Re: Access local drives for Dos 6.22

[Steve_Marfisi@3com.com]

Niki:

I do not think it is the 3Com MBA....we heavily test the use of Ghost in pre-OS
boot images (as does Symantec, as they have licensed our technology for use with
their Enterprise product)

I wonder if the device drivers are overwriting portions of memory consumed by
the ROM..MBA copies its code into memory where it is then executed. If you send
a zipped copy of your image file to this e-mail address, we can examine it for
you:

lantech_support@3com.com

Regards,
===========================
Steve Marfisi
Manager, Technical Services
Lanworks Technologies Co.
3Com Business Connectivity Group

Phone:  905 602-3232
E-mail:   steve_marfisi@3com.com
===========================





"Niki Rosenmayr" <n.rosenmayr@advance.at> on 12/20/2000 03:39:03 PM

Please respond to netboot@baghira.han.de

Sent by:  "Niki Rosenmayr" <n.rosenmayr@advance.at>


To:   netboot@baghira.han.de
cc:    (Steve Marfisi/US/3Com)
Subject:  Access local drives for Dos 6.22




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Hi,

I 'm sucessfully using netboot on a 3Com 3c905c to start MS-DOS 6.22.
All necessary drivers for the network card are being loaded.
Everything works quite fine, EXCEPT of the access of local drives and
CD-ROMS.

intended use
- ------------
The machine is heavily used for software-development and
software-testing. I am using the remote-booted DOS 6.22 operating
system to create an image of my hard-drives or to restore a
previously created image. This saves a lot of time recovering from
severe errors on the local operating-system, happening quite often
during the software-tests.


description of the problem
- ---------------------------
Booting the maching from the disk works very well - with all ASPI and
ATAPI drivers!! So I used this disk as the source for the disk-image
created with mknbi-dos and prepared with imggen (MBA-support). But
starting with that image makes the machine hang as soon as an ASPI or
ATAPI driver gets loaded.

If none of these drivers gets loaded the boot process ends
sucessfully and I am able to access network drives. But then I can
not access my CD-ROM drives  (one ATAPI and one SCSI on AIC-7890 U2W
adapter!).

I even can not access local IDE drives although they do not require
any driver.

Fortunately the program I use for creating the hard-disk images
(Symantec Ghost 1999) still can access the hard-drive partitions. So
it seems to me that programs accessing the local hard-drives directly
via BIOS (interrupt 13h) and not via MS-DOS are still working.


question
- --------
Why does the remotely booted MS-DOS 6.22 can't access local drives?
(Because of the MBA of 3Com 3c905C or because of netboot or
whatever?)
Is there a workaround?

I would really appreciate any suggestion! Enclosed is the used
config.sys for start-up of MS-DOS.


Regards,
   Niki

========================================
config.sys
========================================
DEVICE=himem.sys /testmem:off
DEVICE=EMM386.EXE NOEMS
buffers=20,0
files=60
dos=UMB
lastdrive=Z
FCBS=4,0
country=049,850,country.sys
dos=HIGH
stacks=9,256
;if activated hangs the machine - DEVICE=oakcdrom.sys /D:oemcd001
;if activated hangs the machine - DEVICEHIGH=aspi8u2.sys
;devicehigh=aspicd.sys /D:oemcd002
;DEVICEHIGH=ASPIDISK.SYS
DEVICE=IFSHLP.SYS
========================================


- - ------------------------------------------------
Nikolaus Rosenmayr, n.rosenmayr@advance.at
ICQ:   71968479

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