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Chapter 3. Components overview
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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
1701-1RL
1701-1RS
1701-2RD
iSCSI RAID controller
1
1
2
Controller upgrade
No
Yes
N/A
Controller system memory
512MB max
512MB, 1GB max
512MB, 1GB max
RAID cache (per controller)
none
256MB
256MB
Battery backup for cache
No
Yes
Yes
Flashcopy copy services
4 volumes
256 Flashcopy target
logical drives with
1GB system memory
256 Flashcopy target
logical drives with
1GB system memory
Gbps Ethernet ports/controller
1
3
3
Power supply w/fan unit
1
2
2
Disk bays
7, 14 max
a
a. More than 7 hard disk drives require an optional power supply.
14
14
LED indicators
8
12
12
Summary of Contents for TotalStorage DS300
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