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SCSITIP.025
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Tech Tip
TECH TIP NO.: TTSCSI.025
PRODUCTS: Series 15 Fast Fisk EISA Caching SCSI Host Adapter
Series 44 Fast Disk EISA Caching SCSI Host Adapter
Series 441 Fast Disk-F EISA Caching SCSI Host Adapter
Series 48 Fast Disk NC SCSI Host Adapter
DATE: 3/24/93
ORIGINATOR: Don Burns
RELEASED BY: Documentation Control
SUBJECT: IOMEGA: BERNOULLI DUAL 44 and AMI SCSI controllers
Possible configurations for the IOMEGA (BERNOULLI DUAL 44) are as follows:
I. As the primary drives C:\ and D:\
A. If the Bernoulli box is the only drive or it has to be C:\,
the drive must be configured at TID 0. To access the second LUN on the drive,
one (and only one), of two conditions must be met:
1. Multiple LUN's support under DOS=>ENABLED, (Series 48
only)
2. Or the following IOMEGA drivers must be loaded in the
config.sys:
DEVICE=C:\{PATH}\DOSCFG.EXE /L001 /M1 /V
DEVICE=C:\{PATH}\DOSOAD.SYS /L001
Note: If the Series 441 is being used, the ECU
option "TARGET ALLOCATION FOR DOS SEQUENTIALLY FROM ID 0" can be DISABLED to
allow other TID's to be used. This option makes the lowest TID drive C:\).
B. For tape support, (using the ASPI interface), ASPIKERN.SYS
must be loaded.
*"7 drives under DOS" must be disabled when using ASPIKERN.SYS
**The IOMEGA drivers should be loaded as earlier noted.
***When more than two hard drives are going to be installed,
ASPIHDD.SYS should be loaded:
DEVICE=C:\{PATH}\ASPIKERN.SYS.
DEVICE=C:\{PATH}\DOSCFG.EXE /L001 /M1 /V
DEVICE=C:\{PATH}\DOSOAD.SYS /L001
DEVICE=C:\{PATH}\ASPIHDD.SYS
Continued on next page
TTSCSI.025, Continued
If ASPIHDD.SYS is loaded before DOSOAD.SYS, it will intercept
LUN 0, but not LUN 1 of the BERNOULLI DUAL. When DOSCFG.EXE is run, it will
find both LUN 0, and LUN 1. DOSOAD.SYS will then install both LUN's and assign
a second drive letter to the first LUN. This causes LUN 0 to be drives D: and
F:, and LUN 1 to be drive G:. Proper ordering of the drivers is important!
Interactive UNIX:
There is currently a problem with INTERACTIVE UNIX that prohibits the use of
multiple LUN devices. This is not a problem unique to AMI products, it also
occurs with the Adaptec, and BUSTEK SCSI controllers.
SCO UNIX:
When utilizing multiple LUN's under SCO UNIX, the "mkdev hd" and "mkdev fs"
utilities must be completed on a single LUN before using these utilities on
another LUN. The file system should be rebuilt after each of the "mkdev"
operations. The results of not following this procedure are erratic naming
conventions (i.e. what you named a LUN 1 partition might later be assigned to
LUN0), and the failure of building the second filesystem. This example is the
minimum of what might be encountered if the entire set of "mkdev" operations is
not completed on a single LUN before starting another!
Follow the steps below to avoid encountering this problem:
1: #mkdev hd
{Enter host adapter, id and LUN information}
{Choose to rebuild the kernel}
{Reboot the system}
2: #mkdev hd
{Enter the same information as above}
{configure the partitions, and name the device}
{Choose to rebuild the kernel}
{Reboot the system}
3: #mkdev fs
{Enter the same information as above}
{Enter the name of the directory that you want the device
mounted}
{Choose to rebuild the kernel once again}
{Reboot the system}
***Repeat steps 1-3 for the second LUN.
OS/2:
IBM has documented that the Adaptec drivers currently available will not
install LUN 1 of the Bernoulli dual.