regarding tape backup

[Ian Miller.]

load new tape and BACKUP will notice and discover the tape label is not what it is expecting (parhaps because its a new tape with no label). You respond OVERWRITE to the request from BACKUP and on it goes - works for me.

Remember that BACKUP adds some overhead so the amount of data to be written to tape is more than the number of blocks in use. Also the figure of 320 assumes 2:1 compression which does not necessarily happen.

[Jan van den Ende]

Ni[un,

at the risk of stating the obvious:
_HOW_ do you tell BACKUP that it may use the next tape?

The question for some action comes as a REQUEST with a number; answer it with
$ REPLY /TO= "OVEWRWRITE"

It has always worked for us..

hth

Proost.

Have one on me.

jpe

[Jan van den Ende]

Nipun,

at the risk of stating the obvious:
_HOW_ do you tell BACKUP that it may use the next tape?

The question for some action comes as a REQUEST with a number; answer it with
$ REPLY /TO= "OVERWRITE"

It has always worked for us..

hth

Proost.

Have one on me.

jpe

[Petr Spisek]

Hi,
I think that the answer "NEW" could help too (as NEW_TAPE - second, not first).
You can prepare a second tape before this backup too (with the same label). And you'll happy with continue of backup.
Petr

[Wim Van den Wyngaert]

If you use a tape with backup /rewind the initialization depends on :
1) new tapes : as selected on the drive
2) used tapes : as selected by the previous drive that used the tape.

So a tape used on a tz88 is used as a tz88 whatever the drive until it's initialized with INIT/DENS=DLT8000 (or whatever).

My advise : each tape used for your SDLT must be INIT with the highest density before any (re)usage.

BTW : do not forget /group=0/block=32|64K
BTW : I think compaction is enherited in the same way but can be overruled with /med=compact

Wim

[Antoniov.]

Hi,
if my memory is still good, /IGNORE=LABEL should overlay the label check. However this qualifier can be dangerous, because you could insert a wrong tape.
In my mind you can use REPLY/TO command whenever you need it.
Why you don't use /MEDIA=COMPACT qualifier to compress data?

Antonio
http://it.openvms.org