Supported environment, Hardware, Software – IBM DS8000 User Manual
Page 396: Logical volume sizes, Hardware software
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DS8000 Series: Concepts and Architecture
Supported environment
Not all hardware and software combinations for OS/400 support the DS8000. This section
describes the hardware and software pre-requisites for attaching the DS8000.
Hardware
The DS8000 is supported on all iSeries models which support Fibre Channel attachment for
external storage. Fibre Channel was supported on all model 8xx onwards. AS/400 models
7xx and prior only supported SCSI attachment for external storage, so they cannot support
the DS8000.
There are two Fibre Channel adapters for iSeries. Both support the DS8000:
2766 2 Gigabit Fibre Channel Disk Controller PCI
2787 2 Gigabit Fibre Channel Disk Controller PCI-X
Each adapter requires its own dedicated I/O processor.
The iSeries Storage Web page provides information about current hardware requirements,
including support for switches. This can be found at:
Software
The iSeries must be running V5R2 or V5R3 (i5/OS) of OS/400. In addition, at the time of
writing, the following PTFs are required:
V5R2
– MF33327, MF33301, MF33469, MF33302, SI14711 and SI14754
V5R3
– MF33328, MF33845, MF33437, MF33303, SI14690, SI14755 and SI14550
Prior to attaching the DS8000 to iSeries, you should check for the latest PTFs, which may
have superseded those shown here.
Logical volume sizes
OS/400 is supported on DS8000 as Fixed Block storage. Unlike other Open Systems using
FB architecture, OS/400 only supports specific volume sizes and these may not be an exact
number of extents. In general, these relate to the volume sizes available with internal devices,
although some larger sizes are now supported for external storage only. OS/400 volumes are
defined in decimal Gigabytes (10
9
bytes).
Table B-1 gives the number of extents required for different iSeries volume sizes.
Table B-1 OS/400 logical volume sizes
Model type
OS/400
Device
size (GB)
Number
of LBAs
Extents
Unusable
space
(GiB)
Usable
space%
Unprotected
Protected
2107-A01
2107-A81
8.5
16,777,216
8
0.00
100.00
2107-A02
2107-A82
17.5
34,275,328
17
0.66
96.14