sorry, no I hadn't disabled compression. Today I installed mt-st and following
the wiki I ran:
mt -f /dev/sg2 compression 0
mt -f /dev/sg2 defcompression 0
but when I now run amtapetype it still tells me:
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73376008.2580645 bytes/sec
Wrote fixed (compressible) data at 101095833.6 bytes/sec
Compression: enabled
how can I make sure hardware compression is off?
On Apr 17, 2013, at 6:40 PM, Jean-Francois Malouin
<jean-francois.malo...@bic.mni.mcgill.ca> wrote:
> * Abilio Carvalho <abilio.carva...@bbp.ch> [20130417 10:19]:
>> Well, since noone answered, I had to run amtapetype, so here it is if anyone
>> else needs it:
>>
>> define tapetype LTO6 {
>> comment "Created by amtapetype; compression enabled"
>> length 2442818848 kbytes
>> filemark 1806 kbytes
>> speed 74006 kps
>> blocksize 32 kbytes
>> }
>
> Hmmm, speed look way off. Native speed is 160MBs for LTO6...
> Did you disable hardware compression before running amtapetype?
> Also, you might want to test with larger blocksize, for LTO5 I use 2MB
> with good results....
>
> hth,
> jf
>
>>
>>
>> On Apr 16, 2013, at 3:24 PM, Abilio Carvalho <abilio.carva...@bbp.ch> wrote:
>>
>>> Hi, just a quick question, does anyone have a tape type for an LTO6 drive?
>>> (Ideally an HP Ultrium 6 SCSI)
>>>
>>> Thanks
>>> Abilio
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