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тАО09-27-2005 10:01 PM
тАО09-27-2005 10:01 PM
dlt vs 40/80on Linux
I've to backup up to 60 GB (almost text) on my DLT unit. I'm using Linux and st/mt driver/utility.
It works up to 40 GB, so it's clear that the hw compression is not working.
I think that the problem is the density code, the default is 0x40 (mt -f /var/st0 setdensity 0x40).
Any idea?
Does someone also knows how to speed up the backup operation? I'm using the onboard SCSI interface on a IBM X345 server.
Best regards - Gianni
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тАО09-30-2005 12:15 AM
тАО09-30-2005 12:15 AM
Re: dlt vs 40/80on Linux
DId you check your DLT, how to activate the HW compression ?
What's the DLT manufacturer ?
Rgds
Alexander M. Ermes
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тАО09-30-2005 02:18 AM
тАО09-30-2005 02:18 AM
Re: dlt vs 40/80on Linux
Thank you
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тАО10-05-2005 04:16 AM
тАО10-05-2005 04:16 AM
Re: dlt vs 40/80on Linux
I don't know why the compression was disabled (it should be enabled by default).
Again, I don't know why the option "compress" for the mt command does not work on my system.
However, using the option "defcompression", the compression works fine.
I could also speed up the process setting the block size for the tar command:
tar /dev/st0 file1 file2 file3 -b 128.
Best regards
g
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тАО10-05-2005 05:37 PM
тАО10-05-2005 05:37 PM
Re: dlt vs 40/80on Linux
;-)