Problems with restore of sysback
Customer is able to do a full system backup with out
problems, but on the verifiy or restore the restbyname
command prompts for a second tape.
This should never occurr since sysback puts the data to
tape using this method:
cat filelist | backbyname | sbwrite
The backbyname command should never know when it has hit end
of tape, that is a function of the sbwite command.
To restore sysback uses this method:
sbread | restbyname
Once again the restbyname should never know it has hit the
end of tape that is a function of the sbread command.
For a test I did this.
find /filesystem -print | backup -ivqf /dev/rmt0
After about 30mb into the backup it prompted for another tape.
The customer is able to use tar and cpio without problems.
I had the customer run a fsck in the filesystem (no errors where
found). This problem exist on 6 other systems as well. All
in the same filesystem. I had the customer run the command
against /dev/null and got the same results.
ls -l (in that directory)
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2cavx3.res ->
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2cdec.res ->
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2cdgd2.res ->
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2cdgd4.res ->
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2chft.res ->
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2chftc.res ->
lrwxrwxrwx 1 root sys 0 Apr 5 10:46 tk2chp.res ->
You can make this link like this.
ln -s "" file
We have a fix for this. It needs to be backported to
3.2.5. The problem does not exist at AIX 4.1
Fixed with APAR IX57585 (currently not released)
APAR= IX57585 BACKUP PROBLEM WITH 0 LENGTH SYMLINKS
The backup (byname) command will prompt for a
second tape if it encounters a symbolic link
of zero length. These links arent of much use,
but can still be created with: ln -s "" name
The customer will either need to remove those links or
use a different backup until the problem is fixed
Support Line: Problems with restore of sysback ITEM: BH3322L
Dated: April 1996 Category: N/A
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