Hi

I have a Quantum Scalar i500 and it works in Bacula, but it is very slow. It 
writes at 22mb/sec. The drives should be able to do a lot more then that. I 
have to backup 11TB that takes a couple of days to complete, I don't want to 
think how long it would take to restore :(
This is the output I get from btape without hardware compression:

speed file_size=1GB nb_file=3
btape: btape.c:1056 Test with zero data, should give the maximum 
throughput.
btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 
64512 bytes.
++++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 63.16 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 71.58 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
70.03 MB/s

btape: btape.c:1068 Test with random data, should give the minimum 
throughput.
btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 
64512 bytes.
++++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
78.57 MB/s

btape: btape.c:1082 Test with zero data and bacula block structure.
btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 
64512 bytes.
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 56.51 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 53.69 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 53.69 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
54.60 MB/s

btape: btape.c:1094 Test with random data, should give the minimum 
throughput.
btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 
64512 bytes.
++++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 56.51 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 59.65 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive3" (/dev/Drive3)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 59.65 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
58.57 MB/s


and this is what I get with hradware compression:


speed file_size=1GB nb_file=3
btape: btape.c:1056 Test with zero data, should give the maximum 
throughput.
btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 
64512 bytes.
++++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 107.3 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 107.3 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 107.3 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
107.3 MB/s

btape: btape.c:1068 Test with random data, should give the minimum 
throughput.
btape: btape.c:905 Begin writing 3 files of 1.073 GB with raw blocks of 
64512 bytes.
++++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 76.70 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
78.57 MB/s

btape: btape.c:1082 Test with zero data and bacula block structure.
btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 
64512 bytes.
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 82.60 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
82.60 MB/s

btape: btape.c:1094 Test with random data, should give the minimum 
throughput.
btape: btape.c:960 Begin writing 3 files of 1.073 GB with blocks of 
64512 bytes.
++++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 53.69 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 56.51 MB/s
+++++++++++++++++++++++++++++++++
btape: btape.c:608 Wrote 1 EOF to "Drive0" (/dev/Drive0)
btape: btape.c:410 Volume bytes=1.073 GB. Write rate = 59.65 MB/s
btape: btape.c:384 Total Volume bytes=3.221 GB. Total Write rate = 
56.51 MB/s



I would have thought Bacula would do speeds similar to this. Please let me know 
if you need to see the config files. I do not have spooling on and I don't have 
software compression on.
If you can think of anything I can try, please let me know.


ekke85

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