Dell PowerEdge 2300 User's Guide - Page 57

aspicd.dsk, max_tags

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To use a CD-ROM drive with NetWare 4.11, follow these instructions: load [pathname]\aha2940.ham slot=x load [pathname]\aspicd.dsk NOTE: If aspicd.dsk does not work, unload it and load it again. The first load initializes the host adapter; unloading and reloading allows the initialization to complete. load [pathname]\cdrom.nlm cd device list cd mount [number] or cd mount [name] The CD-ROM is now ready to be accessed as a volume. The Adaptec 78xx SCSI bus master firmware increases the SCSI performance of the Adaptec 78xx 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 commands 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 performance. 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. Installing and Configuring SCSI Drivers 3-21

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Installing and Configuring SCSI Drivers
3-21
6HWWLQJ±8S±D±&’¹520±’ULYH±:LWK±1HW:DUH ·¸²²
To use a CD-ROM drive with NetWare 4.11, follow these instructions:
¶³
(QVXUH²WKDW²WKH²&’¹520²GULYHU²IRU²1HW:DUH²¼³¶¶²Ã
DKD³º»µ¶KDP
IJLV²
ORDGHG³²,I²QHFHVVDU\´²ORDG²WKH²GULYHU²E\²HQWHULQJ²WKH²IROORZLQJ²FRP¹
PDQG²OLQH±
load [
pathname
]\aha2940.ham slot=
x
·³
/RDG²
DVSLFG¶GVN
²E\²HQWHULQJ²WKH²IROORZLQJ²FRPPDQG²OLQH±
load [
pathname
]\aspicd.dsk
NOTE: If
aspicd.dsk
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.
¸³
/RDG²
FGURP¶QOP
²DV²IROORZV±
load [
pathname
]\cdrom.nlm
¼³
(QWHU²WKH²IROORZLQJ²OLQH²DW²WKH²SURPSW´²DQG²WKHQ²QRWH²WKH²QXPEHU²DQG²
QDPH²RI²WKH²&’²WKDW²DSSHDUV±
cd device list
µ³
(QWHU²WKH²QXPEHU²RU²YROXPH²QDPH²RI²WKH²&’²DW²WKH²FRPPDQG²OLQH±
cd mount [
number
]
or
cd mount [
name
]
The CD-ROM is now ready to be accessed as a volume.
2SWLPL]LQJ±3HUIRUPDQFH±
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.