Specifications
Escala Tower PL & S, E, T System Hardware
Chapter 3: External Storage and SAN Subsystems 34/116
9es3s1c3.doc
Rev 5.9
02/12/2003
3. DAS SCSI Subsystems (DAS 1000, 2000 and 3000 Series)
DAS3500 discontinued as of 30 June 1999.
DAS3200 discontinued as of 30 September 1999.
DAS1300 and DAS2900 discontinued as of 31 December 2000.
3.1. Highlights
The DAS 1000, 2000 and 3000 Series, are standalone SCSI-2 based disk array subsystems. The
DAS3500 uses SCSI disks but provides FC-AL fibre channel attachment to servers. The DAS 1000,
2000 and 3000 Series extend Bull's ESCALA disk offering with a scaleable, "worry free" storage
solution, for customers who need both high availability and high capacity for mission critical
applications.
The DAS 2000 and 3000 Series consist of model DAS2900 and DAS3200/DAS3500, near fault
tolerant storage subsystems with highly competitive performance and price. The DAS2x00 and
DAS3x00 are recommended for high availability software applications requiring large capacity disk
storage. The DAS2900 and DAS3200/DAS3500 models, based on Power PC technology provide 50%
more performance. The DAS 1000 Series consists of model DAS1300, a redundant subsystem
providing half of the DAS2900 maximum capacity.
The DAS3200/DAS3500 provide 50¨% more disk capacity than the DAS2900.
The
DAS1300, DAS2900
and
DAS3200/DAS3500
provide availability, and high performance with
caching options.
DAS1300 DAS2900 DAS3200/DAS3500
Disk modules 10 20 30
Embedded memory per SP
Cache and buffers
Yes (optional)
32, or 64 MB
Yes (optional)
32 or 64 MB
Yes (optional)
32 or 64 MB
RAID levels 0, 1, 3, 5, 1/0 0, 1, 3, 5, 1/0 0, 1, 3, 5, 1/0
Global spare Yes Yes Yes
HW Redundancy Yes Yes (near fault tolerant) Yes (near fault tolerant)
Major features of the 1000, 2000 and 3000 Series models include:
•
High availability design
•
RAID technology based storage subsystems
•
Write cache memory for high performance needs
•
Scalable host connectivity with the Fibre Channel connectivity on DAS3500
•
Scaleable storage subsystems (capacity and performance)
•
Small footprint
•
Low cost of ownership