CRC errors?

This is the Hobbyist 8.3 AXP CD-ROM:

FROG$DKA600: Mounted alloc 0 ALPHA083 15876 1 1

FROG> unzip -t dka600:[kits]ALPHA_FOR0801.ZIP
Archive: DKA600:[KITS]ALPHA_FOR0801.ZIP;1
testing: alpha_fort0801/documentation/ OK
testing: alpha_fort0801/kit/ OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.txt OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.txt OK
testing: alpha_fort0801/kit/dec-axpvms-cxml-v0502-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-forrtl-v0706-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-fortran-v0800-2-1.pcsi OK
No errors detected in compressed data of DKA600:[KITS]ALPHA_FOR0801.ZIP;1.
FROG> del [kits]alpha_for0801.zip;
FROG> copy dka600:[kits]ALPHA_FOR0801.ZIP DKA100:[KITS]/log
%COPY-S-COPIED, DKA600:[KITS]ALPHA_FOR0801.ZIP;1 copied to DKA100:[KITS]ALPHA_FO
R0801.ZIP;1 (61807 blocks)
FROG> unzip -t dka100:[kits]ALPHA_FOR0801.ZIP
Archive: DKA100:[KITS]ALPHA_FOR0801.ZIP;1
testing: alpha_fort0801/documentation/ OK
testing: alpha_fort0801/kit/ OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.txt OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.ps bad CRC 77e780
71 (should be 9d7eab51)
testing: alpha_fort0801/documentation/alpha_fort0801_spd.txt OK
testing: alpha_fort0801/kit/dec-axpvms-cxml-v0502-1-1.pcsi
error: invalid compressed data to inflate
testing: alpha_fort0801/kit/dec-axpvms-forrtl-v0706-1-1.pcsi
error: invalid compressed data to inflate
testing: alpha_fort0801/kit/dec-axpvms-fortran-v0800-2-1.pcsi
error: invalid compressed data to inflate
At least one error was detected in DKA100:[KITS]ALPHA_FOR0801.ZIP;1.
FROG> unzip
UnZip 5.40 of 28 November 1998, by Info-ZIP. For more details see: unzip -v.

I get the same results if I use a disk image created on the MacBook Pro host or the real CD-ROM in the MacBook drive. I also get the same results with the unzip 5.52 version on the CD-ROM.

Looks like there is something different in the reads done by the COPY command and the reads done by unzip.

Using backup to copy the files off the CD-ROM also works.

FROG> BACKUP dka600:[kits]ALPHA_FOR0801.ZIP DKA100:[KITS]/log
%BACKUP-S-CREATED, created DKA100:[KITS]ALPHA_FOR0801.ZIP;1
FROG> unzip -t dka100:[kits]ALPHA_FOR0801.ZIP
Archive: DKA100:[KITS]ALPHA_FOR0801.ZIP;1
testing: alpha_fort0801/documentation/ OK
testing: alpha_fort0801/kit/ OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.txt OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.txt OK
testing: alpha_fort0801/kit/dec-axpvms-cxml-v0502-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-forrtl-v0706-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-fortran-v0800-2-1.pcsi OK
No errors detected in compressed data of DKA100:[KITS]ALPHA_FOR0801.ZIP;1.
F


No problem with a similar operation on a real DS-10.

EAGLE$DQB1: Mounted alloc 0 ALPHA083 7.75MB 1 1

Real DS-10:

EAGLE> unzip -t dqb1:[kits]ALPHA_FOR0801.ZIP
Archive: DQB1:[KITS]ALPHA_FOR0801.ZIP;1
testing: alpha_fort0801/documentation/ OK
testing: alpha_fort0801/kit/ OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.txt OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.txt OK
testing: alpha_fort0801/kit/dec-axpvms-cxml-v0502-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-forrtl-v0706-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-fortran-v0800-2-1.pcsi OK
No errors detected in compressed data of DQB1:[KITS]ALPHA_FOR0801.ZIP;1.
EAGLE> copy DQB1:[KITS]ALPHA_FOR0801.ZIP DISK$BIGDISK:[KITS]
EAGLE> unzip -t disk$bigdisk:[kits]ALPHA_FOR0801.ZIP
Archive: DISK$BIGDISK:[KITS]ALPHA_FOR0801.ZIP;1
testing: alpha_fort0801/documentation/ OK
testing: alpha_fort0801/kit/ OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_iguide.txt OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.ps OK
testing: alpha_fort0801/documentation/alpha_fort0801_spd.txt OK
testing: alpha_fort0801/kit/dec-axpvms-cxml-v0502-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-forrtl-v0706-1-1.pcsi OK
testing: alpha_fort0801/kit/dec-axpvms-fortran-v0800-2-1.pcsi OK
No errors detected in compressed data of DISK$BIGDISK:[KITS]ALPHA_FOR0801.ZIP;1.
EAGLE> unzip /version
UnZip 5.32 of 3 November 1997, by Info-ZIP. For more details see: unzip -v.

I forgot to add that I am seeing these errors on every ZIP file on the CD-ROM that I have copied to the "local" hard drive so far.

John,

thanks for running these tests. So it looks like COPYing those .ZIP files from the CD to a FreeAXP virtual disk seems to CORRUPT the .ZIP file !

As BACKUP works, could you use the following technique to find out, which blocks are being corrupted and what the corruption pattterns look like ?

$ COPY the .ZIP file from CD to the virtual disk
$ BACKUP the .ZIP file from CD to the virtual disk
$ BACKUP/COMPARE file-copied-with-COPY file-copied-with-BACKUP

This should report the VBNs of any blocks, which are different. Then use DUMP and compare those blocks in those 2 files. This should show the differences...

Volker.

Looks like its a bad kit. Nice to know FreeAXP matches the Alpha's output. Good test. Thanks!

Info-Zip UNZIP 6.0 on AlphaServer 400 running VMS 7.3-2

< class='quote' style='width:400px;white-space:nowrap;overflow:auto'><code style='white-space:nowrap'>$ $ UNZIP BASIC016
Archive: DKA0:[KITS]BASIC016.ZIP;1
creating: [.BASIC016.DOCUMENTATION]
creating: [.BASIC016.KIT]
inflating: [.BASIC016.DOCUMENTATION]BASIC016_COVER.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_COVER.TXT
inflating: [.BASIC016.DOCUMENTATION]BASIC016_IGUIDE.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_IGUIDE.TXT
inflating: [.BASIC016.DOCUMENTATION]BASIC016_SPD.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_SPD.TXT bad CRC c174c123 (should be 31b98e50)
inflating: [.BASIC016.KIT]BASIC016.A
inflating: [.BASIC016.KIT]BASIC016.B
[ _close_qio: sys$synch found I/O failure ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
inflating: [.BASIC016.KIT]BASIC016.C
inflating: [.BASIC016.KIT]BASIC016.D bad CRC d4f8f664 (should be cef1e30f)
[ WriteQIO: sys$synch found I/O failure ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
[ WriteQIO: sys$synch found I/O failure ]
inflating: [.BASIC016.KIT]BASIC016.E
inflating: [.BASIC016.KIT]BASIC016.F
inflating: [.BASIC016.KIT]BASIC016.G bad CRC 92a0891b (should be 6f16cea2)
inflating: [.BASIC016.KIT]BASIC016.H

inflating: [.BASIC016.KIT]BASIC016.I late

error: invalid compressed data to inflate<br><br><br></code>

Info-Zip UNZIP 6.0 on FreeAXP running VMS 7.3-2

< class='quote' style='width:400px;white-space:nowrap;overflow:auto'><code style='white-space:nowrap'>$ unzip basic016
Archive: DKA0:[KITS]BASIC016.ZIP;1
creating: [.BASIC016.DOCUMENTATION]
creating: [.BASIC016.KIT]
inflating: [.BASIC016.DOCUMENTATION]BASIC016_COVER.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_COVER.TXT
inflating: [.BASIC016.DOCUMENTATION]BASIC016_IGUIDE.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_IGUIDE.TXT
inflating: [.BASIC016.DOCUMENTATION]BASIC016_SPD.PS
bad CRC c174c123 (shoul
inflating: [.BASIC016.DOCUMENTATION]BASIC016_SPD.TXT
inflating: [.BASIC016.KIT]BASIC016.A
inflating: [.BASIC016.KIT]BASIC016.B
[ _close_qio: sys$synch found I/O failur
e ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
inflating: [.BASIC016.KIT]BASIC016.C
inflating: [.BASIC016.KIT]BASIC016.D bad CRC d4f8f664 (should be cef1e30f)
[ WriteQIO: sys$synch found I/O failure
]
[ %SYSTEM-W-ENDOFFILE, end of file ]
[ WriteQIO: sys$synch found I/O failure ]
inflating: [.BASIC016.KIT]BASIC016.E
inflating: [.BASIC016.KIT]BASIC016.F
inflating: [.BASIC016.KIT]BASIC016.G bad CRC 92a0891b (should be 6f16cea2)
inflating: [.BASIC016.KIT]BASIC016.H

inflating: [.BASIC016.KIT]BASIC016.I late

error: invalid compressed data to inflate
<br><br><br></code>

Info-Zip UNZIP 5.42 on Integrity RX2600 running VMS 8.3

< class='quote' style='width:400px;white-space:nowrap;overflow:auto'><code style='white-space:nowrap'>$ unzip basic016
Archive: DROPOFF_ROOT:[DCOOK]BASIC016.ZIP;1
creating: [.basic016.documentation]
creating: [.basic016.kit]
inflating: [.basic016.documentation]basic016_cover.ps
inflating: [.basic016.documentation]basic016_cover.txt
inflating: [.basic016.documentation]basic016_iguide.ps
inflating: [.basic016.documentation]basic016_iguide.txt
inflating: [.basic016.documentation]basic016_spd.ps
inflating: [.basic016.documentation]basic016_spd.txt bad CRC c174c123 (should be 31b98e50)
inflating: [.basic016.kit]basic016.a
inflating: [.basic016.kit]basic016.b
[ _close_qio: sys$synch found I/O failure ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
inflating: [.basic016.kit]basic016.c
inflating: [.basic016.kit]basic016.d bad CRC d4f8f664 (should be cef1e30f)
[ WriteQIO: sys$synch found I/O failure ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
[ WriteQIO: sys$synch found I/O failure ]
inflating: [.basic016.kit]basic016.e
inflating: [.basic016.kit]basic016.f
inflating: [.basic016.kit]basic016.g bad CRC e0770a08 (should be 6f16cea2)
inflating: [.basic016.kit]basic016.h

inflating: [.basic016.kit]basic016.i late

error: invalid compressed data to inflate
<br><br><br></code>

Info-Zip UNZIP 6.0 on Integrity RX2600 running VMS 8.3

< class='quote' style='width:400px;white-space:nowrap;overflow:auto'><code style='white-space:nowrap'>$ unzip basic016
Archive: DROPOFF_ROOT:[DCOOK]BASIC016.ZIP;1
new version of [.BASIC016.DOCUMENTATION]BASIC016_COVER.PS? [y]es, [n]o, [A]ll, [N]one, [r]ename: A
inflating: [.BASIC016.DOCUMENTATION]BASIC016_COVER.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_COVER.TXT
inflating: [.BASIC016.DOCUMENTATION]BASIC016_IGUIDE.PS
inflating: [.BASIC016.DOCUMENTATION]BASIC016_IGUIDE.TXT
inflating: [.BASIC016.DOCUMENTATION]BASIC016_SPD.TXT bad CRC c174c123 (should be 31b98e50)
inflating: [.BASIC016.KIT]BASIC016.A
inflating: [.BASIC016.KIT]BASIC016.B
[ _close_qio: sys$synch found I/O failure ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
inflating: [.BASIC016.KIT]BASIC016.C
inflating: [.BASIC016.KIT]BASIC016.D bad CRC d4f8f664 (should be cef1e30f)
[ WriteQIO: sys$synch found I/O failure ]
[ %SYSTEM-W-ENDOFFILE, end of file ]
[ WriteQIO: sys$synch found I/O failure ]
inflating: [.BASIC016.KIT]BASIC016.E
inflating: [.BASIC016.KIT]BASIC016.F
inflating: [.BASIC016.KIT]BASIC016.G bad CRC 92a0891b (should be 6f16cea2)
inflating: [.BASIC016.KIT]BASIC016.H

inflating: [.BASIC016.KIT]BASIC016.I late

error: invalid compressed data to inflate<br><br><br></code>

WinZip has problems with the archive. WinZip 12.0 Pro log:

< class='quote' style='width:400px;white-space:nowrap;overflow:auto'><code style='white-space:nowrap'>Extracting file: E:&#92;Transfers&#92;BASIC016.ZIP
Extracting to "E:&#92;Transfers&#92;BASIC016&#92;"
Use Path: yes Overlay Files: no
creating: E:&#92;Transfers&#92;BASIC016&#92;basic016&#92;documentation&#92;
creating: E:&#92;Transfers&#92;BASIC016&#92;basic016&#92;kit&#92;
Extracting basic016_cover.ps
Extracting basic016_cover.txt
Extracting basic016_iguide.ps
Extracting basic016_iguide.txt
Extracting basic016_spd.ps
CRC check failed
Error: Unable to extract "E:&#92;Transfers&#92;BASIC016&#92;basic016&#92;documentation&#92;basic016_spd.ps".

The size of the extracted file (432225) does not match the uncompressed size (431656) recorded in the Zip file
Extracting basic016_spd.txt
Extracting basic016.a
Extracting basic016.b
CRC check failed
Error: Unable to extract "E:&#92;Transfers&#92;BASIC016&#92;basic016&#92;kit&#92;basic016.b".

The size of the extracted file (9587703) does not match the uncompressed size (9584640) recorded in the Zip file
Extracting basic016.c
CRC check failed
Error: Unable to extract "E:&#92;Transfers&#92;BASIC016&#92;basic016&#92;kit&#92;basic016.c".

The size of the extracted file (680698) does not match the uncompressed size (681984) recorded in the Zip file
Extracting basic016.d
Error: Invalid compressed data to expand (inflate) the file
Extracting basic016.e
Extracting basic016.f
CRC check failed
Error: Unable to extract "E:&#92;Transfers&#92;BASIC016&#92;basic016&#92;kit&#92;basic016.f".

The size of the extracted file (202241) does not match the uncompressed size (202752) recorded in the Zip file
Extracting basic016.g
Extracting basic016.h
Error: Invalid compressed data to expand (inflate) the file
Extracting basic016.i
Error: Invalid compressed data to expand (inflate) the file
<br><br><br></code>

This is on FreeAxp on Windows XP under VirtualBox on a Macbook pro.

FROG&gt; copy dka600:[kits]alpha_for0801.zip []alpha_for0801a.zip
FROG&gt; backup/compare alpha_for0801.zip alpha_for0801a.zip
%BACKUP-E-VERIFYERR, verification error for block 243 of DKA100:[KITS]ALPHA_FOR0
801A.ZIP;1
%BACKUP-E-VERIFYERR, verification error for block 615 of DKA100:[KITS]ALPHA_FOR0
801A.ZIP;1
[Many more of similar messages snipped.


This is on a real DS-10

EAGLE&gt; copy DQB1:[KITS]ALPHA_FOR0801.ZIP DISK$BIGDISK:[KITS]
EAGLE&gt; backup DQB1:[KITS]ALPHA_FOR0801.ZIP DISK$BIGDISK:[KITS]alpha_for0801a.zip
EAGLE&gt; BACKUP/COMPARE ALPHA_FOR0801.ZIP ALPHA_FOR0801A.ZIP

There were no errors detected.

The FreeAXP system does not have any ECOs installed on it.

The DS-10 has vms83a_rms v2.0 and v4.0, vms83a_update V2.0 and V5.0, and some others.

Regards,
-John