AW: device class mount point mixed library (DLT7000 and SDLT320)

Hi,

> 1. SDLT volume mounted in SDLT drive and a bit later the move failed with the 
> warning ANR1145W (not enough mount points available). All drives and paths 
> were 
> online A 'query mount' didn't give any other mount requests.

the problem will be fixed in PTF level 5.2.2.0 with APAR IC37866.

best regards,
Kirsten

-----Ursprüngliche Nachricht-----
Von: Zlatko Krastev [mailto:acit AT ATTGLOBAL DOT NET] 
Gesendet: Samstag, 8. November 2003 17:27
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: device class mount point mixed library (DLT7000 and SDLT320)


I am afraid you might have an unsupported configuration. Looking to ITSM v5.2 
Administrator's Guide, Chapter 5 "Configuring Storage Devices", section "Mixing 
Device Types in Libraries": "While the Tivoli Storage Manager server now allows 
mixed device types in a library, the mixing of different generations of the 
same type of drive is still not supported. ... Mixing generations of the same 
type of drive and media technology is generally not supported in a Tivoli 
Storage Manager library. ... If you need to transition from an older generation 
to a newer generation of media technology, consider the following guidelines:
- Upgrade all drives in a library to the new generation of media technology."

For me the problem is that both "def dev" statements are using same 
devtype=dlt!!! Thus the server does not distinguish between drives. If you look 
in the example, it is not with DLT+SDLT but with DLT+LTO, and difference is 
made by devtype parameter of the drives.

--> IBM said that the mixed drives are supported in the same library.

But not all mixtures are supported. So either you or IBM had to check will be 
your configuration supported or not! Hope I am wrong.

Zlatko Krastev
IT Consultant






Kurt Beyers <kurt.beyers AT PANDORA DOT BE>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> 06.11.2003 
20:54 Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        device class mount point mixed library (DLT7000 and 
SDLT320)


Hello,

I've posted a question a few weeks ago about DLT7000 drives and SDLT320 drives 
in the same library (Storagetek L180). IBM said that the mixed drives are 
supported in the same library. The TSM server is 5.2.1.2 on Windows2000.

I've defined today the library as follows:

define library mixlib libtype=scsi
define path server01 mixlib srctype=server desttype=library device=lb3.0.0.0

define drive mixlib dlt_mt4
define drive mixlib sdlt_mt5
define path server01 dlt_mt4 srctype=server desttype=drive library=mixlib 
device=mt4.0.0.0 define path server01 sdlt_mt5 srctype=server desttype=drive 
library=mixlib device=mt5.0.0.0 define devclass dlt_class devtype=dlt 
format=dlt35c library=mixlib define devclass sdlt_class devtype=dlt 
format=sdlt320c library=mixlib define stgpool dlt_pool dlt_class maxscratch=20 
(was already defined of
course)
define stgpool sdlt_pool sdlt_class maxscratch=20


The first serie of tests went fine: labelling of SDLT tapes
                                               backup of the TSM database to a 
DLT7000 tape

I started then the migration from the primary DLT volumes to the SDLT primary 
pool. This confuses me from time to time. The following sitations
happened:

1. SDLT volume mounted in SDLT drive and a bit later the move failed with the 
warning ANR1145W (not enough mount points available). All drives and paths were 
online A 'query mount' didn't give any other mount requests.

2. SDLT volume mounted in SDLT drive, DLT tape in the other SDLT drive and the 
'move data'  is successfull.

3. SDLT volume in SDLT drive and DLT tape in DLT7000 drive (that is what I 
would expect). The'move data' is successfull.

If a new 'move data'  is started, you typically see the message 'waiting for a 
mount point in device class sdlt_class or dlt_class. But how does TSM knows 
which drive belongs to which device class? Where is this link defined (through 
the format:dlt35c / sdlt320c in the device class?)? Can you check which drives 
belongs to a specific device class according to TSM?

And why is a DLT tape mounted in a SDLT drive if the DLT drive is ready to be 
used as well?

Any input that will make this more clear to me how TSM chooses a drive is more 
then welcome. Thanks in advance,

Kurt