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UTZ Absent Member.
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Check Compression DP 7.0

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Hello,

 

how can I check the hardware compression ratio.

 

DP:  7.0

Tape :  HP MSL 4048 

 

Thanks a  lot

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UTZ Absent Member.
Absent Member.

Re: Check Compression DP 7.0

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Ok, thats simple but time-consuming.

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André Beck
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Re: Check Compression DP 7.0

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Hi,

 

 how can I check the hardware compression ratio.

 

Pick a medium of type FULL (that is, one that was written until full), get the amount of data that made it to the medium from the Usage tab in the GUI, then divide by native capacity of the medium?

 

 Tape :  HP MSL 4048

 

That's not a tape drive technology, it's a library. Native capacities of media types compatible with drives typically found in a MSL 4048:

 

LTO3: 400GB

LTO4: 800GB

LTO5: 1500GB

LTO6: 2500GB

 

So for example, if your full LTO3 medium shows up with 771460MB, the compression ration of this particular data blob was approx 1.93:1.

 

HTH,

Andre.

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UTZ Absent Member.
Absent Member.

Re: Check Compression DP 7.0

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Ok, thats simple but time-consuming.

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jruffer Outstanding Contributor.
Outstanding Contributor.

Re: Check Compression DP 7.0

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You could script it using:

 

omnimm -media_info MEDIUM -detail

 

That will give you a Total blocks figure that you can use.

 

Jeremy

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