Re: Newbie with tapes

Repliying muself :)
Look at this lynk: 
http://home.t-online.de/home/Andreas.Steinmetz/unix/ddsutil.html  
This is the home page of and aplication called ddsutil, in it is 
explained the mean of the st0[alm] devices.

Pablo Giménez Pizarro wrote:

> 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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