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тАО05-28-2009 02:59 AM
тАО05-28-2009 02:59 AM
Hp Autoloader 1/8 920 slow backup
The server is a HP ML storage server with scsi LSI Adapter, Ultra320 SCSI 200 Series.
The problem is the following; I just installed data protector in windows 2003 r2 server, when I go to Data Protector devices the software detects the following device HP Ultrium 3-SCSI.
I create the backup job, but the backup is very slow, for example to backup 400Gb of data, It took 10 hours.
I appreciate any help, to solve this problem
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тАО05-28-2009 09:13 AM
тАО05-28-2009 09:13 AM
Re: Hp Autoloader 1/8 920 slow backup
Pablo Alvarado Siles
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тАО05-28-2009 10:27 AM
тАО05-28-2009 10:27 AM
Re: Hp Autoloader 1/8 920 slow backup
I don't know if the next information helps to discard some problems , but I would like to inform you that i made a test backup using data protector to a virtual library located in my local server and the result was the same, the backup was very slow ( my server is an ML 110 G5 Storage Server).
In the next reply I will send the drive support ticket
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тАО05-28-2009 10:32 AM
тАО05-28-2009 10:32 AM
Re: Hp Autoloader 1/8 920 slow backup
Thanks
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тАО05-28-2009 10:48 AM
тАО05-28-2009 10:48 AM
Re: Hp Autoloader 1/8 920 slow backup
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тАО05-28-2009 06:17 PM
тАО05-28-2009 06:17 PM
Re: Hp Autoloader 1/8 920 slow backup
Liberty breeds responsibility; Government breeds dependence
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тАО05-31-2009 03:22 AM
тАО05-31-2009 03:22 AM
Re: Hp Autoloader 1/8 920 slow backup
Scanning
Scanning
C:\ - Files Read: 28908
6343 MB read (28908 files) in 1765 seconds with rate 3 MB/sec
E:\ - Files Read: 1838357
397063 MB read (1838357 files) in 24899 seconds with rate 15 MB/sec
TOTAL: 403407 MB read (1867265 files) in 24899 seconds with rate 16 MB/sec
I am thinking in rebuilding my raid system to raid 10, since the system is now in raid 5, could this measure increase the disk performance, and the autoloader performance?
Thank you for the help,
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тАО06-02-2009 05:40 AM
тАО06-02-2009 05:40 AM
Re: Hp Autoloader 1/8 920 slow backup
The only one of the above that you can do anything about easily is fragmentation -- have you run a complete defrag on your disks at all recently?
Also note: at the speeds you're seeing, you're putting a lot of stress on your tape drive and the tape itself, with stop, rewind, restart very frequently as the data buffer empties over and over again... so you do need to find a way to fix this.
The problem of slow reads is one reason people use backup to disk and then copy the first backup to tape (D2D2T)-- the reads from the file system may be slow, but it gives you a huge file that is contiguous and at (or near) the top of the file system so it can be copied to tape quickly.
Data Protector Express supports backup to disk, and then copying those job(s) to tape. Products like HP's D2D Backup System also work well for this -- and can directly copy the backup from itself to physical tape without using any resources on the backup server ( http://www.hp.com/go/d2d )
Liberty breeds responsibility; Government breeds dependence