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Sat, Oct 06, 2018 10:35 pm

Deleting Windows backups after specified media type is invalid message

When I checked on the status of the weekly backup process on a Microsoft Windows 10 system by issuing a wbadmin get versions command at a command prompt, I saw that no backups had been created since July of 2018.

Microsoft Windows [Version 10.0.17134.285]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>wbadmin get versions
wbadmin 1.0 - Backup command-line tool
(C) Copyright 2013 Microsoft Corporation. All rights reserved.

Backup time: 7/17/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 07/17/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {76dc6b17-ef40-418f-b13a-a332f3f18c66}

Backup time: 7/24/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 07/24/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {f394de8f-b3e2-4cc0-a2ee-ffb12448f1c6}

Backup time: 7/31/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 07/31/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {275475f1-22d9-455d-893b-f327b8069f99}

Backup time: 8/7/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 08/07/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {58902ac7-c0aa-4384-9abf-b96e89fe1954}

Backup time: 8/14/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 08/14/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {7600fdeb-9722-4f0d-9647-6a5a22613a40}

Backup time: 8/21/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 08/21/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {05e8eefe-486f-4286-bf7a-57ca7ba192e6}

Backup time: 8/28/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 08/28/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {cc0c16df-4eb2-43ca-bb40-4d02928e7617}

Backup time: 9/4/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 09/04/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {98c0f7a3-ca59-4c78-b4c3-5ff716a60bf2}

Backup time: 9/11/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 09/11/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {b066d090-fd1f-44e2-9899-b5defe860e65}

Backup time: 9/18/2016 7:00 PM
Backup target: 1394/USB Disk labeled My Passport(K:)
Version identifier: 09/18/2016-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {88b6a6aa-dce0-439b-96b8-98e1038411cd}

Backup time: 5/27/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 05/27/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {e7999e64-18ef-4ffe-826f-63460ae10a95}

Backup time: 6/3/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 06/03/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {ed35b3bb-5409-4351-82b3-42829908d5b2}

Backup time: 6/10/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 06/10/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {8dd10f96-c62e-42e9-9d68-0947f529db52}

Backup time: 6/17/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 06/17/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {0ebd7188-35b3-4317-bb20-b718dfd35789}

Backup time: 6/24/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 06/24/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {93803f25-207b-410d-891f-d1e8244236aa}

Backup time: 7/1/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 07/01/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {76022746-9b00-4380-a08b-d9a9b5bdd2d8}

Backup time: 7/8/2018 7:00 PM
Backup target: 1394/USB Disk labeled Seagate Backup Plus Drive(K:)
Version identifier: 07/08/2018-23:00
Can recover: Volume(s), File(s), Application(s), Bare Metal Recovery, System State
Snapshot ID: {030fb852-6e15-4ad3-8acb-e0b0d0057e87}


C:\WINDOWS\system32>

When I checked the free space left on the drive on which the backups were stored from the Windows File Explorer, I saw there was only a few megabytes of free disk space left, so I attempted to delete some of the prior backups with the wbadmin command, but I was unable to delete them with the message "failed with error: The specified media type is invalid" message appearing.

[ More Info ]

[/os/windows/win10] permanent link

Fri, Oct 05, 2018 9:39 pm

Checking port 465 connectivity

I needed to check on whether a system was functioning as a mail server listening on the Simple Mail Transfer Protocol Secure (SMTPS) port, TCP port 465. One way to check is to attempt to establish a telnet connection to that port. E.g.:

$ telnet 192.168.248.91 465
Trying 192.168.248.91...
Connected to esa.example.com
Escape character is '^]'.
^C
^CConnection closed by foreign host.
$

If you see a "connected to" message that indicates the system is listening on that port and you can terminate the connection by hitting Ctrl-C a couple of times. But you can also use an OpenSSL command as shown below to test SMTPS connectivity on TCP port 465:

$ openssl s_client -connect 192.168.248.91:465 -quiet
depth=0 /OU=Zimbra Collaboration Server/CN=esa.example.com
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 /OU=Zimbra Collaboration Server/CN=esa.example.com
verify error:num=27:certificate not trusted
verify return:1
depth=0 /OU=Zimbra Collaboration Server/CN=esa.example.com
verify error:num=21:unable to verify the first certificate
verify return:1
220 esa.example.com ESMTP Postfix
quit
221 2.0.0 Bye
$

If you leave the -quiet off the end of the command, you can see additional information about the certificate on the email server.

Related articles:

  1. Using the openssl command to troubleshoot POP3S

[/network/email] permanent link

Thu, Oct 04, 2018 9:47 pm

Extracting images from an Excel spreadsheet

I needed to extract two diagrams from a worksheet in a Microsoft Excel workbook. The diagrams appeared to have been put in the worksheet as an image through a copy and paste operation. I could right-click on an image in the sheet and choose "Copy" or "Save as Picture" and for the latter option I could choose PNG, JPEG, PDF, GIF, or BMP for the "Save as Type" value, but I wondered what type of file Excel was using for the embedded image. The file was a .xlsm file, which like a .xlsx file is an Office Open XML (OpenXML) file format that can be "unzipped" to reveal the constituent files within it by renaming the file to have a .zip filename extension or copying the file to a new file with a .zip extension - see Zipping and unzipping Excel xlsx files. So I copied the file giving the new file a .zip extension and then extracted the contents of that file by unzipping it. I then had a file named "[Content_Types].xml" and the following directories in the directory where I had extracted files from the zip file:

_rels
customXml
docProps
xl

[ More Info ]

[/os/windows/office/excel] permanent link

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