IBM TotalStorage DS300 Best Practices Manual page 49

iSCSI adapters in the servers are used to communicate over an IP network to the
DS300 disc subsystem. An alternative to iSCSI hardware adapters in the servers
is to use iSCSI software initiators instead. These have the advantage of reduced
costs in the server. However, they have the disadvantage of less security and
increased server CPU utilization.
The IBM TotalStorage DS300 is available in 3 models as shown in Table 3-2.
Table 3-2 DS300 models
iSCSI RAID controller
Controller upgrade
Controller system memory
RAID cache (per controller)
Battery backup for cache
Flashcopy copy services
Gbps Ethernet ports/controller
Power supply w/fan unit
Disk bays
LED indicators
a. More than 7 hard disk drives require an optional power supply.
1701-1RL 1701-1RS
1
No
512MB max 512MB, 1GB max
none
No
4 volumes 256 Flashcopy target
logical drives with
1GB system memory
1
1
a
7, 14 max
8
1701-2RD
1
Yes N/A
512MB, 1GB max
256MB 256MB
Yes Yes
256 Flashcopy target
logical drives with
1GB system memory
3
2
14
12
Chapter 3. Components overview
2
3
2
14
12
31