All operating system, application, and data storage in the Mt Xia
environment shall be configured external to the system. The purpose of
this is to increase the recoverability of the system, reduce hardware
related outages, and to centralize the management of storage.
All systems will have multiple hardware paths to the storage, those
paths may be physical or virtual.
Multiple volume groups shall be created in the AIX environment. The
operating system volume group, called "rootvg", will contain only
operating system related applications and files. The "rootvg" will
contain a minimum amount of storage.
The standard "rootvg" will contain a single 9 GB disk that exists on
the SAN and is mirrored by the SAN environment. Multiple paths to the
"rootvg" disk are configured using IBM's Multi-Path I/O (MPIO) device
driver. Optionally, the "rootvg" may have an "alt_disk" that exists on
internal storage. The "alt_disk" is used to perform Operating System
All non-operating system related programs and data will be stored in
volume groups other than "rootvg". The Volume group names will be
created in accordance with Mt Xia's VG naming
standards and will contain storage as required by the supported
All non-rootvg volume groups residing on Hitachi SAN based storage
will utilize the latest HDLM driver and multiple hardware paths to the
SAN. The HDLM driver is updated on a regular basis.
Further information regarding Mt Xia's storage standards can be obtained
from the following document: