[Solved] Doublespace disk read error on reboot+workaround

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[Solved] Doublespace disk read error on reboot+workaround

Postby divxmaster » Tue Jan 13, 2015 3:02 am

Hi,
I've run into a problem with doublespace, that is when rebooting after conversion, it comes
up with "A disk read error has occurred, press ctrl-alt-del to restart"
I have tried it on two laptops, and both have had this error. Fresh installs of win8pro for testing.
(I managed to work around/hack this problem, which I will detail at the bottom of post)

I then booted into windows repair cmdline, ran attrib to see the real files stored on C:
(note that my system swaps the drive letters when in 'dos' mode or equivalent, so D: in this log, is C: when booted):

(attrib)
The target of the symbolic link D:\bootmgr does not exist
The target of the symbolic link D:\BOOTNXT does not exist
D:\scratch0.txt
The target of the symbolic link D:\swapfile.sys does not exist
D:\ZIPmagic.wim
D:\ZIPmagic.wim.log.txt

wimlog:
Unable to set WIM error output:: 0 [WIMLIB] (at 13187)
Unable to create new WIM:: 0 [WIMLIB] (at 13203)
Unable to set WIM chunk size:: 0 [WIMLIB] (at 13203)
Unable to extract WIM to D:\:: 0 [WIMLIB] (at 1286375)

I restored my C: drive with acronis, then reran doublespace. exactly the same issue.
It doesn't seem to be linking bootmgr and bootnxt properly.

- now the workaround/hack:

before running doublespace, copy boot, bootmgr, bootnxt, bootsect.bak and swapfile.sys to another drive/usb stick (into a folder).
Set permissions for the entire folder to - everyone, full control (if ntfs)

From the windows repair command line, run:
attrib /L -h -s -r *.*
this unhides the actual symlinks (/L)
del bootmgr
del bootnxt
del bootsect.bak
del swapfile.sys
copy the entire contents of the folder you created above, into the root of your system drive
(normally C:, but as mentioned above, D: on my system when in repair, which is seen as C: in windows)

reboot, and it boots fine.
tested this twice.

any ideas what is causing this? The above laptop has one 32gb msata ssd, and one 500gb sata.
the other laptop with the same issue has only one drive, a 160gb sata.

Cheers,
Divxmaster
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby admin » Sun Jan 18, 2015 7:33 pm

Thank you so much for the report, and for generously providing a workaround.

These files are excluded from processing altogether by DoubleSpace. Is your WimBootCompress.ini file missing our out of date? It is found in the system32 folder under your windows folder. Please feel free to paste the contents of that file here.

If that file is sound, we'll need to figure out what else is unique about your system that may be causing this problem. It sounds like your boot partition is the same as your system partition - that is, you did not create a boot partition for Windows at all. This is near impossible to do these days on Windows 8.1 without advanced finagling during the Windows setup process. Can you confirm if this might be the case?

If it indeed is, I suspect that you used an Undo Disk, and did not do direct processing. DoubleSpace has actually even been validated in the scenario where no boot partition is created for Windows, but it does not specify whether this validation was performed with or without an Undo Disk. Please let me know exactly which compression settings you used and whether you used an Undo Disk, and we should be able to solve this problem for all users.
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby divxmaster » Sun Jan 18, 2015 9:49 pm

Hi,
I am using the MLF version of win 8.1 pro, which I think used to be called VLP?
(volume licence processing).

This doesn't appear to create the small partitions when installing, it just creates
one partition as SYSTEM and BOOT. (which is great).
When I installed, there was already a single partition for C:, which I formatted then
installed during the install process. This perhaps also is the reason, I didn't
install into 'unallocated space'.

wimbootcompress shouldn't be outdated for any reason I can think of. is attached.
All updates were applied before disk was doublespaced. including KB3000850.

An undo disk was created on the first occurrence of this problem (on the single hd laptop),
but no undo disk was created on the two attempts on my main laptop (2 hd's)

Cheers,
Divxmaster
Attachments
WimBootCompress.7z
(956 Bytes) Downloaded 494 times
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby divxmaster » Mon Jan 19, 2015 12:46 am

update:

Did some testing, and yes, Win 8.1 is the same as Win7, - if you install to an already existing partition,
it doesn't create system reserved. So, nothing to do with the version, and pretty easy to accomplish,
even if you have to boot to repair and use diskpart to create a single partition.
(which is what I did, after initially creating a system reserved by choosing unallocated space)

*oh, and I used all zipmagic defaults, standard compression.

Cheers,
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby admin » Mon Jan 19, 2015 3:02 am

Thanks so much! Looking into this now.
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby admin » Mon Jan 19, 2015 3:23 am

Here's the finagling I was referring to:
Windows 8.1 x64 Single Partition Layout-2015-01-18-22-21-06.png
Windows 8.1 x64 Single Partition Layout-2015-01-18-22-21-06.png (41.5 KiB) Viewed 9248 times

Selecting the empty space on disk and electing to create a partition in the maximum available size displays this message box. I'll figure how to work around it, but I am curious how you were able to bypass this issue (maybe your disk was pre-formatted somehow?)
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby divxmaster » Mon Jan 19, 2015 3:45 am

Hi,
yes it will always show that message, if you try to install it into unallocated space.
In my case, well both cases on both machines, they were already running windows 7. So there already
was a single partition there (I created it when I installed win7 years ago).

If you want to finagle it, you can boot the win install usb/disc, go into repair, go to command line.
from there, run diskpart
then enter 'list disk', shows your disks, find your disk number 'Disk x' and enter 'Select disk x'
then enter list partition, presuming there are no partitions on the disk, or the place you want to
put windows is unallocated, enter 'create partition primary'. this will create a single partition on
all of the disk, or the remaining unallocated space. I then entered 'active'. but this is probably not
required.
Anyway, I presume you are up to speed with diskpart, so that is how you do it.

Cheers,
Divxmaster
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby admin » Mon Jan 19, 2015 4:11 am

It looks like you cannot even force Windows 8.1 to install on an (U)EFI system in single partition mode

You must have a BIOS system.

The finagling is easy, you just create a partition manually; and then extend it - both in the GUI Windows setup - to cover all available disk space after creating it (so no need for diskpart, console, etc.)

If you try to do this with an (U)EFI system, Windows setup says a required partition cannot be found - and it refuses to continue.

Does work fine on BIOS. Expect a fix soon.
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby divxmaster » Mon Jan 19, 2015 5:37 am

Hi,
yes definitely in BIOS mode. UEFI is annoying and restricted. I thought everybody turned it off!
Not sure if it has any benefits I can think of. Well apart from being able to boot from >2.2TB
GPT, but who has a ssd that big.

Cheers
(gidday from NZ btw, you are in aus right?)
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Re: Doublespace problem, disk read error on reboot+workaroun

Postby admin » Mon Jan 19, 2015 8:01 pm

Indeed! Thanks again for your help IDing this issue. Expect a fix soon :)
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