Slow Bacxkup (NW5.1 SP5 with AS7+BAOF) 1

[tobyheywood]

Hi All,

Quick question, has anyone got any suggestions on how I can speed up the backup process?

I have 56GB being backup up to an Ultrium-1 LTO Drive which is supposed to have a throughput of around 100GB an hour. But, it is backing up nearer to 100MB an hour!

Any suggestion on how I may speed things up will greatly be appreciated. Toby Heywood

 

[ekmino]

Make sure that your NIC cards match your switch setting. If they are set to auto, try 100/full.

 

[tobyheywood]

Ekmino,

Thanks for your reply. Unfortunately I'm running ArcServe 7 on the server with the tape drive attached via ultra wide scsi, so NIC speed will have very little to do with it (unless I was getting some heavy usage from users, which I'm not!).

Thanks all the same.

Regards
Toby Heywood

 

[ArcserveFreek]

Hi,
1. Make sure you are using the driver "CANWPABD" in the asconfig.ini file
2. The following SET parameters would help you better

SET Minimum Packet Receive Buffers = 3 times the number of Netware licenses
SET Reserved Buffers Below 16 Meg = 300
SET Maximum Concurrent Disk Cache Writes = 1000
SET Dirty Disk Cache Delay Time = 0.5
SET Maximum Concurrent Directory Cache Writes = 300
SET Volume Low Warning Reset Threshold = 2048
SET Volume Low Warning Threshold = 2048
SET Days Untouched Before Compression = 30
SET Maximum Service Processes = 1000
SET New Service Process Wait Time = 0.3
SET Maximum Packet Receive Buffers = 4000
SET Maximum Directory Cache Buffers = 4000
SET Directory Cache Allocation Wait Time = 0.5
SET Minimum Directory Cache Buffers = 2000
SET Dirty Directory Cache Delay Time = 0.5 seconds
SET Directory Cache Allocation Wait Time = 0.5 seconds
SET Directory Cache Buffer Non Referenced Delay = 5 minutes
SET maximum number of internal directory handles = 900
SET maximum number of directory handles = 700

These settigns should go in the server's autoexec.ncf file and requires a reboot.

3. Disable Antivirus scanning in the "Global options" of Arcserve Manager.

Hope this helps!