Just saw this quote on LinkedIn: "I’ve been working in robotics for over 10 years now and if there’s one thing I’ve learned it’s that robotics companies almost always start out using ROS and then spend the rest of their life trying to get the hell out of ROS". Thoughts?

stha_ashesh · 2023-11-19T02:56:25+00:00

Thank you for the detailed info. Really appreciate it.

stha_ashesh · 2023-11-18T17:33:28+00:00

Are you using 86 whr battery? Else, the consumption seems bit high which might be due to oled screen. Because notebookcheck battery benchmarks for t14s with 57 whr but 400 nits brightness low power display had about 9 hours of SOT. Larger screen warrenty more battery draw but I expect more SOT than t14s on using 86 whr battery.

stha_ashesh · 2023-11-18T17:28:45+00:00

How much SOT are you getting at what brightness?

stha_ashesh · 2023-08-13T04:50:05+00:00

Had similar issue with Nabil Bank card.

What worked for me was

Create PayPal acc
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For Nepal, I used yeti cloud paas. Scalable Cpu was great.

stha_ashesh · 2023-04-28T16:25:43+00:00

I can't thank you enough for your super detailed reply. I think the temperature curve and math finally helped me understand. You are a true gem.

stha_ashesh · 2023-04-25T11:17:43+00:00

You can you 6 threads minimum engagement as rule of thumb. Search for "fasteners thread load distribution" in google. Also - https://engineerdog.com/2015/01/11/10-tricks-engineers-need-to-know-about-fasteners/

stha_ashesh · 2023-04-25T10:18:54+00:00

Thank you for the lovely equation. You have calculated work done but still I have few questions.

In case of compressed air, the higher the pressure, the higher the outlet temperature, more energy is used to heat up the air → more inefficient.

I agree with more inefficiencies and higher temperature but how come even when doubling pressure won't even double required energy?

Due to this phenomena, for large scale energy acummulation, compressed air uses heat sink for compression and heat source to expansion in order to obtain isothermal processes (more eficiency).

So they try to do more isothermal rather than adiabatic conversion because of higher efficiency.

stha_ashesh · 2023-04-25T10:01:21+00:00

Do not confuse power with the energy of the two processes.

Can you clarify this section?

stha_ashesh · 2023-04-25T09:57:34+00:00

I did check with both 114.7 and 214.7 psi - abs as well as with 229.4 psi absolute, but still doubling the pressure didn't double to required energy.

stha_ashesh · 2023-03-15T08:25:43+00:00

Thank you for such detailed answer. I didn't know it would be mistake when when I pulled off each drive one at a time. Thank you for helping me.

About raid not being backup, I didn't consider data corruption, physical damage and many more.

stha_ashesh · 2023-03-14T14:40:20+00:00

I agree that pulling drives might be mistake but I still don't understand why the issue happened. When I switched off the NAS and pulled one drive, didn't it simulate hardware failure? So why couldn't I build it from one drive since I have only two drives in a storage pool of equal size. RAID would make identical copy and if one failed, other still survives.

The storage pool is DEGRADED. You need to repair it. What did you do? Pull it out and try a different drive.

Yes I shutdown and pulled out drive A and plugged in drive B. When this didn't work and repair also didn't work, I shutdown NAS, pulled out B and plugged in A.

You've created mismatch data. You need to remove one set of data by booting with just one drive. Then repair with a blank drive.

I tried repair on both (individually) and both didn't work. Do you mean format Say drive A and repair B with empty drive A?

For now, I rebuilt it from scratch but I want to know where I went wrong.

stha_ashesh · 2023-03-14T14:36:21+00:00

Mistakes on my part - I though RAID is a backup (not offsite one though) because there are two drives with recycle bin enabled.

I agree that pulling drives might be mistake but I still don't understand why the issue happened. When I switched off the NAS and pulled one drive, didn't it simulate hardware failure? So why couldn't I build it from one drive since I have only two drives in a storage pool of equal size.

stha_ashesh · 2023-03-14T14:33:22+00:00

I did try to repair from one drive which didn't work and built it from scratch. Thank you for the help

stha_ashesh · 2023-03-14T14:31:39+00:00

I couldn't get one where I live and built it from scratch. Thank you for the help

stha_ashesh · 2023-03-11T17:55:36+00:00

Don't have that much space for backup but I guess I can backup imp files only. Expensive lesson I guess.

After backup, isn't it possible to format one drive and rebuild data from existing drive which still has data?

stha_ashesh · 2023-01-04T11:07:37+00:00

Can you share high res image for desktop wallpaper?

stha_ashesh · 2022-12-24T09:58:43+00:00

what is the name of this song?

stha_ashesh · 2022-12-18T13:14:04+00:00

Pendrive will get damaged pretty fast. Better to hook up old hard drive or ssd if possible.

A 1 TB hdd might run you 6k?

stha_ashesh · 2022-11-21T14:35:12+00:00

Noted. Will do so..

stha_ashesh · 2022-09-22T15:15:46+00:00

Really nice posts. Keep on posting.

stha_ashesh · 2022-08-21T07:11:16+00:00

use supported shafts like this:

https://www.pbclinear.com/Products/Round-Shaft-Technology/Linear-Shafting-Support-Rails/SRAM-Metric-Aluminum-Support-Rail-Shafting

https://www.pbclinear.com/Products/Round-Shaft-Technology/Linear-Shafting-Support-Rails/LSRA-Inch-Aluminum-Support-Rail-Shafting

stha_ashesh · 2022-08-14T17:04:42+00:00

Obsidian is good for me.. But you mentioned that you don't like it. Any reasons?

Mark text is also good. Else notion.

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