StoreEdge D240 SCSI speed problem while running tape backup
Hello,
since I am running a D240 connected to my Fire V20z with a Quantum DLT VS80 Streamer I am suffering from SCSI speed problems.
The Fire V20z is running under Fedora Core 5.
The D240 is connected through an Adaptec AHA 29160 SCSI controller.
When I am running a tar cvf /dev/st0 /HTTP on the Fire (1st HD with 360MBps SCSI speed) it runs with a speed of 3GB / hour!
Without compression the speed should reach at least 10GB / hour or more.
As I have 2 DLT VS 80 running in the Media Trays of the D240 I tested both of them, it doesn't matter, both of them store with the same speed.
Can anybody give me a hint what to check / what to do, to get the speed up?
Thanks in advance, Axel
[742 byte] By [
AxDa] at [2007-11-26 10:16:14]
# 1
V20z and D240?
Adaptec 3rd party SCSI card?
DLT drives?
FC5 for an OS ?
How did you fit DLT drives inside the D240?
It's only qualified for DAT72 and DDS drives.
http://www.sun.com/storagetek/disk_systems/boot_disk/d240/specs.xml
... or is that some sort of external tape device that you have daisy-chained to the card?
The D240 peripheral has also not been qualified to function on a V20z.
(nor any of Sun's x86-based systems for that matter -- see that first link)
That SCSI card hasn't been qualified for proper functionality in the system, either.
http://sunsolve.sun.com/handbook_pub/Systems/SunFireV20z/components.html#SCSI
... nor that particular RedHat OS.
http://sunsolve.sun.com/handbook_pub/Systems/SunFireV20z/SunFireV20z.html
You do realize that the D240 is a LVD SCSI device.
Is the DLT drive(s) also LVD?
With such a lash-up of hardware and software, I'd say your getting about as good as you're going to get.
