Friday Fine-tune: Adding disks and IP blocks
November 25, 2016
Is it possible to add a disk drive "on the fly" without doing a reload?
Jeff Kell replied:
You generally have to shut the system down to install and cable the disk to avoid electrical/interface problems. The usual approach is to use SYSGEN to configure the new device on the path where it will reside, keep the new configuration, shutdown the system, install the disk and do a START NORECOVERY.
Once the disk is recognized by the system, you can add it to your running configuration as follows (assuming the new drive will be LDEV 5 in the system volume set):
> newvol mpexl_system_volume_set:member5 5 90 90 (DISC,SPOOL)
[For details, see "Volume Management", HP Part No. 32650-90045 or "Performing System Management Tasks" HP Part No. 32650-90004.]
This will add the volume to the system volume set, but it also has some side effects. Since the new volume is "empty" and the disk space allocation routines attempt to "balance" loads across drives, all of your new files and transient space will be allocated on the new drive until it's capacity approaches that of the other volumes. This will create an I/O bottleneck on that drive, at least initially.
You could selectively :RESTORE certain accounts (or the whole system) to try and balance the allocation. You could also perform an INSTALL and a :RESTORE for better efficiency, but at the cost of a great deal of time. There are also certain third-party utilities that will balance disk utilization across members of a volume set. These utilities work online on a running system and don't require any downtime.
The network configuration of our HP 3000 was originally set up with one block of IP addresses. Now I need to add another block of addresses. Where do I add these in NMMGR?
You can add an IP address using NMMGR the following way:
- After typing NMMGR, select "Open Directory" .
- Then select "Update Dir."
- Now select the "Add" option (F5.)
- You are placed in a screen where you can enter the IP Address of the machine. The type is generally set to 1( IP).
- Now press the "Save Data" (F6) option, back out of NMMGR, and you are done.