Veritas-bu

[Veritas-bu] slow backup on LTO2 drives

2003-09-11 12:18:00
Subject: [Veritas-bu] slow backup on LTO2 drives
From: fzhang AT hsc.unt DOT edu (Frank Zhang)
Date: Thu, 11 Sep 2003 11:18:00 -0500 (CDT)
can somebody tell me how to unsubscirbe this mailing list ?
Thanks a lot.
Frank

On Thu, 11 Sep 2003 Fabien.LIOU AT fr.thalesgroup DOT com wrote:

> Hello,
> 
> 
> I've a STK L700 library with 4 LTO2 drives.
> My master NBU server is under Solaris8 (with latest kernel patch and LTO2
> patch)  with NBU4.5fp5
> 
> Interfaces between drives and master are 2gigabit.
> Switch is a sphereon 4500
> 
> 
> 
> My st.conf file is:
> 
> tape-config-list=
> 
>         "IBM     ULTRIUM-TD2",  "IBM Ultrium-2",
> "CLASS_LTO2",    
>         "IBM     ULT3580-TD2",  "IBM 3580 Ultrium-2",
> "CLASS_LTO2";    
>  
> 
> CLASS_LTO2      =       1,0x3B,0,0x45863d,2,0x40,0x42,1;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=0 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=1 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=2 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=3 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=4 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=5 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=6 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=7 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=8 lun=0;
> 
>  
> 
>  
> 
> name="st" class="scsi"
> 
>         target=9 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=10 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=11 lun=0;
> 
>  
> 
> name="st" class="scsi"
> 
>         target=12 lun=0;
> 
> name="st" parent="fp" target=0;
> 
> 
> 
> My sg.conf is:
> 
> # Configuration file for SCSA Generic.
> #
> name="sg" class="scsi" target=0 lun=0;
> name="sg" class="scsi" target=0 lun=1;
> name="sg" class="scsi" target=1 lun=0;
> name="sg" class="scsi" target=1 lun=1;
> name="sg" class="scsi" target=2 lun=0;
> name="sg" class="scsi" target=2 lun=1;
> name="sg" class="scsi" target=3 lun=0;
> name="sg" class="scsi" target=3 lun=1;
> name="sg" class="scsi" target=4 lun=0;
> name="sg" class="scsi" target=4 lun=1;
> name="sg" class="scsi" target=5 lun=0;
> name="sg" class="scsi" target=5 lun=1;
> name="sg" class="scsi" target=6 lun=0;
> name="sg" class="scsi" target=6 lun=1;
> name="sg" class="scsi" target=7 lun=0;
> name="sg" class="scsi" target=7 lun=1;
> name="sg" class="scsi" target=8 lun=0;
> name="sg" class="scsi" target=8 lun=1;
> name="sg" class="scsi" target=9 lun=0;
> name="sg" class="scsi" target=9 lun=1;
> name="sg" class="scsi" target=10 lun=0;
> name="sg" class="scsi" target=10 lun=1;
> name="sg" class="scsi" target=11 lun=0;
> name="sg" class="scsi" target=11 lun=1;
> name="sg" class="scsi" target=12 lun=0;
> name="sg" class="scsi" target=12 lun=1;
> 
> 
> When i do a "dd", performance seems to be ok (30Mo/s).
> But when i use NBU, i usually obtain 5Mo/s locally or remotely!!
> 
> 
> Does anyone can point me to the misconfiguration ?
> 
> 
> Thanks.
> 
> 
> Fabien 
> 
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