Hopfgeist

joined 1 year ago
MODERATOR OF
flying
sorted by: new top controversial old
How to fix my ZFS pool mistakes in c/selfhosted@lemmy.world
[–] Hopfgeist@feddit.de 0 points 5 months ago

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.

How to fix my ZFS pool mistakes in c/selfhosted@lemmy.world
[–] Hopfgeist@feddit.de 0 points 5 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/selfhosted@lemmy.world
[–] Hopfgeist@feddit.de 0 points 5 months ago (2 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 House Speaker promises to unblock aid to Ukraine but with significant changes in c/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 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/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 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/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 months ago* (last edited 6 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/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 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.

Local officials claim a UAV is responsible for an explosion at the Cherepovets Steel Mill, 800km from Ukraine. in c/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 months ago

Must have been someone smoking at work again, igniting that volatile molten steel.

The first visually confirmed loss of a "HIMARS" in c/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 months ago* (last edited 6 months ago) (1 children)

Thanks. I'm not too good with Cyrillic letters.

The first visually confirmed loss of a "HIMARS" in c/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 months ago (4 children)

Tragic, if true, but you need to work on your texts and captions. HIMARS is rocket artillery, not an "anti-aircraft missile defense system": High-Mobility Artillery Rocket System. And what is the caption in the video? PC30? BCY?

Russia Building More Dated A-50 Radar Planes Is Desperate But May Be Necessary in c/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 months ago

Saying it hasn't been built in 30 years is a bit misleading. Although the base Il-76 airframes may be that old, the latest substantial avionics upgrade (designated A-50U) is less than 15 years old or so (first delivery in 2011), which isn't too bad for military and aircraft systems. A lot of the E-3 equipment is older. That is not to say it is more capable than the E-3, it probably isn't, but I'd say a fully functioning A-50U should not be underestimated. It's even got toilets! Then again, it is also not clear to me that any "U" models are currently airworthy.

Russia Building More Dated A-50 Radar Planes Is Desperate But May Be Necessary in c/ukraine@sopuli.xyz
[–] Hopfgeist@feddit.de 0 points 6 months ago

Also, for some comedic relief, there is a "Combat Approved" episode about the A-50. "Combat approved" is a youtube channel making unbelievably (though unintentionally) funny parodies of documentaries. Everything Russian is the absolute best, the old Russian stuff is decades ahead of anything the west is currently developing, etc. The impressive thing that they can say all this with a straight face. They have lots more of these hilarious episodes, plus dozens of short clips of aircraft landing and taking off, and some live-firing exercises.

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 ...)

0
Different "geometries" for same disk model? (feddit.de)
submitted 10 months ago* (last edited 10 months ago) by Hopfgeist@feddit.de to c/selfhosted@lemmy.world
3 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

0
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.

1
Flugtag Walldorf EDGX dieses Wochenende! (www.flugtag-walldorf.de)
submitted 1 year ago* (last edited 1 year ago) by Hopfgeist@feddit.de to c/flying@feddit.de
0 comments fedilink
 
  1. Und 27. August 2023.

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

1
Flugplatzfest Porta Westfalica 2023. (tube.tchncs.de)
 

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

0
Möwe auf Langeoog (pixelfed.de)
 

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

1
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.

1
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.

1
GELÖST: siehe Kommentar. Sichtanflugkarten Deutschland in Garmin G3X Touch? (feddit.de)
submitted 1 year ago* (last edited 1 year ago) by Hopfgeist@feddit.de to c/flying@feddit.de
1 comments fedilink
 

Moin,

ich versuche auf der Garmin-Website gerade rauszufinden, ob es für das G3X Touch DFS Visual Operations Charts gibt. Explizit steht das nirgendwo. Es gibt die ICAO VFR Charts (enroute), und Garmin "Flite Chart" Instrumentananflugkarten und "Jeppesen View" für die Jeppesen-Karten, aber DFS VFR-Anflugkarten?

Ich hab alle unserere Geräte registriert, und sehe auch alle Angebote zu den einzelnen Datenbanken und Bundles, sehe aber nichts zu den VFR-Karten (außer wie gesagt enroute ICAO-Charts).

Hat jemand hier auch eine G3X Touch-Installation und nutzt solche Karten auf dem Gerät, oder weiß, ob's die gibt? Das wäre hilfreich zu wissen. Ich hab derweil auch schon direkt bei Garmin angefragt.

0
Android Auto won't connect: OnePlus 8T, LineageOS 20 (feddit.de)
 

We have several phones in our family, and all connect just fine, but not the 8T. Two of the working phones are OnePlus 6T on the same LineageOS version. Are there known problems specifically with the 8T?

The phone charges fine when connected to the car, but the car does not recognize an android auto-capable phone. With the other phones, the AA icon appears instantly on the car screen, but nothing happens with the 8T. We upgraded to the latest lineageos build and tried different cables but no change.

The car is a 2019 Peugeot 5008 II, if that matters.

1
Schnurgerade. Moderne Autopiloten sind großartig! (feddit.de)
submitted 1 year ago* (last edited 1 year ago) by Hopfgeist@feddit.de to c/flying@feddit.de
6 comments fedilink
 

Die von SkyDemon aufgezeichnete Flugroute unseres gestrigen Aus-Flugs von Porta Westfalica nach Rendsburg/Schachtholm. Der voll gekoppelte Autopilot GFC 500, vom Flugplan im G3X Touch gesteuert, zieht die Bahn wie mit dem Lineal gezogen.

Ich fliege auf Rundflügen total gern selbst, aber auf Streckenflügen, wo auch das Ankommen wichtig ist, erleichtert ein guter Autopilot die Sache, und es bleibt mehr Zeit die Landschaft zu genießen. Immer ein Ohr am Funk, und regelmäßiger Blick auf die Instrumente bleiben selbstverständlich.

Fliegt ihr lieber von Hand, oder mit Autopilot, oder seid ihr wie ich in der Gruppe "kommt drauf an"?

1
Dümmer-Rundflug ab Porta Westfalica mit der PA-28-161 "Cadet" (tube.tchncs.de)
submitted 1 year ago* (last edited 1 year ago) by Hopfgeist@feddit.de to c/flying@feddit.de
0 comments fedilink
 

Ein Rundflug mit einer jungen Familie, die Omas Haus, ihr neues Zuhause und ihren Liebliengs-Ausflugs-See mal von oben sehen wollten.

view more: next ›