What an excellent answer, the library is partioned for sure. My question is: how do I know which media changer I should use for configuration on TSM Server?
tapeutil -f /dev/smc0 elementinfo Getting element information... Number of Robots .............. 2 First Robot Address ........... 1 Number of Slots ............... 879 First Slot Address ............ 1025 Number of Import/Exports ...... 30 First Import/Export Address ... 769 Number of Drives .............. 32 First Drive Address ........... 257 tapeutil -f /dev/smc1 elementinfo Getting element information... Number of Robots .............. 2 First Robot Address ........... 1 Number of Slots ............... 968 First Slot Address ............ 1904 Number of Import/Exports ...... 30 First Import/Export Address ... 769 Number of Drives .............. 16 First Drive Address ........... 289 On 5/12/05, Sung Y Lee <[EMAIL PROTECTED]> wrote: > Assuming that configured correctly, I can think of 2, maybe 3rd reasons why > you would see smc0 and smc1 from the OS. > > 1)3584 library is partitioned. > > One can check by issuing for AIX. > tapeutil -f /dev/smc0 elementinfo > tapeutil -f /dev/smc1 elementinfo > > If command returns same values, then smc0 and smc1 are pointing to the same > changer physically this one library > if command returns different values, then the library has been partitioned > > 2)3584 multi-path architecture without automatic control path failover > configured > > If you have two partitioned library then in TSM server you can define two > media changers or two libraries. > If you have only one partiioned library regardless of multi or single path > architecture you can only define one media changer or one library. > > 3)SAN Zoning > > > > Will TSM automatically use the second Media Changer? > > > Yes, assuming you have 3584 with multi-path architechure, if configured > correctly, the TSM will automatically use the second media changer. > There are many configuration, right version of TSM server which need to be > taken care of before automatic failover will work. > > Here's a link to a very good redbook titled Implementing IBM tape in UNIX > Systems that describes multi path/libraries/setup for automatic > failover/SAN zoning. > > http://www.redbooks.ibm.com/abstracts/sg246502.html?Open > > Sung Y. Lee > > "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> wrote on 05/12/2005 > 10:52:27 AM: > > > I just checked one of TSM Server, it has 2 Media Changer: > > > > smc0 Available 0D-08-02 IBM 3584 Library Medium Changer (FCP) > > smc1 Available 0H-08-02 IBM 3584 Library Medium Changer (FCP) > > > > From TSM Server, it only defines one Media Changer: > > DEFINE PATH TSMSERVER LTO3584 SRCTYPE=SERVER DESTTYPE=LIBRARY > > DEVICE=/dev/smc1 ONLINE=YES > > > > My question is: > > If only define 1 Media Changer, TSM Server can't use the second Media > > Changer, then why does it need 2 Media Changer? If it define the > > second Media Changer as following: > > > > DEFINE PATH TSMSERVER LTO3584 SRCTYPE=SERVER DESTTYPE=LIBRARY > > DEVICE=/dev/smc0 ONLINE=YES > > > > Will TSM automatically use the second Media Changer? > > > > TIA >
