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I/O Rack
Each I/O rack holds up to two I/O Drawers. Each I/O Drawer provides up to 14 PCI
adapters per drawer. The primary I/O Drawer (Drawer 0) reserves slots for support of
system media, service processor and hot-pluggable DASD bays resident in the drawer.
For information about PCI adapter slot placement, see PCI Adapter Placement
Reference , (SA38-0538). These slots are available in subsequent I/O Drawers 1
through 3 for any supported PCI adapter use. A fully configured system consisting of
four I/O Drawers (with a maximum of two I/O Drawers per I/O rack) and one System
Rack provides support for up to 55 33-Mhz PCI adapters, 48 hot-pluggable SCSI disk
bays and up to 8 media bays. The PCI bus supported is 33-Mhz with both 32 and 64-bit
adapters supported on a per-slot basis. Slots 1, 5, 9, 10 and 14 support either 32 or
64-bit PCI adapters. The remaining slots are 32-bits.
The Service Processor, resident in slot 8 of the primary I/O Drawer, provides extended
service support. The service processor provides facilities for system management, error
data collection, remote call-in, remote call-out including surveillance, and numerous
other features, including password support. The Input/output Rack is powered by 200 -
240 V ac.
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S80 and S85 User's Guide
10 EIA Unit I/O Drawer
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