Henry,

sorry for delayed answer (have been on a training and was unable to read
all mail on time).
As expected you did not changed the adapter (to handle larger blocks for
tape operations). Look at max_xfer_size parameter - it has to be changed
to 0x1000000 (one zero more, in decimal from 1 MB to 16 MB). This is NOT
described in any of TSM's manuals :-(( It can be found as Important note
on p.52 in redbook "Using TSM in SAN Environment" (SG24-6132-00), Chapter
3 "Building a SAN Environment", section "3.1.1. RS/6000".

Zlatko Krastev
IT Consultant






Henrry Aranda <harango AT HOTMAIL DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
29.01.2003 23:01
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Re: LTO 3583 Drive errors with TSM 5.1.5.2 on AIX 5.1


Zlatko
No, I did not changed any settings for the FC HBA. The output of
the AIX command "lsattr -El fcsN" are the following:

- For fcs0
bus_intr_lvl  20         Bus interruptlevel     False
intr_priority 3          Interrupt priority     False
bus_io_addr   0x2ec00    Bus I/O address        False
bus_mem_addr  0xc8020000 Bus memory address     False
lg_term_dma   0x200000   N/A                    True
max_xfer_size 0x100000   Maximum Transfer Size  True
num_cmd_elems 200        Maximum number of COMMANDS to queue to the
adapter
True
pref_alpa     0x1        Preferred AL_PA        True
sw_fc_class   2          FC Class for Fabric    True
init_link     al         INIT Link flags        True

- For fcs1
...
max_xfer_size 0x100000   Maximum Transfer Size  True
...