How to understand the SLS backup running process

[Ian Miller.]

DENSITY has to match the drive defined in SYS$STARTUP:TAPESTART.COM
I use DENSITY:= COMP which results in /MEDIA=COMPACT being added to my backup commands.

REEL_SIZE is really relevant - leave it as 2400.

You need to find a copy of the SLS Documentation - there are several manuals. SLS is a strange and complicated product until you get used to it.

QUICKLOAD_RETRIES is number of retries.

The SAVESET_GEN is taking the first 15 characters of the disk name and adding .BCK

Remove the outer " then replace each "" by " and it may be clearer. Read the DCL manual on the fun with quotes as that line is just a DCL symbol assignment statement.

[Bradford Hamilton · Accepted solution]

thanks Hamilton
but i cannot find "SLS" in system manual, is there any special document for SLS?

You can find a copy of the manuals here (hosted on a VMS machine):

<>

Good luck!

[Davor_7]

Miller

another confused thing
in the BAK file here,
DENSITY = 0
QUALIFIER :== /BACKUP=COMPACTION

i think there's a conflict here...
what's your idea on it ?

[Davor_7]

Hamilton

the URL you give me is not listing the SLS document... maybe i have no idea to use it :)

[Ian Miller.]

I think there is not a conflict just two ways of getting the same result.

[Davor_7]

oh~ Miller
DENSITY = 0 (means no compact, right?)
QUALIFIER :== /BACKUP=COMPACTION (means having compact, right?)

why did you say no conflict on these two sentences?

[Bradford Hamilton]

Hi Davor,

The URL should bring you to a page that lists the three SLS manuals; the icons to the left of the names of the manuals are "clickable". There are PDF and Bookreader versions of each of those manuals. Just click on the icons to view them.

--Brad

[Ian Miller.]

The DENSITY symbol is used to match against drives defined in the triplets in TAPESTART.COM . It does not prevent enabling compaction on the drive (which is enabled by /MEDIA=COMP).

As I said SLS is a strange and confusing product at times and you need to spend some time with the manuals.

[Davor_7]

thanks Hamiton
i got the files..

but, do you have following guide? i cannot find them on HP website

Media and Device Management Services
for OpenVMS Guide to Operations

[Bradford Hamilton]

re: MDMS manual -

Google is your friend. I found this at a site in AU (warning - URL wrapped):

http://www.sysworks.com.au/disk$vaxdocsep961
/decw$book/d3zuaa42.decw$book

Good luck!

--Brad