Hi Daniel!
The SAN Data Gateway uses High Voltage Differential SCSI interfaces by
default.
If your are using the default SCSI interfaces, your drives will probably be
also HVD drives. They perform considerably less then the Low Voltage
Differential drives.
The specs on the IBM pages (sustained data transfer rate 15MB/sec native)
are LVD transfer rates. You will never achieve this with HVD SCSI.
However, 2.5 MB/sec is very slow. What's the SAN Data Gateway's microcode
level?
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines