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by jerrm
Thu Aug 01, 2019 4:04 pm
Forum: Beginners
Topic: backing up a 1TB USB drive raspberry pi
Replies: 6
Views: 352

Re: backing up a 1TB USB drive raspberry pi

How are you backing up the 1TB drive now? Do you really need an image backup?
by jerrm
Thu Aug 01, 2019 3:34 pm
Forum: General discussion
Topic: NVMe Enclosures
Replies: 6
Views: 357

Re: NVMe Enclosures

It's primarily USB3 interference. Could be multiple issues impacting the difference between the two drives. The HDD itself is less noisy than the SDD, enclosure/cable is better shielded than the SDD, the lower HDD throughput isn't generating as much interference, the chip in the SDD adapter is less ...
by jerrm
Wed Jul 31, 2019 11:33 pm
Forum: General discussion
Topic: 4gb - 4B Demand must be high.
Replies: 134
Views: 8953

Re: 4gb - 4B Demand must be high.

Yes and no... I ordered my first Pi4B from a UK supplier on what was Sunday evening where I live, and Monday morning of launch day in the UK. It was in stock and shipped promptly. The big problem for the US, as it has been explained, is that they can't be shipped into the US until the FCC paperwork...
by jerrm
Wed Jul 31, 2019 8:11 pm
Forum: Networking and servers
Topic: SSH on External IP -- how to
Replies: 12
Views: 489

Re: SSH on External IP -- how to

Make sure the password is good and strong, or better yet, use key files.
by jerrm
Wed Jul 31, 2019 8:02 pm
Forum: Troubleshooting
Topic: RaspberryPi 4 as access point BRIDGE not working
Replies: 28
Views: 2135

Re: RaspberryPi 4 as access point BRIDGE not working

That last part is undeniable. But I am no so sure about the first: routed works all the time, bridging does not (e.g. wifi client uplink)7 The guide as posted won't work with the pi as a wifi client anyway. I've never seen any situation where the Pi as a wired access point fails. Double NAT and sep...
by jerrm
Wed Jul 31, 2019 7:03 pm
Forum: General discussion
Topic: 4gb - 4B Demand must be high.
Replies: 134
Views: 8953

Re: 4gb - 4B Demand must be high.

it just seems to me something strategic is going on. with 2gig and 4gig versions available it would be hard to buy a 1 gig version. Same at my Micro Center. 1GB boards have been almost always in stock. But no 2GB/4GB boards. I managed to grab a 2GB board early on, but I don't think my store has had...
by jerrm
Wed Jul 31, 2019 3:09 pm
Forum: Networking and servers
Topic: SSH on External IP -- how to
Replies: 12
Views: 489

Re: SSH on External IP -- how to

Browsers generally don't speak ssh. Use putty or other ssh client from outside just as you would from inside.
by jerrm
Wed Jul 31, 2019 3:01 pm
Forum: Troubleshooting
Topic: RaspberryPi 4 as access point BRIDGE not working
Replies: 28
Views: 2135

Re: RaspberryPi 4 as access point BRIDGE not working

EDIT. An since I am more of less specialized into doing the exegesis of that document to newcomers, here are the things that should be improved according to my experience: 1) Make 2 documents. The configs are not compatible. People get confused and mix both parts of the document. 2) Open with a pic...
by jerrm
Mon Jul 29, 2019 10:13 pm
Forum: Troubleshooting
Topic: External USB3 drive slows down during transfer
Replies: 11
Views: 399

Re: External USB3 drive slows down during transfer

Have you tried disabling UAS following the Sticky? https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=245931 UAS support has always been quirky(pun intended) under Linux, but the Pi seems to have additional problems. I have a tried and true adapter that is a workhorse in several Linux PC instal...
by jerrm
Sun Jul 28, 2019 2:19 am
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 59
Views: 30544

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

Has any anyone found a USB3 to SATA adapter for the Pi4 that works with UASP and TRIM support? I had assumed the UAS issues mentioned here were of the normal Linux variety, but at least part of it appears Pi4 specific. My go to adapter (JMS578 based) for Linux works great under PC Debian Buster (and...
by jerrm
Sat Jul 27, 2019 2:24 am
Forum: Raspbian
Topic: Thank you for basing on Debian :) !
Replies: 6
Views: 564

Re: Thank you for basing on Debian :) !

Raspbian Jessie will run on a 3B / 2B v1.2 (BCM2837) IF it is updated on an earlier RPi model utilising rpi-update to grab newer kernel / firmware... Not quite. The 3B+ is the first "stretch required" board. Jessie does NOT need rpi-update for the 3B . The 3B was released during the Jessie period. ...
by jerrm
Thu Jul 25, 2019 3:50 pm
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 59
Views: 30544

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

Now my questions... It seems that the problem is with the SSD itself and the fix blacklists the USB3/SATA adapter, right? That means that if I use a different adapter for this SSD I will need to change the vendor:device ID in /boot/cmdline.txt. Likewise if I connect a different SSD to this adapter,...
by jerrm
Tue Jul 23, 2019 7:07 pm
Forum: General discussion
Topic: RPI4 and ADATA SD700
Replies: 4
Views: 476

Re: RPI4 and ADATA SD700

Would be curious what it does on a Debian buster PC to see if it Linux in general or something pi specific.

USB 3 drive support under Linux is a mess in general, so that would be my first guess, but could be the pi.
by jerrm
Tue Jul 23, 2019 3:30 pm
Forum: General discussion
Topic: RPI4 and ADATA SD700
Replies: 4
Views: 476

Re: RPI4 and ADATA SD700

UAS is most likely broken for that controller. You can probably still use the drive, but at crippled speeds. Have you tried the steps outlined in the sticky?

https://www.raspberrypi.org/forums/view ... 8&t=245931
by jerrm
Mon Jul 22, 2019 9:17 pm
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 59
Views: 30544

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

USB 3 drive support in Linux is a mess. Compounded by the fact that many manufacturers change underlying chipsets without changing part numbers. The adapter bought last month may not be the same as the same part number bought today. The foundation ought to look at an official Pi adapter or Pi Certif...
by jerrm
Mon Jul 22, 2019 2:36 pm
Forum: Troubleshooting
Topic: 1 of 6 Pis Not Booting
Replies: 5
Views: 238

Re: 1 of 6 Pis Not Booting

I assume you've tried the obvious things like trying a known good power supply and SD card from a working Pi in the "problem" Pi?

If so, my guess is it's just a bad unit.

Bad Pis do happen. We've had Pis that wouldn't boot, failed memory tests, ran too hot, etc.
by jerrm
Thu Jul 18, 2019 3:35 pm
Forum: Troubleshooting
Topic: PI4 USB Boot
Replies: 20
Views: 5445

Re: PI4 USB Boot

You are right, I checked with blkid and seen that when I resize the partition, the PUUID changes... I updated cmdline.txt but I'm now getting bunch or error on reboot. Previously it was just stuck when booting now it goes into emergency mode but it's locked due to root account locked. I think I wil...
by jerrm
Wed Jul 17, 2019 7:47 pm
Forum: Troubleshooting
Topic: PI4 USB Boot
Replies: 20
Views: 5445

Re: PI4 USB Boot

OK I tried a second time from scratch ( just reimaged the usb drive) and kept the boot partition on the usb drive. Edited the fstab file, changed the uuid from the USB one to the SD one. It worked, confirmed by changing the splash setting using the raspberry configuration tool. But then I wanted to...
by jerrm
Sun Jul 14, 2019 5:25 pm
Forum: Advanced users
Topic: Pi 4B: question on OpenVPN performance or speed [RESULTS]
Replies: 28
Views: 6683

Re: Pi 4B: question on OpenVPN performance or speed [RESULTS]

Just to be sure, I'm assuming this is all wired ethernet without the vagaries wireless. Since the 3+ appears cpu bound, I would have expected the 4 to give some improvement even if it didn't reach the same level as the PC. I'd be curious of a Linux PC's performance vs Windows. It wouldn't surprise m...
by jerrm
Sat Jul 13, 2019 5:50 am
Forum: General discussion
Topic: will QuickCharge 3.0 5V/3A work on pi 4?
Replies: 9
Views: 1555

Re: will QuickCharge 3.0 5V/3A work on pi 4?

i am planning to buy a pi 4. but i want to know if quickcharge 3.0 5V/3A works on pi 4? otherwise, i need to buy the official power supply. The answer to your question is yes. QC3 chargers work fine for the Pi4. As with anything, quality matters, beware knockoffs. We've tested several supplies and ...
by jerrm
Fri Jul 12, 2019 6:40 pm
Forum: Advanced users
Topic: Pi 4B: question on OpenVPN performance or speed [RESULTS]
Replies: 28
Views: 6683

Re: Pi 4B: question on OpenVPN performance or speed [RESULTS]

It doesn't appear the Pi is the bottleneck?

Does the vpn provider claim any sort of top speed? Maybe 60mpbs is all their giving. What are the results from a traditional PC?
by jerrm
Thu Jul 11, 2019 2:25 pm
Forum: Networking and servers
Topic: How can I update from PHP 7.0 to PHP 7.1?
Replies: 10
Views: 2064

Re: How can I update from PHP 7.0 to PHP 7.1?

The sury.org packages listed in the above ayesh.me link should work. He has 7.1, 7.2. & 7.3 packages targeted for stretch. Follow the Debian instructions, not the ubuntu, don't fret that there is no "Raspbian" target, the debian armhf packages work on Raspbian. I use the sury.org packages on Raspbian.
by jerrm
Thu Jul 11, 2019 3:54 am
Forum: Beginners
Topic: how to Wifi to Ethernet Bridge
Replies: 2
Views: 380

Re: how to Wifi to Ethernet Bridge

It's actually pretty simple to setup what is functionally a transparent wireless client to ethernet bridge with what OpenWRT calls a "pseudo-bridge." Their relayd utility does all the heavy work. If this is the Pi's primary job, go to OpenWRT and grab their Pi image. If you need the Pi for other use...
by jerrm
Wed Jul 10, 2019 2:15 pm
Forum: Networking and servers
Topic: How to block a domain name?
Replies: 7
Views: 594

Re: How to block a domain name?

There are many ways an app can get around dns based blocking. None of this works if the client app is using anything other than traditional dns on port 53 for name resolution. Also if phones, they could fall back to mobile data, I assume you have that turned off. If below doesn't work then you will ...
by jerrm
Wed Jul 10, 2019 2:00 pm
Forum: Networking and servers
Topic: How to block a domain name?
Replies: 7
Views: 594

Re: How to block a domain name?

DougieLawson wrote:
Wed Jul 10, 2019 6:54 am
Use https://pi-hole.net/ to blacklist those sites like you would for an advertiser's web pages.
pihole is just dns blocking - same thing he is trying. Doing it on the pihole vs dnsmasq directly on the pi router won't make a difference.

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