 system to check). Assuming it is not in your IODFAULT (check
this), just use the ID for any SE SCSI disk. DSTAT will read the
actual device ID once configured. In this case size (or name) does
not matter. If ST34573N is in your IODFAULT (unlikely), then
something else is wrong and we need more information - like how did
you add the path, etc. [Ed. Note: Denis St-Amand and Emile Kwan Fong
both noted that support for ST34573N is in patch MPELXC3A.]
implemented a new backup job. It now wants a second tape. The old job
still requires one tape. The only differences are: The new job uses a
labeled tape; The new job uses the PROGRESS option; and the new job
redirects the STORE output to a file to be checked for errors. Would
one of these differences cause the backup now to span two tapes? We
are using only 125m DDS tapes on a DDS3 drive.
Guy Paul replies:
Odds are you
are switching tapes around the 65,501st file. This is a known issue
when using DDS plus labeled media. I believe this is fixed if you use
DLT and have patch MPELX94 or its supercede installed but
Im not sure on that point.
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