HP 3000 Manuals HP 3000 Manuals
Storing to Disk Files
Using TurboSTORE/iX 7x24 True-Online Backup (product number HPB5152AA),
you have the ability to store files to disk files. This feature allows
you to quickly back up filesets. It also allows you to create archive
files that maintain all MPE file attributes. Since the disk backup file
created is a flat, binary disk file, it can be moved to different
systems, or even different operating systems, and then RESTORE can be
used to extract the archived files. Disk files created by TurboSTORE can
only be created and restored on systems running MPE/iX 5.5 or later.
They cannot be restored on a pre-5.5 system.
File equations are used to tell TurboSTORE to store to a disk file.
Instead of setting up the store device file equation to reference a tape
device, set up the file equation to point to a disk file. For example:
:FILE MYBACKUP;DEV=DISC
or
:FILE MYBACKUP=FULLBACK.BACKUPS.SYS;DEV=DISC
When specifying the file equation, ;DEV=DISC MUST be specified in order
to Store to a disk file. The target of the file equation can point to
any MPE or HFS filename. Any other information specified in the file
equation will be ignored by TurboSTORE, so only the filename and DEV=DISC
should be used.
It is strongly recommended that you do NOT build the target disk file
before invoking STORE. TurboSTORE will create the target disk file as a
binary file, with a default record size of 256 bytes. The file will also
be created with the file code 2501. The file system mnemonic for this is
STORE. For example, here is a listing of a TurboSTORE disk backup file
created by STORE:
_____________________________________________________________________________
| |
| |
| :LISTFILE MYBACKUP,2 |
| |
| FILENAME CODE ------------LOGICAL RECORD----------- ----SPACE---- |
| SIZE TYP EOF LIMIT R/B SECTORS #X MX |
| |
| MYBACKUP STORE 128W FB 8736 16776959 1 10272 8 * |
| |
_____________________________________________________________________________
Although it is not recommended, you can create the target disk files
before starting the backup. Only normal, fixed, or undefined length
record files can be specified. STORE opens the file for user-mapped
write access, so any restrictions that apply for user-mapped access apply
for store disk files. Store will NOT change the file code of an existing
disk file, so if you want the file to have the proper file code, specify
it when you build the file.
If STORE fills up the first disk file specified for the backup, it
creates as many additional disk files as needed, or uses existing disk
files. They will be built with the same default file characteristics as
the first disk file. The naming convention used for additional files is
to append the reel number to the end of the first disk filename. The
resulting name will be an HFS-syntax name. For example, if STORE needed
three disk files to store all files, they would be named:
/SYS/MYBACKUP/STORDISC
/SYS/MYBACKUP/STORDISC.2
/SYS/MYBACKUP/STORDISC.3
When STORE moves on to another file, be sure enough disk space exists
before doing the backup.
NOTE The disk files can be restored by the MPE/iX 5.5 Limited Release
version of RESTORE or later. RESTORE cannot restore disk files on
pre-MPE/iX 5.5 systems.