IBM Support

Image Catalog and Virtual Media - Maximum Capacities and Limitations

Technote (troubleshooting)


Problem(Abstract)

This document describes the capacities and limitations of image catalogs, including virtual optical and virtual tape.

Resolving the problem

This document describes the capacities and limitations of image catalogs, including virtual optical and virtual tape.

V5R1 V5R2 V5R3 V5R4 V6R1 V7R1 V7R2 V7R3
Can be used to Upgrade Yes Yes Yes Yes Yes Yes Yes Yes
Can be used for PTF install No Yes Yes Yes Yes Yes Yes Yes
Create virtual optical image No No Yes Yes Yes Yes Yes Yes
Create virtual tape image No No No Yes Yes Yes Yes Yes
Maximum number of image catalogs
(see Note 1)
3 Unlimited
(see Note 1)
Unlimited
(see Note 1)
Unlimited
(see Note 1)
Unlimited
(see Note 1)
Unlimited
(see Note 1)
Unlimited
(see Note 1)
Unlimited
(see Note 1)
Maximum number of indexes (images) per catalog 64 64 256 256 256 256 256 256
Maximum number of virtual tape or virtual optical resources. N/A 1 35 35 35 35 35 35
Maximum number of virtual optical or tape devices varied on at same time N/A 1 35 35 35 35 100 100
Maximum size of optical image
(see Note 5)
N/A N/A 16 GB 16 GB 16 GB 16 GB 1 TB 1 TB
Minimum size of optical image N/A N/A 48 MB 48 MB 48 MB 48 MB 48 MB 48 MB
Default size of optical image N/A N/A 650 MB 650 MB 650 MB 650 MB 650 MB 650 MB
Maximum size of tape image N/A N/A N/A 1 TB (1000 GB) 1 TB (1000 GB) 1 TB (1000 GB) 1 TB (1000 GB) 1 TB (1000 GB)
Minimum size of tape image N/A N/A N/A 48 MB 48 MB 48 MB 48 MB 48 MB
Default size of tape image (see Note 2) N/A N/A N/A 1 GB (see Note 2) 1 GB (see Note 2) 1 GB (see Note 2) 1 GB (see Note 2) 1 GB (see Note 2)
Remote virtual optical No No No No Yes Yes Yes Yes
Remote virtual tape No No No No No No No No
Catalog Shadowing - virtual tape or virtual optical (see Note 3) No No No Yes Yes Yes Yes Yes
Import images during creation
(see Note 4)
No No No No Yes Yes Yes Yes

Notes:
1. Image catalogs can be used only when loaded on a virtual device. An image catalog can be loaded only on one virtual device at a time. Therefore, the useable limit is limited by the number of virtual devices varied on.
2. The default size is 1 GB; however, if the image is IMGSIZ(*MIN), the actual allocated size is the size of the data saved or minimum of 4KB. If there are no more volumes available and the backup spans to an additional volume, the volume is automatically created with a default size of 1 TB (1000 GB) and IMGSIZ(*MIN). The automatically created volume will be created with a Volume Name and Image File Name as GENxxx, where xxx is an incrementing number.
3. Catalog Shadowing is not supported by BRMS.
4. Import function requires the original QIMGCLG object to exist in the image catalog directory.
5. The 16 GB Maximum size of optical image in R710 and below is the maximum tested/supported size. It is possible to create an optical image that is greater than 16 GB at R710 and below.


Other information

Following are the supported file systems:

Root” (/) (see Notes)
QOpenSys
UDFS having a *TYPE2 default file format

Notes:
1. Does not support any other file systems; for example, /QNTC, /QDLS or /QFileSvr.400. If trying to use these file systems, may see errors like OPT1815 or CPD4F06. To resolve, create an image catalog associated with a directory off of the root file system.
2. A virtual optical device can access images located on a server using the Network File System (NFS). This is referenced as 'Remote virtual optical' in the above chart. Refer to the following links for more information:

Virtual optical storage using the Network File System (NFS):
https://www-01.ibm.com/support/knowledgecenter/ssw_ibm_i_72/rzam4/rzam4virtualopstoragenfs.htm

N1013479, PTFs: Utilizing Remote Virtual Image Catalog
N1010898, Upgrade Using NFS Remote Virtual Image Catalog

Commands and Functions That Are Not Supported
o SAVSTG is not supported.
o VFYTAP is not supported.
o DST and SST functions (such as session statistics) are not supported.
o Virtual tape library functions (Virtual Tape acts like a RACL - Random Access Automatic Cartridge Loader) are not supported.
o Restoring LIC or operating system is not supported at V5R2 and below.
o Restoring licensed programs from an image catalog in a user ASP or iASP is not supported.
o Catalog Shadowing is not supported by BRMS.


Cross reference information
Segment Product Component Platform Version Edition
Operating System IBM i 7.2
Operating System IBM i 7.1
Operating System IBM i 6.1
Operating System IBM i 7.3

Historical Number

441073175

Document information

More support for: IBM i
Save/Restore

Software version: 5.1.0, 5.2.0, 5.3.0, 5.3.5, 5.4.0, 5.4.5, 6.1, 6.1.0, 6.1.1, 7.1, 7.1.0, 7.2, 7.2.0, 7.3

Operating system(s): IBM i

Reference #: N1014533

Modified date: 27 September 2012


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