The IBM 7040 Model 61D I/O drawer provides PCI or PCI-X adapter slots and internal disk capabilities for use with pSeries servers such as the pSeries 690 (7040-681). The Model 61D is a 4U drawer which mounts in the 24-inch 7040-61R System Rack and connects to the system Central Electronics Complex via remote I/O cables.

Each model 61D I/O drawer provides 20 blind-swap PCI or PCI-X slots and 16 hot-swap disk bays. The Model 61D utilizes redundant power converters and power cabling to ensure high reliability and availability. It utilizes 350 V bulk power supplied from the 7040-61R system rack.

I/O Drawer -- (7040-61D)

The 7040-61D I/O drawer provides PCI or PCI-X adapter slots and internal disk capabilities for use with pSeries servers such as the pSeries 690 (7040-681). The Model 61D is a 4U drawer which mounts in the 24-inch 7040-61R System Rack and connects to the system Central Electronics Complex via remote I/O cables.

Each Model 61D I/O drawer provides twenty blind-swap PCI or PCI-X slots and sixteen hot-swap disk bays. The Model 61D utilizes redundant power converters and power cabling to ensure high reliability and availability. It utilizes 350 V bulk power supplied from the 7040-61R system rack.

7040-61D I/O Drawer Configuration and Limitations

• Each 7040-61D I/O drawer is divided into two separate halves. Each half contains ten blind-swap PCI or PCI-X slots and either one or two Ultra3 SCSI 4-pack back planes for a total of 20 PCI or PCI-X slots and 16 hot-swap disk bays per drawer. 7040-61D I/O drawers ordered with two 10-slot planars and only two #6564 Ultra3 SCSI 4-pack back planes will be configured with one backplane attached to the I/O planar in each half of the drawer.
• All ten PCI or PCI-X slots on each I/O drawer planar are capable of supporting either 64-bit or 32-bit PCI or PCI-X h #6563 planar provides seven 3.3V, 66 MHz, 64-bit PCI slots and three 5V, 32 MHz, 64-bit PCI slots. Each #6571 planar p CI-X slots capable of supporting 3.3V signaling PCI or PCI-X adapters operating at speeds up to 133 MHz.
• While it is not optimized, PCI (#6563) and PCI-X (#6571) planars may reside in the same 61D I/O drawer.
• The Model 61D utilizes blind-swap cartridges to provide easy removal and insertion of PCI adapters. The blind-swap cartridge slides into the rear of the I/O drawer and provides a cam-operated mechanism to insert or remove the adapter from the PCI slot. The use of the blind-swap carriers allows PCI adapters to be inserted or removed with the drawer in place without a requirement to move drawer to a service position.
• One single-wide PCI blind-swap cassette (equivalent to those in feature #4599) is provided in each PCI slot of the 7040-61D. Cassettes not containing a PCI or PCI-X adapter will be shipped with a "dummy" card installed to ensure proper environmental characteristics for the drawer. If additional single-wide blind-swap cassettes are needed, feature #4599 should be ordered.
• Most PCI and PCI-X adapters utilized in the Model 61D drawer can be hot-plugged and do not require the system to be powered down for removal or replacement. Certain adapters such as those controlling the system boot device should not be hot-plugged.
• Configuration limitations have been established to help ensure appropriate bus loading, adapter addressing, and system and adapter functional characteristics when ordering I/O drawers. These limitations are shown in the feature descriptions section for the individual PCI and PCI-X adapters.
• Maximum limits for adapters may not provide optimal system performance. These limits are given for connectivity and functionality assurance.
• Each I/O drawer planar incorporates two Ultra3 SCSI adapters for direct attachment of the two 4-pack hot swap backplanes in that half of the drawer. These adapters do not support external SCSI device attachments.
• The Model 61D is powered separately from the redundant bulk power assemblies in the 7040-61R System Rack. Each half of the I/O drawer incorporates redundant power converters and cabling to ensure high reliability and availability.

I/O Drawer Attachment:

• 7040-61D I/O drawers are connected to the CEC via RIO (Remote I/O) or RIO-2 loops. I/O drawer connections are always s to help protect against a single point-of-failure resulting from an open, missing, or disconnected cable. Systems with configurations could experience degraded performance and serviceability.
• RIO loop connections operate at 500 MHz.
• RIO-2 loop connections operate at 1 GHz.
• PCI I/O planars (#6563) provide a RIO type cable connector for system attachment.
• PCI-X I/O planars (#6571) provide a RIO-2 type cable connector for system attachment.
• 7040-61D I/O drawers may connect to the CEC in either single-loop or dual-loop mode. Dual-loop mode is recommended, as it provides the maximum bandwidth between the I/O drawer and the CEC.
• Single-loop mode connects an entire I/O drawer to the CEC with one RIO or RIO-2 loop (2 ports). The two I/O planars drawers are connected together via a short RIO or RIO-2 cable. Single-loop connection requires one loop (2 ports on the CEC drawer).
• Dual-loop mode connects each I/O planar in the drawer to the CEC separately. Each I/O planar is connected to the CEC e loops. Dual-loop connection requires two loops (4 ports on the CEC) per I/O drawer.
• Various lengths of RIO, RIO-2, and RIO-to-RIO-2 cables are available for I/O drawer connection and connection of two in an I/O drawer. See the appropriate CEC sales manual for additional information regarding I/O drawer cabling.