Hi All,

I m encountering compression problem during backup.

Hardware used
2 x HP DC530 running W2K3 with R2 SP2
2 x Hp storeage works ultrium-3 scsi 1/8 autoloader.
2 x backup exec 12.5 with sp2

Server A
1 x HP DC530 running W2K3 with R2 SP2
1 x HP utlrium-3 autoloader 1/8
1 x Adaptec SCSI Card 19160 ultra160 SCSI
1 x Backup Exec 12.5 with SP2

All drivers, bios and firmware updated to latest for tape drive and scsi card.
Device setting for backup using backup exec driver ( recommended by Symantec)
Three types of backup running every month
Daily with differential - Hardware Compression ( if available otherwise none)
Weekly full - Hardware Compression ( if available otherwise none)
Monthly Full - Hardware Compression ( if available otherwise none)
Compression enable on autoloader

Backing up server B,C,D,E,F
Problem encounter

No compression for all Backup
Compression Rate reading 1:1

Used different compression type ( None, software, hardware if available otherwise software and hardware if available otherwise none )
Still no compression.

Server B
1 x HP DC530 running W2K3 with R2 SP2
1 x HP utlrium-3 autoloader 1/8
1 x LSI Logic ultra 320 SCSI
1 x Backup Exec 12.5 with SP2

All drivers, bios and firmware updated to latest for tape drive and scsi card.
Device setting for backup using backup exec driver ( recommended by Symantec)
Three types of backup running every month
Daily with differential - Hardware Compression ( if available otherwise none)
Weekly full - Hardware Compression ( if available otherwise none)
Monthly Full - Hardware Compression ( if available otherwise none)
Compression enable on autoloader

Backing up server B,C,D,E,F
Problem encounter

Daily backup
Compression Rate reading 1.9:1
Weekly and monthly no compression
Compression rate reading 1:1

Tried a few diag.

Using HP LTT
Compression enable for both hardware
Compression rate reading 2.6:1 while backup 1200mb file using HP LTT

Using backup Exec tracer
Compression enable for both hardware

Solution needed

Anyone has a solution or know what is causing this problem.
I went to the extend to even replace the autoloader which has no compression at all.
According to Symantec support - Backup exec does not do compression it just send backup job to the hardware. All compression date are done on the hardware.
So i m at a lost right now. both server are performing the same thing but only one shows some compression. Help needed