I have Bacula 5.2.3 compiled on a RHEL 6 Server. I have IBM TS3200 Tape Library
with two tape drives: LTO5 FH. I looking to see how I can get the best
performance and speed up my backups
I checked with IBM and was told that my tape drives support a maximum block
size of 256k.
My understanding is the default block size in Bacula is 64k
When I do :
# tapeinfo -f /dev/sg0
Product Type: Tape Drive
Vendor ID: 'IBM '
Product ID: 'ULT3580-TD5 '
Revision: 'B5BF'
Attached Changer API: No
SerialNumber: '1068007095'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: 0x58
Density Code: 0x58
BlockSize: 0
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
Partition 0 Remaining Kbytes: -1
Partition 0 Size in Kbytes: -1
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 1
I added the min/max block size in the Bacula-sd.conf "Device" section:
Minimum Block Size = 262144
Maximum Block Size = 262144
This really did not make any difference the "tapeinfo -f /dev/sg0" still shows
the BlockSize:0 and MinBlock: 1/ MaxBlock: 16777215.
Has any ne out there done some Bacula tuning with the block size? I would
really appreciate some help on this.
Thank you.
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