[Answered] I has the physical disk of Windows XP Pro Service Pack 1a, my checksums are genuine?

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@bencu55
Load your XP cd into your cd drive and run in cmd:

Code:

crc.exe x:

("x" is letter of your cd drive)

That's your baseline.

Redump with 7z and see if you get same value...

 

These are checksums for English version:

XRMPFPP_EN.iso
Filesize: 565 854 208 bytes (539.64 MB)
MD5: CAE234FB80361EDAACEFE5F48B203B86
SHA1: 02695740D94FFB094FC3E80A7111C9501D534F6D
CRC32: FFFFFFFF

There is no evidence about Hungarian version.

 

He did (or did not , how he could verify a oem image in the first place was, well, don't see that often)
Anyway, i can relay convo with @bencu55 best i can

There is now , however, if OP like to upload image or not is entirely up to him.

 

There is a tool (similar to the CRC posted above) - MSCDCRC 4.11 CD-ROM Disc Verification Utility Copyright (C) Microsoft, 1992-2004 upgraded with SHA-1.
So far it's still not shared but there are some references:

Code:

MSCDCRC 4.22 CD-ROM Disc Verification Utility
Copyright (C) Microsoft, 1992-2004

MSCDCRC: Verifying disc in drive D: (1,479,409,664 bytes)

100% complete

MSCDCRC: Computed CRC is 0x8F7459EA
MSCDCRC: SHA1 hash is 0xED7CC8AF67FF4031E450DBA2338089B91F0DEC6A

[REQUEST/INFO] MS Windows Security Update CD - February 2004 [Multilanguage]

Code:

MSCDCRC 4.26 CD-ROM Disc Verification Utility
Copyright (C) Microsoft, 1992-2004
DDP (R) is trademark of DCA Inc. and is Licensed from DCA Inc.

MSCDCRC: Verifying file Microsoft Windows Security Update CD (2004-02)\SECURITY9_CHS_12.iso (489,734,144 bytes)

100% complete

MSCDCRC: AutoCRC is 0xF4AD1F18
MSCDCRC: Computed CRC is 0xFFFFFFFF
MSCDCRC: SHA1 hash is 0x579EC3B0F6D082C1915602FEC943F32A8F399E0C

MSCDCRC: This file contains a VALID computed CRC indicating the contents
         of the file are correct.

This reads the true blocksize of a iso without trailing padding.
You can do this in a hex editor as well, opening a logical drive and calculate checksum but normally you would calculate the hole block, including trailing padding.
That gives a different checksum (usually called padded/overpadded etc)

Size is found at 0x8050-0x8053 and 0x8054-0x8057 (difference is reversed endianess)
Select 0x8054-0x8057 value, remove whitespace (xx xx xx xx -> xxxxxxxx) and convert this hex value to decimal value
We continue using decimal values
This poop's out total sector's value, take this value and multiply with 2048 (sector size value) and you get total (true) bytesize value of iso
You can now select block size offset start 0 to offset end bytesize
(remember - total bytesize starts from 1 but in a hexeditor we start at 0 so you must subtract total bytesize by 1)
Calculate checksum of this block - done.

Since this iso has AutoCRC, you can test that you selected correct blocksize and offsets by calculating CRC-32, this should output CRC-32: FFFFFFFF

(if anyone wondered how )