[ale] 20/40 GB Tape backup

[Dow Hurst]

Chris,
Hardware compression in the drive is faster usually.  I have 120Gb and 
it takes about 8-10 hours to fill a 12/24Gb tape using hardware 
compression.  My drive is 12/24Gb DDS3 internal SCSI on an SGI Origin 
200.  It is dumping a single filesystem using xfsdump.  The limit is the 
tape write speed.  I am averaging, since we have lots of ASCII files 
mixed with some binary files, about 20Gb per tape.  So I am writing 
about 2.5Gb/hr at the fastest.
Dow


Christopher Fowler wrote:

>I'm backing up to <flamebait>/dev/rStp0</flamebait>.  I'm
>using 'cpio -ocvO /dev/rStp0'
>
>On Thu, Jul 31, 2003 at 08:06:15PM -0400, Robert L. Harris wrote:
>  
>
>>What device are you backing up to and what command are you using to kick
>>it off?
>>
>>
>>Thus spake Christopher Fowler (cfowler at outpostsentinel.com):
>>
>>    
>>
>>>I installed a SCSI-3 Compaq external 20/40GB tape drive.
>>>I'm trying to figure out shy it seems to take a long time
>>>to do a backup.  I have no prior experience with this type
>>>of drive so I was hoping ppl here would know best.  I'm backing up
>>>around 5GB now.  It takes a little more than 2 hours to do that
>>>backup.  So 20GB of data would take much longer.  Is this a realistic
>>>amount of time for a backup of this size?
>>>
>>>Thanks,
>>>Chris
>>>_______________________________________________
>>>Ale mailing list
>>>Ale at ale.org
>>>http://www.ale.org/mailman/listinfo/ale
>>>      
>>>
>>:wq!
>>---------------------------------------------------------------------------
>>Robert L. Harris                     | GPG Key ID: E344DA3B
>>                                         @ x-hkp://pgp.mit.edu 
>>DISCLAIMER:
>>      These are MY OPINIONS ALONE.  I speak for no-one else.
>>
>>Diagnosis: witzelsucht  	
>>
>>IPv6 = robert at ipv6.rdlg.net	http://ipv6.rdlg.net
>>IPv4 = robert at mail.rdlg.net	http://www.rdlg.net
>>    
>>
>
>
>_______________________________________________
>Ale mailing list
>Ale at ale.org
>http://www.ale.org/mailman/listinfo/ale
>
>  
>

-- 
__________________________________________________________
Dow Hurst                  Office: 770-499-3428
Systems Support Specialist    Fax: 770-423-6744
1000 Chastain Rd. Bldg. 12
Chemistry Department SC428  Email:   dhurst at kennesaw.edu
Kennesaw State University         Dow.Hurst at mindspring.com
Kennesaw, GA 30144
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