G06.31 Software Installation and Upgrade Guide

G06.31 Installation and Fallback Alerts
G06.31 Software Installation and Upgrade Guide—544626-002
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OSS Files Greater Than 2 Gigabytes (Large Files)
For OSM and TSM coexistence and fallback issues, see the OSM Migration and
Configuration Guide .
OSS Files Greater Than 2 Gigabytes (Large Files)
Beginning in G06.29 RVU, OSS supports files larger than the previous 2-gigabyte limit
(OSS large files). The OSS file system and utilities are able to handle file sizes up to 1
terabyte.
To implement this capability, the OSS file system and utilities are modified to support
Format 2 files (previously, all files were created as Format 1). All large files are created
as Format 2; small files (less than 2 GB) can be created as either Format 1 or Format
2. Format 1 files are automatically converted to Format 2 when opened using the OSS
64-bit utilities or Enscribe.
The ability to access large files can lead to problems if you install the G06.29 or later
RVU, and then need to fall back to an pre-G06.29 RVU. Format 2 files are not
supported in pre-G06.29 RVUs. If your applications create new Format 2 files (large or
small), you cannot access those files on systems running RVUs earlier than G06.29.
DP2 Fallback SPR
A DP2 fallback SPR, T9053AQS, is available. This fallback SPR is preinstalled in
systems running G06.28; for those systems, no action is required. You can install the
SPR on systems running G06.24 through G06.27, as long as all prerequisites are
included:
•
If you are currently running the G06.23 RVU, consider upgrading to G06.28 before
upgrading to G06.31 to facilitate fallback if fallback becomes necessary.
•
If you are currently running a G06.24 through G06.27 RVU, HP strongly
recommends that you install the fallback SPR before migrating to G06.31. The
installation of T9053AQS requires a system load.
Falling back to G06.23 or earlier RVUs is not supported.
When the T9053AQS fallback SPR is installed:
•
Format 2 OSS files smaller than the 2 GB limit are converted to Format 1 when
opened, so that the files remain usable. The file size cannot exceed the Format 1
limit.
•
Format 2 OSS files larger than the 2 GB limit are no longer accessible through the
OSS file system and utilities, and DP2 returns an error for any operation other than
purging the files. However, you can access the files from the Guardian
environment by using Enscribe.
WARNING. If you do not install the DP2 fallback SPR before migrating to G06.29 and a
fallback becomes necessary, you must perform a system load on the prior RVU, and then,
before using any OSS files, you must install and coldload to the DP2 SPR.