ANR8420E DEFINE PATH: An I/O error occured while accessing drive DRIVE01 on 3570 B11 Tape Library/Dr

[rons]

I'm trying to configure an IBM 3570 B11 library/drive and when I define the

path for the drive, I get an ANR8420E error. I'm new at this and a bit confused as to what is really necessary for a valid configuration and to complicate things more, I'm doing this on a production machine that has arcserve currently running as the backup product, and TSM is to replace it so I'm limited to what I can do during the week to test. I was writing this post when I decided to try something different, and it defined the path without an error, but I'm not able to test it until possibly the weekend.



Configuration

TSM 5.1.5.4

AIX 4.3.3 ML10

lsdev -Cc tape

rmt0 Available 40-60-00-0,0 IBM Magstar MP Tape Subsystem

rmt1 Available 20-60-00-4,0 5.0 GB 8mm Tape Drive

lsdev -Cc library

(nothing)

lscfg (there is no library defined)



The steps I have taken are as follows;



via smit

removed this tape drive - left it defined. (It is used as a standalone drive with arcserve normally - arcserve

has been shutdown before doing this.

TSM is being installed for the first

time as replacement for arcserve)

rmt0 Available 40-60-00-0,0 IBM Magstar MP Tape Subsystem



define this tape drive (via TSM Devices)

ADSM-SCSI-MT scsi Tivoli Storage Manager Tape Drive



define this library

ADSM-SCSI-LB scsi Tivoli Storage Manager Library



(I've also tried this defining the library first)

(There is not a library definition in the AIX O.S. configuration)



lsdev -Cc tape

rmt0 Defined 40-60-00-0,0 IBM Magstar MP Tape Subsystem

rmt1 Available 20-60-00-4,0 5.0 GB 8mm Tape Drive

lsdev -Cc library

lb0 Available 40-60-00-0,1 Tivoli Storage Manager Library



lscfg|grep mt0*

+ rmt0 40-60-00-0,0 IBM Magstar MP Tape Subsystem

* mt0 40-60-00-0,0 Tivoli Storage Manager Tape Drive





defined via dsmadmc command line



DEFINE LIBR l3570 libtype=scsi



DEFINE PATH delphi l3570 srct=serv destt=libr devi=/dev/lb0



DEFINE DRIVE l3570 drive01



DEFINE PATH delphi drive01 srct=serv destt=drive devi=/dev/mt0 libr=l3570



ANR8420E DEFINE PATH: An I/O error occurred while accessing drive DRIVE01.





Now, if I do NOT remove this tape drive via smit



rmt0 Available 40-60-00-0,0 IBM Magstar MP Tape Subsystem



And I do NOT define this tape drive (via TSM Devices)



ADSM-SCSI-MT scsi Tivoli Storage Manager Tape Drive



and then define the path with dsmadmc as;



DEFINE PATH delphi drive01 srct=serv destt=drive devi=/dev/rmt0 libr=l3570



Then the path is defined without an error.



Is this a proper configuration for this library and drive? Examples I've

seen seemed to indicate I need to define the drive and path as I do when it gets

the error.



I have no problems defining a manual library and defining the rmt1 8mm drive and all works fine.



I might add, I know the single drive is an issue, but we purchased TSM at the same time we were in the process of getting a new tape system with multiple drives. The budget went south and the hardware got cancelled for now, but I dislike arcserve so much, I want to get TSM working.



Thanks for any comments,



Ron

 

[Espelage]

Ron,



in one of my old cookbooks I found the following entry for defining a 3570 to TSM

------------------------------------

2. IBM 3570

- Do not define ADSM devices through SMIT.



- Single drive configuration requires:

* library must be in random mode

* define library will use device=/dev/rmt#.smc

* define drive will use device=/dev/rmt#

* define devclass DEVType=3570



- Dual drive configuration will require:

* library must be in base mode (as well as random) to use as a single

library with 2 drives

* def library will use /dev/rmt#.smc (use the rmt for the matches

element address 16, although either will work)

* def drive will require element numbers - 16 for the drive on the right

and 17 for the drive on the left.

or

* library must be in split mode (as well as random) to use as two

libraries with 1 drive apiece



* Atape driver at 3.1.0.6 or above is required.

* 3570 drive requires ADSM server code lvl 11 or above for Version 2.

-------------------------------------------------------------------------------------

So do not use SMIT for defining your 3570 and add yout DEF PATH statements to the above DEFINEs - then it should work.



Good luck



Gernot

 

[rons]

Thanks for the reply Gernot!



I had it figured out that this was the proper way to define

things but part of my confusion was that there was not a

rmt0.smc file getting created under /dev and so it would not

work this way. I noticed some other posts having problems

defining a library with other types of devices and other

platforms with version 5.1.5 so I upgraded to 5.1.6.5 and for

good measure upgraded atape from 7.0.7 to 8.2.1 and then things

worked as you describe. All is happy after putting it into

place over the weekend.



Ron