Amanda-Users

Re: tapetape (not in faq-o-matic)

2006-05-24 15:01:46
Subject: Re: tapetape (not in faq-o-matic)
From: Brian Cuttler <brian AT wadsworth DOT org>
To: Paul Bijnens <paul.bijnens AT xplanation DOT com>
Date: Wed, 24 May 2006 14:54:34 -0400
Paul,

The -e made a huge difference in runtime.

For what its worth, here is the result I received.

# date ; amtapetype -e 400g -f /dev/rmt/3n ; date

Wed May 24 09:23:58 EDT 2006

Writing 2048 Mbyte   compresseable data:  33 sec
Writing 2048 Mbyte uncompresseable data:  33 sec
Estimated time to write 2 * 409600 Mbyte: 912 sec = 0 h 15 min
wrote 12386304 32Kb blocks in 189 files in 6539 seconds (short write)
define tapetype unknown-tapetype {
    comment "just produced by tapetype prog (hardware compression off)"
    length 386048 mbytes
    filemark 0 kbytes
    speed 61853 kps
}

Wed May 24 13:01:08 EDT 2006

3 1/2 hours, the previous attempt ran overnight and was not where
near complete.

I really should run it again with HW compresson ON.






On Wed, May 24, 2006 at 10:15:03AM +0200, Paul Bijnens wrote:
> On 2006-05-23 22:22, Pavel Pragin wrote:
> >Brian Cuttler wrote:
> >
> >>Does anyone have the tape type for the LTO3 (Quantum) ?
> 
> >Try using this command to determine tapetype:
> >amtapetype -f /dev/nst0   (/dev/nst0) will be diff for solaris i think
> 
> When pointing people to this command, please don't forget that they
> should better add the "-e 400g" option too.
> 
> Without the -e option the runtime of this command is measured in days
> (maybe weeks for this kind of tapecapacity!!!) instead of 4-8 hours.
> 
> 
> -- 
> Paul Bijnens, xplanation Technology Services        Tel  +32 16 397.511
> Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM    Fax  +32 16 397.512
> http://www.xplanation.com/          email:  Paul.Bijnens AT xplanation DOT com
> ***********************************************************************
> * I think I've got the hang of it now:  exit, ^D, ^C, ^\, ^Z, ^Q, ^^, *
> * F6, quit, ZZ, :q, :q!, M-Z, ^X^C, logoff, logout, close, bye, /bye, *
> * stop, end, F3, ~., ^]c, +++ ATH, disconnect, halt,  abort,  hangup, *
> * PF4, F20, ^X^X, :D::D, KJOB, F14-f-e, F8-e,  kill -1 $$,  shutdown, *
> * init 0, kill -9 1, Alt-F4, Ctrl-Alt-Del, AltGr-NumLock, Stop-A, ... *
> * ...  "Are you sure?"  ...   YES   ...   Phew ...   I'm out          *
> ***********************************************************************
> 
---
   Brian R Cuttler                 brian.cuttler AT wadsworth DOT org
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