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This soft copy for use by IBM employees only.
┌──────────────────── SCSI Device Configuration ──────────────────────┐
│ │
│ SCSI Device ID #0 #1 #2 #3 #4 #5 #6 #7 │
│ ───────────────────────────────────────────────────────────────────── │
│ Initiate Sync Negotiation 1 Yes Yes Yes Yes Yes Yes Yes Yes │
│ Max Sync Transfer Rate 2 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 │
│ Enable disconnection 3 Yes Yes Yes Yes Yes Yes Yes Yes │
│ Initiate Wide negotiation 4 Yes Yes Yes Yes Yes Yes Yes Yes │
│ ──── Options listed below have NO EFFECT if the BIOS is disabled ──── │
│ Send start unit command 5 No No No No No No No No │
│ Include in BIOS Scan 6 Yes Yes Yes Yes Yes Yes Yes Yes │
│ │
│ SCSI Device ID #8 #9 #10 #11 #12 #13 #14 #15 │
│ ───────────────────────────────────────────────────────────────────── │
│ Initiate Sync Negotiation Yes Yes Yes Yes Yes Yes Yes Yes │
│ Max Sync Transfer Rate 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 │
│ Enable disconnection Yes Yes Yes Yes Yes Yes Yes Yes │
│ Initiate Wide negotiation Yes Yes Yes Yes Yes Yes Yes Yes │
│ ──── Options listed below have NO EFFECT if the BIOS is disabled ──── │
│ Send start unit command No No No No No No No No │
│ Include in BIOS Scan Yes Yes Yes Yes Yes Yes Yes Yes │
│ │
└───────────────────────────────────────────────────────────────────────┘
Figure 9. PC Server 320 SCSISelect Utility Program - SCSI Device Configuration
To modify settings on this panel:
•
Use the arrow keys to select the parameter to modify.
•
Press Enter to edit the value.
•
Use the arrow keys to select the new value or press Esc to quit.
•
Press Enter to validate the new value.
The fields in this panel are described below:
1 Initiate Sync Negotiation
The host adapter always responds to synchronous negotiation if the SCSI
device initiates it. However, when this field is set to Yes, the host adapter
will initiate synchronous negotiation with the SCSI device.
Some older SCSI-1 devices do not support synchronous negotiation. Set
Initiate Sync Negotiation for these devices to avoid malfunction.
2 Maximum Sync Transfer Rate
The default value is 10.0 MBps for SCSI-II Fast devices. If you are using
SCSI-II Fast/Wide devices, the effective maximum transfer rate is 20.0 MBps.
Older SCSI-1 devices do not support fast data transfer rates. If the transfer
rate is set too high, this may cause your server to operate erratically or
even hang. Select 5.0 Mbps for any SCSI-I devices.
3 Enable Disconnection
This option determines whether the host adapter allows a SCSI device to
disconnect from the SCSI bus (also known as the Disconnect/Reconnect
function).
You should leave the option set to Yes if two or more SCSI devices are
connected to optimize bus performance. If only one SCSI device is
connected, set Enable Disconnection to No to achieve better performance.
4 Send Start Unit Command
Enabling this option reduces the load on your server′s power supply by
allowing the SCSI devices to power-up one at a time when you boot the
server. Otherwise, the devices all power-up at the same time.
Chapter 2. Hardware Configuration 15