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Russian army vehicle from the 1970s destroyed by Ukraine highlights Russia’s struggle with replacing its battle-stricken tank fleet in c/[email protected]
[–] [email protected] 20 points 7 months ago (1 children)

That's kind of the point of the article, I guess. What is a museum piece doing on the battlefield?

How to fix my ZFS pool mistakes in c/[email protected]
[–] [email protected] 1 points 7 months ago (1 children)

Then why do you think manufacturers still list these failure rates (to be sure, it is marked as a limit, not an actual rate)? I'm not being sarcastic or facetious, but genuinely curious. Do you know for certain that it doesn't happen regularly? During a scrub, these are the kinds of errors that are quietly corrected (althouhg the scrub log would list them), as they are during normal operation (also logged).

My theory is that they are being cautious and/or perhaps don't have any high-confidence data that is more recent.

Russian army vehicle from the 1970s destroyed by Ukraine highlights Russia’s struggle with replacing its battle-stricken tank fleet in c/[email protected]
[–] [email protected] 13 points 7 months ago* (last edited 7 months ago) (8 children)

The Leopard 2 was designed in the 70s. So for battlefield vehicle designs, that is not necessarily outdated. Most fighter aircraft in use today were desgigned in the 70s: Su-27, MiG-29, sure, we think they're old, but the F-16, F-15, F/A-18 are roughly the same age.

How to fix my ZFS pool mistakes in c/[email protected]
[–] [email protected] 0 points 7 months ago

Bit error rates have barely improved since then. So the probability of an error whenr reading a substantial fraction of a disk is now higher than it was in 2013.

But as others have pointed out. RAID is not, and never was, a substitute for a backup. Its purpose is to increase availability. And if that is critical to your enterprise, these things need to be taken into account, and it may turn out that raidz1 with 8 TB disks is fine for your application, or it may not. For private use, I wouldn't fret. but make frequent backups.

This article was not about total disk failure, but about the much more insidious undetected bit error.

How to fix my ZFS pool mistakes in c/[email protected]
[–] [email protected] 1 points 7 months ago (3 children)

Let's do the math:

The error-reate of modern hard disks is usually on the order of one undetectable error per 1E15 bits read, see for example the data sheet for the Seagate Exos 7E10. An 8 TB disk contains 6.4E13 (usable) bits, so when reading the whole disk you have roughly a 1 in 16 chance of an unrecoverable read error. Which is ok with zfs if all disks are working. The error-correction will detect and correct it. But during a resilver it can be a big problem.

US has urged Ukraine to halt strikes on Russian energy infrastructure in c/[email protected]
[–] [email protected] 10 points 7 months ago

Bloody bigots (if true). This is a desperate measure by Ukraine, from which the UAF actually refrained as long as the US supported them!

Now they don't and they don't.

So give them the means for a meaningful defense (and offensive) on their own land, and they won't have to resort to strategic bombing. (Or droning, or cruise-missiling, or whatever it's called.)

I know these are different parts of the government, but still.

US House Speaker promises to unblock aid to Ukraine but with significant changes in c/[email protected]
[–] [email protected] 2 points 7 months ago

Don’t think Mike Johnson wants to help Ukraine though. This is just him stalling for time.

Yes, I think this is exactly what it is.

US House Speaker promises to unblock aid to Ukraine but with significant changes in c/[email protected]
[–] [email protected] 7 points 7 months ago

I really can't say. But I definitely think that the latest efforts by Johnson serve the explicit purpose of making the Discharge Petition less likely to succeed.

US House Speaker promises to unblock aid to Ukraine but with significant changes in c/[email protected]
[–] [email protected] 36 points 7 months ago* (last edited 7 months ago) (4 children)

It's a trap. If the House changes the bill, it has to pass through the Senate again, which is not guaranteed. This talk is intended to distract from the Discharge Petition that was initiated by a Democrat to approve the Senate's bill. The hardliner Republicans, first and foremost Mike Johnson, have made it crystal clear through their actions that they have no intentions of helping Ukraine. The Democrats built golden bridges by agreeing to border security measures which many of them find abhorrent, and by agreeing to combine it with help for Israel, which some Democrats also don't like at the moment. And still Johnson flatly refused to even consider it.

Speaker Johnson says the right things ("No one wants Vladimir Putin to prevail. I’m of the opinion that he wouldn’t stop at Ukraine … and go all through the way through Europe. There is a right and wrong there, a good versus evil in my view and Ukraine is the victim here"), but his actions speak louder with a very different message.

Sidestepping Congress, White House Announces Ukraine Aid in c/[email protected]
[–] [email protected] 17 points 7 months ago (2 children)

That's just drawing from a special Presidential fund. I forgot the name. It is only a couple of billions in total, and must last for a year and for everything the administration wants to support without Congressional approval.

And if the $60 billion main aid package is intended for a year, then $300 million is the equivalent of less than 2 day's worth.

"A drop on a hot stone", as we say in Germany.

Fact checking: Social media users are claiming the West broke a 1990 treaty undertaking not to expand the NATO security alliance closer to Russia’s borders. It's false. in c/[email protected]
[–] [email protected] 1 points 7 months ago

They did. What the UK, the US and Russia(!) should do in case Ukraine is attacked, is to "seek immediate UN Security Council action" to provide assistance. Which the UK and the US did. Of course, that didn't achieve anything because of the veto powers of the permanent UN Security council member Russia.

Fact checking: Social media users are claiming the West broke a 1990 treaty undertaking not to expand the NATO security alliance closer to Russia’s borders. It's false. in c/[email protected]
[–] [email protected] 5 points 7 months ago (5 children)

The US and the UK were signatories to the Budapest Memorandum (all three memoranda, actually, there are similar ones with Belarus and Kazakhstan), but it was never intended as a mutual assistance treaty in the way the North Atlantic Treaty (the "NAT" part of "NATO") is. It was just an agreement to respect each other's territorial integrity and not to use weapons against each other. It literally says:

The Russian Federation, [...] reaffirm their obligation to refrain from the threat or use of force against the territorial integrity or political independence of Ukraine, and that none of their weapons will ever be used against Ukraine except in self-defense or otherwise in accordance with the Charter of the United Nations.

The cop-out clause, of course, was "except in self-defence", which is what Russia implicitly claims, when saying that its citizens in Donbas, and thus Russia itself, were under attack by Ukraine. Playing the victim has always been the preferred way to justify a war of aggression.

The part about giving up the nuclear weapons is implicit in the preamble which welcomes Ukraine to the non-proliferation treaty as a non-nuclear-weapon state.

The whole Memorandum is also really short, literally fits on a single page: https://en.wikisource.org/wiki/Ukraine._Memorandum_on_Security_Assurances

1
Yamaha SY77 split voices: Sustain-pedal to affect only one Element? (feddit.de)
 

As the title says, I am new to the Yamaha SY77, and I'm making a split voice with piano on the left and sax on the right, and I want the sustain footswitch only to affect the piano. (How) can this be done? It was trivial on the DX7 II-D with a Split-mode Performance, but I can't seem to find a setting on the SY77.

Having programmed the DX7 (II) for a long time, and having read the SY77 manual, I had no big trouble finding my way around the 77, but this one baffles me. I would consider it pretty vanilla to be able to sustain piano chords with the left hand and and then play unsustained lead lines with the right.

In most respects, real-time-controller-wise, the DX7 II seemed more flexible, even though undoubtedly the SY's synth engine is much more capable.

(Also posted to reddit, since the community is still a lot larger, but I'm willing to give lemmy a chance ...)

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Different "geometries" for same disk model? (feddit.de)
submitted 11 months ago* (last edited 11 months ago) by [email protected] to c/[email protected]
4 comments fedilink
 

I know that for decades now, hard disks don't really reveal their actual internal geometry (which is complicated anyway, since inner cylinders may have fewer sectors than outer cylinders, etc.), and present fictional geometries to satisfy legacy software, but I found it weird anyway.

I have a ZFS raidz2 NAS which originally consisted of 8x2 TB SAS disks and is now in the process of being live-upgraded to 8x4 TB (change disks one by one, resilver, change, resilver, etc ...)

I now have four of the disks replaced, and in NetBSD they all report different geometries. They all report the exact same number of total blocks, so it's not actually an issue, but still strange.

sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST4000NM0023, GE11> disk fixed

sd0: 3726 GB, 330809 cyl, 10 head, 2362 sec, 512 bytes/sect x 7814037168 sectors

sd1 at scsibus0 target 1 lun 0: <SEAGATE, ST4000NM0023, GE11> disk fixed

sd1: 3726 GB, 348145 cyl, 10 head, 2244 sec, 512 bytes/sect x 7814037168 sectors

sd3 at scsibus0 target 3 lun 0: <IBM-B040, ST4000NM0023, BC5P> disk fixed

sd3: 3726 GB, 342419 cyl, 10 head, 2282 sec, 512 bytes/sect x 7814037168 sectors

sd7 at scsibus0 target 7 lun 0: <IBM-B040, ST4000NM0023, BC5P> disk fixed

sd7: 3726 GB, 341874 cyl, 10 head, 2285 sec, 512 bytes/sect x 7814037168 sectors

Two of them are IBM-branded (although they are in fact all Seagate Constellation ES.3), so I might expect slight differences, but even those with the same branding and the same revision present different geometries.

Anyway, probably just a curiosity, it will be interesting to find what the remaining four disks will show.

I might add that the older 2 TB disks (Seagate Constalleation ES, IBM-branded) all show the exact same geometry:

sd2 at scsibus0 target 2 lun 0: <IBM-ESXS, ST32000444SS, BC2D> disk fixed

sd2: 1863 GB, 249000 cyl, 8 head, 1961 sec, 512 bytes/sect x 3907029168 sectors

sd4 at scsibus0 target 4 lun 0: <IBM-ESXS, ST32000444SS, BC2D> disk fixed

sd4: 1863 GB, 249000 cyl, 8 head, 1961 sec, 512 bytes/sect x 3907029168 sectors

sd5 at scsibus0 target 5 lun 0: <IBM-ESXS, ST32000444SS, BC2D> disk fixed

sd5: 1863 GB, 249000 cyl, 8 head, 1961 sec, 512 bytes/sect x 3907029168 sectors

sd6 at scsibus0 target 6 lun 0: <IBM-ESXS, ST32000444SS, BC2D> disk fixed

sd6: 1863 GB, 249000 cyl, 8 head, 1961 sec, 512 bytes/sect x 3907029168 sectors

3
Jeppesen Shop Down? Does anyone know why? (feddit.de)
 

Hi,

for a couple of days, now, shop.jeppesen.com (directly linked from jeppesen.com) has been down. The first days it showed a banner that it was "down due to technical issues", but since yesterday it just shows a banner saying "Jeppesen. A Boeing Company".

Is anyone else here able to reach the shop?

Is there any information about why, and how long this is going to last?

I'm quite seriously confused and bewildered that the market leader for aeronautical charts could just "close shop" like that. The only thing I could imagine that would take so long is an attack where data could have been modified, including backups, requiring manual validation of all data.

13
Dell T420 mainboard in T320? Differences? Heatsink? Air Baffle? (feddit.de)
 

I have two Dell T320 servers, which work great. But I'd like to have some more CPU power, so think about upgrading to the T420. It is almost the same, except that on the T420 main board, which seems to be otherwise the identical PCB, the second CPU socket is actually installed. (In the T320 it's just empty soldering points.) My question is: Is the air baffle the same, or do I need a new one if I swap out the main board? I am aware that I will need a second CPU heatsink.

Thanks.

5
Five hours of AvGeek Gold: The D. P. Davies Interviews with the Royal Aeronautical Society (www.aerosociety.com)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
0 comments fedilink
 

A four-part series of the interview with one of the greatest test pilots, D. P. Davies, conducted in 1992 for the Royal Aeronautical Society. Almost five hours of avgeek gold. (The other three parts should be listed at the bottom.)

D. P. Davies is also the author of the seminal work about flying large airliners, "Handling the Big Jets".

Although less well known, he is undoubtedly on the same level as Chuck Yeager and Bob Hoover.

The level of expertise and adventure, combined with the British humour and understatement, makes this immensely enjoyable to listen to, despite the less-than-perfect audio quality.

2
Flugtag Walldorf EDGX dieses Wochenende! (www.flugtag-walldorf.de)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
0 comments fedilink
 
  1. Und 27. August 2023.

Kann selbst leider nicht da sein, aber es wird bestimmt großartig mit Kunstflug, Modellflug, Fallschirmsprung, etc.

3
Flugtag in Porta Westfalica. Video! (tube.tchncs.de)
 

I finished editing the video of our aerodrome festival on August 12 and 13 this year. Enjoy and comment!

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Flugplatzfest Porta Westfalica 2023. (tube.tchncs.de)
 

Ein kurzes Video unseres Flugtags in Porta Westfalica EDVY. Gerne kommentieren und fragen.

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Möwe auf Langeoog (pixelfed.de)
 

Davon flogen so viele so tief, dass der Schnappschuss nach nur ein paar Versuchen passte.

8
Waffel-Fly-In in Leer-Papenburg EDWF (tube.tchncs.de)
 

Leider war ich nicht selbst mit dem Flugzeug da, sondern nur kurz zum Kaffeetrinken und zugucken. Aber wie immer nette Gespräche mit anderen Piloten, unter anderem mit dem Eigentümer der kleinen Morane, ein Typ, den ich auch ein paar Jahre geflogen bin.

Außerdem der Versuch, peertube etwas populärer zu machen, den youtube-"Ersatz" im Fediversum.

4
Plakat / Flyer zum Tag der offenen Tür Porta Westfalica 12. und 13. August 2023 (feddit.de)
 

Nachdem ich die Ankündigung schon vor ein paar Tagen gepostet hatte, gibt es jetzt den offiziellen Flyer.

3
"Flugtag" in Porta Westfalica on August 12 and 13 (edvy.de)
 

For anyone in the region, there are two days of exhibition, sightseeing flights for the public, aerobatic displays and information about the local clubs, food&drink, RC model planes and more.

Location is the public airfield Porta Westfalica EDVY near Hannover.

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