Re: Newbie with tapes

I'm going to try google -> st0a, i hope get any answers.
Another thing: in theory a DDS3 cartridge have a capacity up to 12 GB, 
without data compression.
What is exactly the compressed mode in tape devices??, if i type 'mt 
status', i get that the device have the compressed mode ON, i think that 
this compression is made by the hardware, but i'm not sure, because in 
the device specifications the capacity of the device is 24BG, using 
DDS3, so i think that is supossed that the device makes a data 
compression, that is software independent.
Any clues????
Thanks

Mr. James W. Laferriere wrote:

>	Hello Pablo ,  Both "man st" &
>	"more path-to-linux/drivers/scsi/README.st" have info .  But it
>	appears that neither have a description of the st0[alm] modifiers
>	except in (very) general terms .  Hth ,  JimL
>ps:	Try:  http://www.tldp.org/HOWTO/SCSI-2.4-HOWTO/
>
>On Wed, 21 May 2003, [ISO-8859-1] Pablo Giménez Pizarro wrote:
>
>  
>
>>Hi all, i'm newbie with tapes and i have some doubts.
>>I've to make backups of a file server for about 30 GB, i've decided to
>>use  a tape device, this is a SCSI Sony SDT-9000.
>>But i need some info about this devices:
>>-I've seen that there are different kinds of densities, the tapes i have
>>are DDS3, but the mt command doesn't have this density, the density is
>>hrdware or software depend??? if a type 'mt -f /dev/st0 status i get
>>that the density tha the device is using have code 0x25, but this code
>>is unknown for the mt command. This is correct???
>>-What kind of device i've to use, i've seen that there are st0, st0a,
>>st0l and st0m; and the respectives for the no-rewind devices: nst0X.
>>What's the diferences between these types of devices????
>>-How can i know the capacity of my tape???, and the free space in the
>>tape???, for compress and uncompress modes
>>
>>Thanks for all
>>
>>
>>    
>>
>
>  
>


-- 
-------
Un saludo

Pablo Giménez Pizarro
-------
La única lucha que se pierde es la que se abandona.
(Mujeres de la Plaza de Mayo)
-------
Albion 3.0 Project: www.albion30.net




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