Dell PowerEdge 6350 User Manual

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Contents

Dell PowerEdge 6350 User Manual Manual pdf 38 page image

3-6 Dell PowerEdge 6350 Systems User’s Guide%RRW'HYLFH2SWLRQVBoot Device Options allows you to specify the device from which to boot yoursystem:á Boot Target ID — This option specifies the SCSI ID of the device from which youboot your system. SCSI IDs are set for the hard-disk drive according to the drive’slocation on the backplane board for the SCSI ID of each drive location. The defaultfor Boot Target ID is 0.á Boot LUN Number — If your boot device has multiple logical unit numbers(LUNs) and Multiple LUN Support is enabled (see “Advanced Host AdapterSettings” found later in this section), this option allows you to specify a particularLUN from which to boot on your boot device. The default is 0.6&6,'HYLFH&RQILJXUDWLRQ6HWWLQJVSCSI Device/Configuration Settings allows you to configure certain parameters foreach device on the SCSI bus. To configure a specific device, you must know theSCSI ID assigned to that device. If you are not sure of the SCSI ID, see “SCSI DiskUtilities” found earlier in this section.á Initiate Sync Negotiation — This option determines whether the host adapterinitiates synchronous data transfer negotiation (sync negotiation) between itselfand the device. The default is Yes.Synch negotiation is a SCSI feature that allows the host adapter and its attachedSCSI devices to transfer data in synchronous mode. Synchronous data transfer isfaster than asynchronous data transfer.The host adapter always responds to sync negotiation if the SCSI device initiatesit. If neither the host adapter nor the SCSI device initiates sync negotiation, datais transferred asynchronously.Normally, you should leave Initiate Sync Negotiation enabled (a setting of Yes),because most SCSI devices support sync negotiation and because it allows forfaster data transfer.NOTE: Some older SCSI-1 devices do not support sync negotiation. This maycause your computer to operate erratically or hang if Initiate Sync Negotiationis set to Yes. Set Initiate Sync Negotiation to No for these devices.á Maximum Sync Transfer Rate (MB/sec) — This option sets the maximum syn-chronous data transfer rate that the host adapter supports. The host adaptersupports rates up to 80 megabytes per second (MB/sec). The default for theAdaptec AIC-7860 host adapter is 20; the default for the AIC-7890 and 2940U2Whost adapters is 80.If the host adapter is set so that it does not negotiate for synchronous data trans-fer, the maximum synchronous transfer rate is the maximum rate that the hostadapter accepts from the device during negotiation. (This is standard SCSIprotocol.)