SUMMARY: Quantum Fireball 2.1GB SCSI

From: Hans Schaechl (
Date: Tue Jun 10 1997 - 05:51:28 CDT

Dear SM's,

thanks for all the replies you sent on my

>here I have a Quantum Fireball 2.1GB SCSI
>harddisk, aka TM-21S by Quantum.
>Is there any known incompatibility with Solaris
>2.5.1 drivers and SCSI-specs? Tagged command
>queueing and so?
>I want to run this drive in a SPARC-4-85MHz
>with Solaris 2.5.1 installed.

Most answers did point out that SUN itself
ships some entry-level systems with Quantum
Fireball SCSI-harddisks installed and so there
should be no problem at all.
Others told me of their Quantum harddrives which
all run perfect in different SPARCs under Solaris
But!!! I buyed two of the mentioned drives and
plugged them into two SPARC-5 systems running
Solaris 2.5.1. Boom! The SCSI-errors were manifold...
It turned out that this drive does _not_ support
the tagged-command-queuing feature of SCSI-2.

The only one whos answer was right (but came too late):
Alfredo Sola <>
> Yes -- Tagged command queuing. You will need to disable it by
>creating a /kernel/drv/esp.conf file that looks like this:
>name="esp" parent="/iommu@0,10000000/sbus@0,10001000/espdma@4,8400000"
> reg=0x4,0x8800000,0x40
> target5-scsi-options=0x778;

Hans Schaechl

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