[rhn-users] Backup problem using DLT Tape Drive in LINUX

[Espen Ekeroth]

Just to find out if it is the tape system that is the problem - run a tar 
with some GB's of files and measure the time.



/Espen

Phone: +47 69215581 / + 47 92499076
email: espen.ekeroth at omxgroup.com
MSN: espene at halden.net




"Trice, Jim" <jtrice at haastcm.com>
Sent by: rhn-users-bounces at redhat.com
20.06.2005 19:25
Please respond to Red Hat Network Users List
 
        To:     "Red Hat Network Users List" <rhn-users at redhat.com>
        cc: 
        Subject:        RE: [rhn-users] Backup problem using DLT Tape 
Drive in LINUX



Hi,
     If you are planning on using dump for your backups you should
reconsider. I may be a little out of date but linux dump was not 
recommended
the last time I looked. I would recommend using cpio or tar for simple
backups.
     I would try to determine if it is the disk access of tape access 
giving
problems. Have you tried backing up to /dev/null. You could also benchmark
your disk systems using something like iozone (google it). 
 
Jim T.
> -----Original Message-----
> From: rhn-users-bounces at redhat.com [mailto:rhn-users-bounces at redhat.com] 
On
Behalf Of Ramesh R
> Sent: Monday, June 20, 2005 1:59 AM
> To: rhn-users at redhat.com
> Subject: [rhn-users] Backup problem using DLT Tape Drive in LINUX
> 
> Hi,
>    Iam from India and we have installed Linux ES Verion 3 on DELL SERVER
> POWEREDGE 2850 series which has following configuration: Dual Processor
> with 4 GB RAM ad 4 * 72 GB SCSI Hard disk Drives With RAID 10
> technology. We have implemented Oracle Applications ERP . We have a
> peculiar problem for backing up  our data. We have connected DLT Tape
> Drive VS80 40/80GB ( Tandberg)  capacity with SCSI Adaptec Card. When we
> initiate backup command as follows:
>     dump of /dev/st0 /data/erpp where /dev/st0 denotes the device for
> tape drive and /data/erpp is the partition in which oracle apps has been
> installed. The timing for backing up 63GB data and files , it takes 18
> hours for completion. We had replaced the SCSI adaptec card , Tape Drive
> and cable but still it gives same timing.
> The same process we had tried from a desktop by applying latest SCSI
> drivers  and initiated the backup , it took 12 minutes for 2 GB of data.
> We had applied latest driver for Linux but still it shows the same
> timing. I need to know any other parameters needs to be configured under
> Linux. I need help more urgently as we are going online by next week.
> 
> Regards
> Rames.R
> 
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> rhn-users at redhat.com
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