Uninterruptable Power Supply (Ups); Disk Units; 6831 1.6 Gb Read Cache Device - IBM i series Handbook

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iSeries Model 250 Packages and AS/400e Server 250

6. Cryptographic card #4801 is allowed in high-speed slots E03, E08, or E09 (maximum one

7. Integrated Server refers to Integrated Netfinity Server, now available as the Integrated

xSeries Server for iSeries.

Uninterruptable Power Supply (UPS)

An external UPS is recommended since the 9406 Model 250 does not have an internal

battery backup unit (BBU). The configurator adds a country-specific UPS by default. The

9910 Models 080, 140, and 180 from the 9406 Model 170 may be used although the CPM

function is not supported.

There is a maximum of ten disk units supported on the Model 250. There is no support for an

external disk on the Model 250.

Read Cache Device feature #6831 (CCIN 6731) is a solid state disk device that provides the

Large Read Cache function required by high-performance disk unit controllers. There is a

maximum of one per #2748 PCI RAID Disk Unit Controller IOA. Extended Adaptive Cache

cannot be used with compression on the same #2748 PCI RAID Disk Unit Controller IOA. The

#2748 IOA is shipped with compression disabled. Compression is enabled by moving a jumper on

the IOA. Refer to "PCI Disk Units" on page 325 for detailed information.

The following table contains the maximum number of supported disk units for the Model 250.

For disk unit descriptions, refer to "PCI Disk Units" on page 325.

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