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Backup Exec 11D - Disk to Disk Slower than Disk to Tape

Posted on 2008-06-15
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Last Modified: 2011-10-19
Have a Dell PowerEdge 1800 Backup Server
PowerVault 124T LTO-2 Tape Drive
(5) - 250GB SATA I in RAID 5
Backup Exec 11D

When I backup to tape, it is much faster 900MB/Min for a particular job
When I backup to disk, it only goes 212MB/Min for the same job

The only difference is one is going to Tape and one to Disk. Everything else is the same.

Windows 2003 R2 Standard
Backup Exec 11D 7170 SP2
Remote Agent Latest
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Question by:katredrum
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Expert Comment

by:bhanukir7
ID: 21793421
Hi

can you attach one additional hard disk locally with out raid and check the backup throughput to the disk.

What is the controller to which the disks are connected. Can you check it has the latest drivers.

The possible issue might the contoroller or issues with the harddisk.

So adding additional disk and running backups to it would give you the right direction.

Normally backup to disk runs faster than to a tape drive.

bhanu
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by:katredrum
ID: 21848677
I narrowed it down to being the hard drives. I created a copy job from Backup Exec 11d and only changed the destination to disk instead of tape. What gets me is that my tape backup to tape takes 1 hour for a particular job and 8 hours to disk for the same backup job.

I will check the controller drivers as you suggested. Will keep you posted.
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by:katredrum
ID: 21852437
Updated the firmware on the controller and updated the driver to the latest and still no improvements.

Is my disks not capable of handling more?
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Best Practices: Disaster Recovery Testing

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by:katredrum
ID: 21968723
Since I didn't have another internal disk to test, I used Maxtor USB drive. At first it began with the same backup speeds, but when it finished I was surprised to see that it reached close to tape backup speeds.

Tape 900+ MB/Min
USB Disk 660 MB/Min

I'm going to update the BIOS. Read something bout that.
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Accepted Solution

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bhanukir7 earned 500 total points
ID: 21968930
Hi,

did you upgrade the Dell Array firmware/drivers also. The possible issue might be with the Dell controller connected to the SATA drives.

if you can connect a disk with out RAID and see the throughput that would give you a better understanding. A throughput of 660 to USB is still not a good amount of throughput.

bhanu
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Author Comment

by:katredrum
ID: 21969298
Here it he list of SCSI controllers I have.
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by:katredrum
ID: 21969303
Below
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by:katredrum
ID: 21969309
Here is the Version of the CERC SATA 1.5

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by:katredrum
ID: 21969314
Here is the version of the LSI Logic 1020/1030.

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