We had a similar issue .... speed looked great, but then degraded.
Turned out the I/O on a disk was bad, even though the disk was not
reporting a failure on the client.

Once this disk was whipped out and replaced, the throughput actually
increased and remained stable.

Simon

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of
LemonRuski
Sent: Monday, April 12, 2010 9:27 PM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Backup starts off strong, then does not complete.


Veritas Netbackup 5.1 environment
Client = windows 2000 server
media server = unix
master server = unix

- Backup unable to complete (full or incremental)
- Starts of fine, tape gets mounted and writing starts.
- Write speed is very good at the start, as shown below (rmt/1).
- Backup progress goes from 0% -> 26% very quickly, with 273664KB (1500
files) written.

- I also noticed that when I kick start the backup, I see 6 bpbkar32.exe
and bpfix.exe process threads in the Windows Task Manager. Is this
normal?

                 extended device statistics
    r/s    w/s   kr/s   kw/s wait actv wsvc_t asvc_t  %w  %b device
    0.0    1.0    0.0    0.5  0.0  0.0    0.0    3.5   0   0 c1t0d0
    0.0    1.0    0.0    0.5  0.0  0.0    0.0    3.5   0   0 c1t0d0s3
    0.0    1.0    0.0    0.5  0.0  0.0    0.0    7.0   0   1 c1t1d0
    0.0    1.0    0.0    0.5  0.0  0.0    0.0    7.0   0   1 c1t1d0s3
    0.0   45.0    0.0 11519.9  0.0  0.1    0.0    1.5   0   7 rmt/1


- After that, I notice that after 3 hours, the completion rate is still
at 26%. No changes in the number of files written. 
- The write speed then just drops to about 11 kw/s.
- Finally the backup either ends with a code 54 or a 150.

Please advice. Thank you in advance.

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