IBM SG24-4576-00 manual Device Configuration

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￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ SCSI

Device

Configuration

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SCSI

Device

ID

#0

#1

#2

#3

#4

#5

#6

#7

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￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

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Initiate

Sync Negotiation

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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Max Sync

Transfer Rate

10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

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Enable disconnection

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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Initiate

Wide negotiation

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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￿￿￿￿ Options listed below have NO EFFECT if the BIOS is disabled ￿￿￿￿ ￿

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Send

start

init

command

No

No

No

No

No

No

No

No

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Include

in

BIOS

Scan

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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SCSI

Device

ID

#8

#9

#10

#11

#12

#13

#14

#15

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￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿

￿

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

init

command

No

No

No

No

No

No

No

No

￿

￿

Include

in

BIOS

Scan

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

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Figure

36.

PC Server 320 SCSI Select Utility Program - SCSI Device Configuration

To modify settings on this screen:

∙

∙

∙

∙

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 screen are described below.

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.

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.

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.

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.

80NetWare Integration Guide