Table 21. RAID capacities for High Performance Flash Enclosures Gen2 (continued)
Flash drive disk
size
Physical
capacity of
Flash drive
set
Rank type Effective capacity of one rank in number of extents
RAID-10 arrays RAID-5 arrays RAID-6 arrays
3 + 3 4 + 4 6 + P 7 + P 5 + P + Q 6 + P + Q
15.36 TB 246 TB FB Lg Ext n/a n/a n/a n/a 68980 82782
FB Sm Ext n/a n/a n/a n/a 4414735 5298103
CKD Lg Ext n/a n/a n/a n/a 77365 92846
CKD Sm Ext n/a n/a n/a n/a 4100392 4920882
I/O adapter features
You must select the I/O adapter features that you want for your storage system.
The I/O adapter features are separated into the following categories:
• I/O enclosures
• Host adapters
• Host adapters Fibre Channel cables
• zHyperLink adapter
• zHyperLink cables
• Transparent cloud tiering adapters
• Flash RAID adapters
I/O enclosures
I/O enclosures are required for your storage system conguration.
The I/O enclosures hold the I/O adapters and provide connectivity between the I/O adapters and the
storage processors. I/O enclosures are ordered and installed in pairs.
The I/O adapters in the I/O enclosures can be either device or host adapters. Each I/O enclosure pair can
support up to four device adapters (two pairs), and up to eight host adapters (not to exceed 32 host
adapter ports).
Feature codes for I/O enclosures
Use this feature code to order I/O enclosures for your storage system.
The I/O enclosure feature includes two I/O enclosures. This feature supports up to two device adapter
pairs, up to four host adapters with eight ports, and up to eight host adapters with four ports.
Table 22. Feature codes for I/O enclosures
Feature code Description
1303 I/O enclosure pair for PCIe group 3
60 IBM DS8900F: DS8900F Introduction and Planning Guide
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