Re: Boot from USB PRM (Partitioned Removable Media ) failed after loading OS2LVM.DMD error: "OS/2 is unable to operate


Hello Mike,

thanks for your comments and report of your usage of the USB boot and USB storage devices.

At lot of useful information!!

Let see if I a do understand it -:)



Mike Luther schrieb:

Maybe this is the place and time to comment ..

Certainly, the knowledge is stored and accessible/researchable by google.

So no bits of value information and experience got lost. -:)

I'm not sure this is what you want, not exactly anyway. But in at least one case you can boot at least the R40, R51 and T43P Thinkpads here from USB Floppy Diskette devices. I do that all the time now for a specific reason. Then, using Jan's DFSEE at least version 7.1.5, I can clone the entire Thinkpad to a commonly available USB 2.0 Hard Disk unit. That does require a specific LVM rediscover command prior to working with the USB device so that you can access it to do this. Using the technique, I can also reverse the process and clone the entire USB 2.0 disk back into a Thinkpad as well. Or as needed, I can transfer data to or from a working Thinkpad to the USB 2.0 device for archival and recovery. But if I want to get and instantly working rebuilt or built Thinkpad from this clone whole drive issue from DFSEE, it has to be done from a floppy diskette boot run unless one wants to boot to a command line for the rebuilt or built unit and do a complete CHKDSK on every partition post construction.

So - you have a Thinkpad with attached USB Floppy Drive and an USB External HDD ( formated as PRM Partitioned Removable Media and accessed via Basdev=USBMSD.add )

You have OS/2 Start/Maintenance Diskettes with modification for booting from USB Floppy by USB Bios support of the ThinkPad.

Main goal: boot a "stand alone system" to backup/restore the primary HHD ( without OS activites on the source disk - the source disk is treated as read only )

That does work to produce a complete working unit if you want to go through the clone process that way. But since you are going to use the floppy diskettes to build the unit, as I see it, why not just use the floppy boot for the creation process as well?

No, I do not " use floppy diskettes to build the unit"

1. I just have built a mini maintenance system on my HDD ( via Bootable 4.3.2 )

2. Copy the system on an USB PRM primary partition
2.1 format the PRM
2.2 xcopy HDD to PRM drive with hotserv parm

2.3 sysinstx c: ( the drive letter of my USB PRM device - my HDD configuration start with drive letter F: )

3. Change the bios startup to boot form the USB Mass Storage Device


and try to boot it.


And as another vector toward this whole toolset, I've not also tried booting to an OS/2 command line using the <ALT F1> way of using DFSEE to produce this backup operation. But with LVM rediscover that might also work.


I have tested it.

The config.sys used to boot at F3 - boot to command prompt - does not include the USB driver on my system.

If you use a config.sys with a USB support - it is not a stand alone system - the HDD is not "read only" used

This is discussed in the yahoo dfsee support forum in thread "Go to a bigger HDD by clone disk"




Thus you can use the DFSEE toolset to clone from a completely functioning Thinkpad here provided you want to go through the cleanup process on rebuild or build.

Now the next step. I've tried this and it works fine.


I can take the entire USB 2.0 Hard Disk unit with the cloned total Thinkpad drive in it. I can then go into the BIOS settings for either the R40, R51, or T43P units here. I can switch the positions of the boot devices in the BIOS setups so that the USB 2.0 device is in a proper position so that it is bootable. I can then completely boot the tested Thinkpads to the external plug in USB hard drive completely as if it was the internal boot hard drive.


This is exactly what I want to do!!!!! Boot am OS/2 System from USB HDD ( e.g. CF Card )

My approach only a to keep is simple - so I built a mint test system without WPS support -
the T23 only has USB 1.1 - very very slow for handling x MBs !!

So what do I miss - I use the current drivers - what is the relevant difference between our systems?



IBM cooperated late last year with I and Jan to enable this technique. But as far as I know other than what is already present in the latest IBM drivers for OS/2 available through Passport Advantage for MCP2, the only issues involved for the floppy diskette utility diskette boot run are careful selection of what is in the floppy diskette CONFIG.SYS, what is not, and the order of things in it. That as well as being sure that the correct and needed drivers are on those floppy diskettes for the job.

Thus, to me, at least using the commonly available removable media floppy diskette USB drive units can be used this way. And this 'qualifies' as two ways to use USB removable media to boot OS/2.


I have not tested the creation of 2.88 MB extended density floppy disks out of the available tools to do this and tried any of the several different USB floppy drive units to see if a single such disk could be created to boot to OS/2 this way. If these USB floppy units will recognize the larger diskette, I sure suspect you could do this as with none of the bulky SCSI drivers and so on needed for the IDE drives in the Thinkpads, it would sure look like there would be enough room on the extended diskette to pull this one off. I've got all the third party utilities to try this, but at the moment I'm covered up with other stuff and can't take time to investigate it.


If this will help, then I can post the entire CONFIG.SYS for the required floppy diskette boot. I can also post the required driver content for the disks and thus the level of the build needed to accomplish this. But as I read this thread, I think this is more of a thrust toward using a plug-in USB stick device to boot OS/2. And I've not gone at all toward that concurrent with what all else I'm swamped with to do at the moment.


An USB stick device ( e.g. a CF Card ) formated as PMR is the same as an external USB HDD - both are handled by USBMSD.ADD as removables ??
or does handle USBMSD an USB HDD as fixed device ?

Is this the "rosetta stone" to the problem :-)

Mike,

Can you publish ??

1. Your config.sys from the USN Starter Diskette -

Just to document a working example for the description "How to Boot from USB Diskette" in the usbbasic.txt file from the USB Basic Driver Package

2. the disk layout of your cloned system - which you boot from the USB HDD

As a first step to find out why my CF Card System does not boot :-)




I will try to reproduce you configuration by doing a test with a "real fixed HDD" at the USB port of my T23.


Looking forward your reply

kind regards

Rainer


.

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