DL 380 G5 + 1/8 Autoloader Performance.

[P_Thrill]

Hi,
Just recently purchased the new DL 380 G5 with Hyper Threading attached to a 1/8 autoloader LTO3 running CommVault Galaxy v6; performance is ~32GB/hr.
Hardware:
DL 380 G5
4 x SAS 72GB drives (local)
P400 SCSI card with 512MB & Battery Cache
1/8 Autoloader LTO3

The LTO3 is rated at 80MB/sec (native) = 240GB/hr; theoretically!
I have the exact same setup (except for SAS disks) using DL 380 G4, I attain 112GB/hr.

Could it be the SAS disks holding me back? Any setting on the P400 card that needs to be enabled?

Appreciate any help!

Thanks.

[Steven Clementi]

Are yo attaching this autoloader to an Array Controller? The P400 is an array controlelr yes? ( i am NTO as familiar as I should be with the newer servers).

What is the the autoloader attached to on the DL380g4?



Steven

[P_Thrill]

The Autoloader was connected to the Smart Array 6i Controller on the G4; with local scsi disks.

HP specs their P400 scsi card to have 300MB/s per port and there are 2 ports on the card and both of them are connected to the SAS cage.

Note: as a test, I connected the G5 to my SAN (Drive C: and Drive D:[110GB]) and performed a backup - throughput attained was ~270GB/hr which is normal.

[Steven Clementi]

Ok. The first issue I see is that the 1/8 autoloader is NOT supported on an Array Controller. In order to make proper use of the changer, you need to attach the unit to a standard SCSI HBA.

Performing a backup over the SAN is not a good comparison since you are talking about 2 totally different medium's.

My only suggestion I can give is to get yourself a SCSI hba to connect the autoloader to.

What backup software are you using?


Steven

[P_Thrill]

I'm using CommVault Galaxy (not by choice).

I performed the SAN test to confirm/isolate where the possible problem may be located. This confirms that the bottle neck lies between the SAS disks and the P400. I'm also trying to get my hands on a P600 which also supports SAS drives.