Dell PowerEdge systems 6300, User Manual

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3-26 Dell PowerEdge 6300 Systems User’s Guide
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load [
pathname
] nwaspi.cdm
NOTE: If nwaspi.cdm does not work, unload it and load it again. The first load ini-
tializes the host adapter; unloading and reloading allows the initialization to
complete.
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load [
pathname
] cdrom.nlm
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QDPHRIWKH&'WKDWDSSHDUV
cd device list
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cd mount [
number
] [
name
]
The CD-ROM is now ready to be accessed as a volume.
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The Adaptec 78 xx SCSI bus master firmware increases the SCSI performance of the
Adaptec 78 xx series host adapters under multitasking environments. The firmware
uses a paging mechanism to handle up to 255 simultaneous SCSI commands. The
sequencer can simultaneously manage up to 32 tagged, or 2 nontagged, SCSI com-
mands for each SCSI device, up to a limit of 255 SCSI commands. The firmware can
queue as many commands as the operating system is able to send to the host
adapter. To set this feature, enter the following command:
max_tags=
n
In general, a low number for the max_tags option gives better sequential perfor-
mance. This value varies with the level of random disk accesses and drive
characteristics.
NOTE: A large value for max_tags can cause starvation problems with some drives.
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Any error that occurs while the driver is initializing prevents it from loading. If an error
does occur, the driver causes the system to beep and then display a numbered error
message:
xxx message
The
xxx indicates the error code, and message is a descriptive line describing the
error. The error codes are divided into three categories:
‡
000-099 — Non–host-adapter specific
‡
100-299 — Host-adapter specific
‡
300-999 — Reserved