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Agilent 54835A scope (4 channel 1GHz / 4Gs/s) repair & uphack

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Krzys:

--- Quote from: Mrt12 on June 27, 2019, 08:37:11 pm ---Hi,
I downloaded the 4 ISO images and burnt them on CDs. Botting from Disk 1 works fine and the recovery starts, but it cannot read CD 2. Did you have the same problem? how did you merge the Ghost image files?
--- End quote ---
No, since I used no CDs to do the restore.

AFAIR I moved the HDD to some laptop, then netbooted it via PXE to WinPE, mounted shared folder with extracted content of every ISO (all *.gho files in the same directory - I didn't merged them, just placed each file in the same directory), then I've used Ghost 8.0 for Windows to restore the image to HDD.

I couldn't have used my scope to do this, since (1) it got no CD drive and I didn't wanted to needlessly burn CD or DVD, and even if I wanted to burn a CD, there was no guarantee, that HP/Agilent/Keysight blessed restore CD set would restore anything on my - totally unsupported - scope (without proper interface boards, as it turned out); (2) my scope didn't wanted to boot from network, Intel Pro 100 with (otherwise) working bootrom flashed just hung the system and realtek 8139-based card with etherboot loaded from the diskette didn't wanted to talk with my network, (3) even if I succeed in PXE booting the scope, I would have somewhat limited possibilities (I have two WinPE's in my network, one XP-based that runs off the network and got somewhat broken TCP/IP stack - it would work, but I wouldn't be able to mount network share with *.gho files from another PC with it; the other is Windows 7-based and in form of sdi image loadable to RAM, which takes 90 MB for ramdisk alone - this wouldn't work on a scope with 96 megabytes of RAM).

If there is some read error, then I see the following possibilities:
* corrupted ISO file - see md5sums of mine, at the end of this post, to make sure it is not the case
* improperly burned (failing CD recorder?)/marginal/faulty/dusty CD blank
* aging CD drive in the scope (failing laser?)
* issues with IDE cable
* issues with configuration (I remember for example that when I had only one CD-ROM on an IDE channel, configured as slave, it used to silently corrupt data read from CDs - rather small extent, but there was corruption)
* some bugs/quirks in chipset
* bad RAM/motherboard/PSU
You could kill two bird...eee points from the list above with one ston...ee with replacing CD drive with DVD one (I guess there's a plenty pata laptop drives on eBay, since this was the most popular kind until some 2009-2010 - of course provided that the scope has CD and not DVD drive by default) and preparing (and then burning) ISO containing all *.gho files (you need some software that could edit ISO files, then you need to open the first one and add all *.gho files extracted from subsequent images - you need to proceed in this way so the resultant ISO would still be bootable).

Or, alternatively, connect the HDD to another PC and use ghost for Windows.

MD5SUMs of my images:
--- Code: ---a2285f8acc7ab82dfca1181c416855f0 *M815G-T3A-Disk1.iso
365bc80cddbaff870f0b8b7f3cc67879 *M815G-T3A-Disk2.iso
92fae25cec4fd22f60219d729a05f182 *M815G-T3A-Disk3.iso
57b2fb33104fee5925853949b611bfd5 *M815G-T3A-Disk4.iso
--- End code ---


--- Quote from: Mrt12 on June 27, 2019, 08:37:11 pm ---attached is a picture of my scope.

--- End quote ---
I see two interface cards in there, I think it should be OK.

Mrt12:
I verified the MD5 sums. They are OK. I also tried to install Ghost in a Virtual Box, which worked fine, but is unable to restore the image because it misses some drivers, i.e. Ghost wants to reboot the PC and then misses some IDE or whatever drivers. I assume my PC hardware is too new for this old stuff to work reliably.... :-/

Mrt12:
OK I just tried it again, I burnt CD2 again on a different PC with a different drive. No success so far, the Ghost recovery still fails when it comes to part 2, claiming that there is "corruption in the image". If I hat Ghost32.exe I could recover the Image in a VirtualBox and then copy it to the scope, but I have no idea where to get that software.

nctnico:
Try to set the write speed to the slowest setting. CDRs written at high speed never worked for me especially when using in a different CDROM drive.

Mrt12:
I managed to get a copy of Ghost32.exe and used that in a VirtualBox to restore the images to  a virtual disk. My next step will then be to copy the virtual disk to the scope using CloneZilla, which I know works fine because I have already used CloneZilla to make an image of the installed hard disk.

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