Using The Netware Tape Backup Utility; Setting Up A Cd-Rom Drive With Netware 3.12 Or 4.11 Smp; Optimizing Performance; Troubleshooting For Netware - Dell PowerEdge 4200 Series User Manual

Using the NetWare Tape Backup Utility

Included with NetWare is a server-based tape backup
utility called sbackup.nlm. This allows backup of server
disk drives to a server tape drive. The sbackup.nlm util-
ity supports Adaptec host adapters. Use the following
procedure to load the backup utility:
1. Load the SCSI adapter driver.
The syntax to load the aic7870.dsk driver is:
load [pathname] aic7870.dsk [options] slot=x
The ASPI layer (aspitran.dsk) is automatically
loaded.
2. Refer to the Novell NetWare documentation for
additional instructions on loading the server backup
software. Refer to the NetWare Server Backup User's
Guide to load the tsa and sbackup modules.
Setting Up a CD-ROM Drive With
NetWare 3.12 or 4.11 SMP
To use a CD-ROM drive with NetWare 3.12 or 4.11 SMP,
follow these instructions:
1. Load aic7870.dsk by entering the following com-
mand line:
load [pathname] aic7870.dsk slot=x
2. Load aspicd.dsk by entering the following com-
mand line:
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 initial-
ization to complete.
3. Load cdrom.nlm as follows:
load [pathname] cdrom.nlm
4. Enter the following line at the prompt, and then
note the number and name of the CD that
appears:
cd device list
5. Enter the number and volume name of the CD at
the command line:
cd mount [number] [name]
The CD-ROM is now ready to be accessed as a
volume.

Optimizing Performance

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 pag-
ing 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.

Troubleshooting for NetWare

Any error that occurs while the driver is initializing pre-
vents it from loading. If an error does occur, the driver
causes the computer 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
Specific error codes, such as those in the following sub-
sections, appear only if you have installed the host
adapters and drivers that generate them.
Installing and Configuring SCSI Drivers 3-19