Poor Backup Speeds to Thecus NAS

[Adrian_M]

Hi,

We are doing a backup to disk (NAS) and then to tape using Backup Exec 2010 R2.

The NAS is a Thecus 8800PRO NAS with 8 x Western Digital 24x7 raid drives in a RAID 5 config. I created the RAID with the XFS file system and 512kb stripe.

We have then allocated all the space to an iSCSI target to connect to the backup server. On the server we then use iSCSI Initiaitor to connect the drive, allocate the drive letter, format to NTFS with 512kb allocation.

While running Crystal Disk Mark on the backup server gives a sequential read of 72MB/s and write of 80MB/s, 512k reads @ 28MB/s and writes @ 71MB/s.

Running a backup exec job the write speed is lucky to hit 20mb/s.

Anything we should know on how to increase the performance of these?

Regards,

Adrian

[Simon_B_]

To eliminate as many variabled from the equation as possible: Create a larger file (<10GB) on the Backup Exec Server (command line: fsutil file createnew help) and perform a backup of this to the B2D storage. What throughput is achieved?

[pkh]

Having RAID 5 will slow things down.  Also, your source disk may be badly fragmented or contains a lot of small files.

[Adrian_M]

Hi,

Doing the test gives a result of 4,334 MB/m backup which is about 72MB/s which matches the CrystalMark results.

Backing up from disk to tape or directly to tape from the same servers will give an average of 2000MB/m.

Regards,

Adrian