valid /etc/ddr.dbase entry for v5.1x (A and B-1)

[Sajith Abeyanayake]

The problem is slow to very slow backup performance using vdumps and
brbackup (SAP Br Tool) in the order of 1.5MB/s to 6.6MB/s as recorded by
collect.

What I need is a valid /etc/ddr.dbase entry for v5.1x (A and B-1).

Machine types affected: ES40, ES45, GS140, GS60, DS20.

Tape Library: MSL6060 (4x LTO 2)

HP Documentation states that the LTO 2 tape library is supported on Tru64,
but this is not the case as the current ddr entry states only Ultrium (LTO
1):
SAPXXX#> more /etc/ddr.dbase | grep Ultrium
# Matches "Ultrium"
Name = "HP" "Ultrium"
# Ultrium mode select parameters for rewind after reset behavior

The hwmgr listing states the device as "Ultrium 2-SCSI"
HWMGR Listing:
130:
path_port_id_6 = 6
path_target_id_6 = 2
path_lun_id_6 = 2
path_dev_i/o_cnt_6 = 0
path_state_6 = 1
path_new_state_6 = 0
path_xfer_6 = 0
path_wds_6 = 0
path_avserv_6 = 0
path_pxfer_6 = 0
path_avwait_6 = 0
registration_time = Wed Apr 28 16:17:03 2004
user_name = (null) (settable)
location = (null) (settable)
software_module = (null)
state = available
state_previous = unknown
state_change_time = none
event_count = 38
last_event_time = Thu May 13 14:51:20 2004
access_state = online
access_state_change_time = none
capabilities = 0
indicted = 0
indicted_probability = (null)
indicted_urgency = (null)
disabled = 0
name = SCSI-WWID:02000008:5006-0b00-001f-a734
category = tape
architecture = SCSI
phys_location = bus-6-targ-2-lun-2
dev_base_name = tape8
model = Ultrium 2-SCSI
firmware_rev = F43W
read_ops = 693920
write_ops = 10344046
read_bytes = 42634489856
write_bytes = 674650130432
current_density = 66
block_size = 0
records = 1
filemarks = 0
rewind_timo = 3600
space_timo = 3600
load_timo = 3600
space_eod_timo = 3600
resid = 0
sense_info = 0
sense_key = 6
soft_err = 0
hard_err = 0
active_paths = 1
standby_paths = 0
failed_paths = 0
donot_use_paths = 0
selected_bus = 6
selected_target = 2
selected_lun = 2
path_fail_limit = 1
subsys_dev_handle = 9
manufacturer = HP
consistent_name = 1
ccmn_specific_addr = 18446739676786513152
cluster_dev_directions = 0 (settable)
drvr_max_xfer = 16777215
SAPXXX #>

[Johan Brusche]

From your grep output on the ddr.dbase, I must conclude that the "DENSITY" sections are missing in your ddr.db /

I attached a complete LTO ddr.dbase section to this reply.
Remember to run the "ddr_config -c" after you inserted the missing pieces into ddr.dbase /

Rgds,
Johan.

[Ralf Puchner]

Have a look inside the documentation of your backup software (install section for Tru64).

The thread "tape on 5.1" 4-5 entries before contains a pointer to the documentation of netbackup explain in detail the necessary ddr entries.