Large Systems - HP 9000 Manual

Large Systems

If your are running a system with a large number of file systems, note the
following possible problem areas:
1. On a large system such as a T500 with a very large number of disk
drives (such as 50 or more), you may see messages such as the
following, during the system analysis phase of cold install.
Out of inode- can't link or find disk
or
Write failed, file system is full.
or
File system full.
2. To reduce the likelihood of this problem occuring, before you do the
installation you should turn off any disks you don't plan to use for the
installation process and start over.
3. After the system is cold-installed, you may wish to add back all the
file systems that existed under the previous installation, either
manually or using SAM. However, for a large number of file systems
(for example, over a hundred), some tables in the kernel may be too
small to allow correct booting. This is because the newly-installed
kernel contains default values for kernel tables sizes, and does not
allow for special configurations made to the kernel installed
previously.
For example, the first boot after adding the file systems may result in
error messages displayed to the console, such as the following:
inode: table is full
proc: table is full
file: table is full
Additionally, the boot may fail in various ways. For example, you may
be have to do file system repair manually.
• If this is not possible, the kernel may need to be re-configured
before booting. The following settings should allow the kernel to be
booted, but may not be optimal for the system:
- ninode = 2048 (default is 476)
- nproc
- nfile
• Alternatively, you may wish to re-configure the kernel in one of the
following ways:
Chapter 6
= 1024 (default is 276)
= 2048 (default is 790)
Troubleshooting
Large Systems
137