For IBM SSA RAID Cluster Adapter see > Installation and User's Guide
Before start repair actions - verify
See TIP > NF 5500 and NF 5500-M10 Use of SSA Adapter
See TIP > STOP SSA Event Logger before HOST Software installation
See TIP > SSA RAID Adapter restricted to RAID 5 with OVER 2GB of RAM
See TIP > Failover issues: SSA Cluster Adapter and Host SW 1.06, 1.07
If the system cannot work with the PCI-SSA adapter,
check the following:
See > IBM SSA RAID (Cluster) Adapter Installation and User's Guide
FRU P/N OPT P/N MFG P/N
----------------------------------------------------------------
IBM PCI SSA-RAID Adapter 32H3811 32H3811
----------------------------------------------------------------
IBM SSA-RAID Cluster Adapter 02L7644 96H9835 96H9848
- " - Memory (SIMM 16MB) 76H5657 89H5651
---- 3527 SSA-Options -------------------------------
1.0 m SSA external cable pair 59H7220
2.5 m SSA external cable pair 59H7221
5.0 m SSA external cable pair 59H7222
10.0 m SSA external cable pair 59H7223
25.0 m SSA external cable pair 59H7224
SSA Dummy Disk Drive Module 05J6411
-----------------------------------------------------
Two external SSA-cables are packaged with each P/N.
This allows the SSA loop to be implemented.
The 3527 can support a max. of five SSA hot-swap disk drives. If less
than five disk drives are used, SSA dummy disk drive modules must be
inserted into the empty bays to maintain continuity of the SSA loop.
SSA RAID Adapter Supported Servers
A:\ISSACFG
Then press Enter.
Please see the LEGAL - Trademark notice.
Server
Max. Number
of
Adapters
Supported BIOS-Level
Required
PC Server 320
PCI/MCA 1
19A
PC Server 320
PCI/EISA 1
M54PE-16T3B
PC Server 325
3
All
PC Server 330
3
All
PC Server 520
PCI/MCA 1
19A
PC Server 520
PCI/EISA 1
M54PE-16T3C
PC Server 720
2
11
PC Server 704
3
7
(Oct-1997) Current there is no support for PC Server 310 and 315
See > SSA RAID Adapter restricted to RAID-5 with over 2GB of Memory
Note: The maximum number of adapter supported is based on how many
full-sized PCI adapters will physically fit in each server and what number have been
officially tested by IBM. Larger numbers than those listed may function correctly, but
may not be supported.
Introduction
The IBM SSA RAID Adapter is a PCI bus master adapter that serves as the interface between
systems using the Peripheral Component Interconnect (PCI) architecture and devices using the Serial Storage Architecture (SSA).
The adapter provides high performance implementation of RAID-0, RAID-1 and RAID-5. It can also provide storage
in a non-RAID configuration if required, for maximum storage space.
The greatest distance you can have with SCSI, from server to storage enclosure, is appr. 4.3 meters, when used in conjunction with a SCSI repeater card.
If a loop is broken, the two connectors continue to access the devices using the remaining connections as a string. When the faulty cable is replaced, the
loop will autom. reconnect. The server need not to be brought offline, as all SSA cables and disk drives are hot swappable.
Up to 24 external 3527 units can populate one loop (up to a maximum of 48 drives per loop) giving you a max. of 48 ext. 3527 units on one SSA adapter, using two loops, one on each
port of the adapter.
Due to disk technology, the current maximum for disk storage on a single SSA Adapter using 3527 units is appr. 432 GB.
The 7133 has three power and cooling supplies for redundancy. The 7133 can continue to operate if one fan or power supply fails, and it can be replaced while the 7133 is still operating.
It also has a fiber optic extender on particular models, allowing to have connectivity up to 2400 meters.
The SSA RAID Adapter supports the following operating systems:
Note 1 Device drivers for all these network operating systems (NOEs) are supplied with the adapter.
The configuration utility allows you to configure and administer the SSA configuration online from within
the operating system. There is also a DOS-based configuration that allows to configure SSA configurations offline.
(There is no DOS device driver available !)
To install the SSA RAID Configurator and Utilities on a system already running DOS, perform the following steps:
Summary
SAA is an open ANSI standard, X3T10.1. At the moment the maximum transfer rate is 80MBps (4-ports x 20MBps).
SSA Characteristics
Components on SSA loops are called nodes, a node can be either an Initiator or a Target.
An initiator issues commands, and targets respond with data and status.
The SSA nodes in the adapter are therefore initiators and the SSA nodes in the disk drives are targets.
Each SSA node is given a unique address (UID) at the time of its manufacture, which allows the initiators in the loop to
determine what other SSA nodes are attached to the loop.
The SSA architecture allows more than one initiator to be present in a loop. In that case, commands and data from multiple
initiators can be directed to the same or different targets and intermixed freely. Error recording in an SSA network is coordinated by one particular
initiator, known as the master initiator. This is the initiator with the highest UID. If a new initiator is added
to the network with a higher UID than those currently present, it takes over the master responsibilities for that network.
Similary, if a master initiator is removed from the SSA network, the initiator with the next higher UID takes over master responsibility.
This master handover occurs autom. w/o any user intervention.
The master initiator has two primary functions:
Asynchronous alerts are used to notify the master initiator asynchronously of high-severity errors or conditions.
The basic unit of data transferred between SSA nodes in a frame which contains 1 byte describing the frame type, 4 bytes of CRC, up to 6 bytes of addressing
and up to 128 bytes of data. The data block contains either an SSA message or the user data.
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