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Saturday, 15 January 2022 Dereel Images for 15 January 2022
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teevee upgrade: more delays
Topic: technology, opinion Link here

Into the office this morning to continue the upgrade of teevee. Where's my DVD image?

-rw-r--r--  1 grog  lemis              0 14 Jan 17:18 FreeBSD-13.0-RELEASE-amd64-dvd1.iso
-rw-------  1 grog  lemis  3,594,911,276 14 Jan 19:31 FreeBSD-13.0-RELEASE-amd64-dvd1.iso.par

Only partially downloaded, after over 2 hours! What do you expect when you use a web browser to download large files? Restarted, but the real solution is to use a real program:

=== grog@eureka (/dev/pts/6) /src/ISOs 174 -> fetch https://download.freebsd.org/ftp/releases/ISO-IMAGES/13.0/FreeBSD-13.0-RELEASE-amd64-dvd1.iso
fetch: https://download.freebsd.org/ftp/releases/ISO-IMAGES/13.0/FreeBSD-13.0-RELEASE-amd64-dvd1.iso: No address record

Huh? What about on freefall?

=== grog@freefall (/dev/pts/4) ~ 30 -> fetch https://download.freebsd.org/ftp/releases/ISO-IMAGES/13.0/FreeBSD-13.0-RELEASE-amd64-dvd1.iso
FreeBSD-13.0-RELEASE-amd64-dvd1.iso                   4562 MB   92 MBps    49s

That looks better. Now just to copy it to eureka:

=== grog@eureka (/dev/pts/6) /src/ISOs 172 -> scp freefall:FreeBSD-13.0-RELEASE-amd64-dvd1.iso .
FreeBSD-13.0-RELEASE-amd64-dvd1.iso                           22% 1049MB  55.1KB/s 18:08:17 ETCorrupted MAC on input.
Disconnecting: Packet corrupt
lost connection

But by that time I wasn't looking any more: for some reason it copied even more slowly than the browser. So I let it run, and finally it was done:

-rw-r--r--  1 grog  lemis  4,784,017,408 15 Jan 16:44 FreeBSD-13.0-RELEASE-amd64-dvd1.iso

Another whole day wasted copying a file that, by video standards, isn't even very big. And then I had to copy it to an SD card (will that even work?)? It took nearly 10 minutes at only 9 MB/s.

=== root@dereel (/dev/pts/0) ~ 6 -> dd if=/src/ISOs/FreeBSD/FreeBSD-13.0-RELEASE-amd64-dvd1.iso of=/dev/da0 bs=128k
36499+1 records in
36499+1 records out
4784017408 bytes transferred in 527.020794 secs (9077474 bytes/sec)

Will it even work? gpart tells me:

=== root@dereel (/dev/pts/0) /home/grog 7 -> gpart show
=>      3  9343779  da0  GPT  (7.4G) [CORRUPT]
        3       24    1  freebsd-boot  (12K)
       27       53       - free -  (27K)
       80     4096    2  efi  (2.0M)
     4176  9339606       - free -  (4.5G)

=>      3  9343779  iso9660/13_0_RELEASE_AMD64_DVD  GPT  (7.4G) [CORRUPT]
        3       24                               1  freebsd-boot  (12K)
       27       53                                  - free -  (27K)
       80     4096                               2  efi  (2.0M)
     4176  9339606                                  - free -  (4.5G)

=>      3  9343779  diskid/DISK-201408282030  GPT  (7.4G) [CORRUPT]
        3       24                         1  freebsd-boot  (12K)
       27       53                            - free -  (27K)
       80     4096                         2  efi  (2.0M)
     4176  9339606                            - free -  (4.5G)

Given the time, I won't make any further progress until tomorrow.


Dogs changing coat?
Topic: animals Link here

Both Larissa and Lena have particularly curly coats on their backs. Well, some of it. Larissa has a smooth coat on her right side, but not on her left:


https://lemis.nyc3.digitaloceanspaces.com/grog/Photos/20220115/big/Larissa.jpeg
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And Lena has a smooth section on the middle of her back:

 
https://lemis.nyc3.digitaloceanspaces.com/grog/Photos/20220115/small/Lena-1.jpeg
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It's interesting to note the change of colour of Lena's coat. I wonder what it will look like in a couple of months' time.


Sunday, 16 January 2022 Dereel Images for 16 January 2022
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Cleaning filters
Topic: photography Link here

How do some people keep their lenses so clean? I have bought a number of second-hand lenses, and the glass has always been spotless. I have given up on that a long time ago, and instead I put filters in front of the lenses. That protects the lens and makes it easier to clean, at least in theory.

Today I had a dirty filter. OK, take it off and clean it in the iso-propyl alcohol that I had bought for the purpose. It doesn't work! The smudges didn't go by themselves, and somewhere I ended up with granules of something that weren't there before. Lens cleaning tissue? It spreads the smudge around. In the end, things looked worse than before.

OK, to the bathroom. Wash the filter in warm water and kitchen detergent. Rinse copiously. Soak up the remaining droplets with a serviette (just touch, don't rub). Done!

No idea if this would work with hard water.


Upgrading teevee, day 3
Topic: technology, opinion Link here

It took me all day yesterday to get a boot image for my upgrade to teevee. And it was for a DVD. But I wanted to install from a memory stick. And in fact all I had was an SD card in a card reader. Can I even boot from that?

Yes! But that was the only good news. It failed to boot in exactly the same way as the memory stick did on Friday:

 
https://lemis.nyc3.digitaloceanspaces.com/grog/Photos/20220116/small/ThinkCentre-boot-failure-1.jpeg
Image title: ThinkCentre boot failure 1
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Clearly there's something wrong with the distribution media, since the computer itself (ThinkCentre 91p) works, and the boot media works with other ThinkCentres (M93p). What should I do?

The screen corruption at the top of the screen wasn't reproducible, but the hang was. I tried it with the standard boot, “safe mode”, boot to single user, and it always hangs in the same place. The -v option doesn't produce any additional information.

Entered a bug report. I don't have much hope of a quick fix, but this kind of problem needs to be documented.

So what do I do now? Copy an installation from another system? No, I don't think so. I'm trying to make this a textbook installation; I'll need to find another machine or other installation media. Another day with no progress.


This page contains (roughly) yesterday's and today's entries. I have a horror of reverse chronological documents, so all my diary entries are chronological. This page normally contains the last two days, but if I fall behind it may contain more. You can find older entries in the archive. Note that I often update a diary entry a day or two after I write it.     Do you have a comment about something I have written? This is a diary, not a “blog”, and there is deliberately no provision for directly adding comments. It's also not a vehicle for third-party content. But I welcome feedback and try to reply to all messages I receive. See the diary overview for more details. If you do send me a message relating to something I have written, please indicate whether you'd prefer me not to mention your name. Otherwise I'll assume that it's OK to do so.


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