Go to advanced search

by rew
Fri May 29, 2020 9:06 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 615

Re: Driver for ZJ9200 Label printer.

FYI: On the Dymo 450 labelprinter, I found a setting that helped print jobs more quickly after eachother. It was something like: printer-is-write-only, cupsd was waiting for the printer to say something back and that would cause a 5s wait after each job. This makes a difference when you print severa...
by rew
Fri May 22, 2020 9:40 am
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 615

Re: Driver for ZJ9200 Label printer.

Still.... I think the printer is expecting some more data that the previous job didn't send. Maybe the driver crashes after sending most of the data, but with some data still buffered causing a reasonable print, but the firmware is still expecting a few more bytes. (odd that it would still print, bu...
by rew
Wed May 20, 2020 7:10 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 615

Re: Driver for ZJ9200 Label printer.

While getting my '9200 to print.... I made a mistake of sending: "you'll get XXX bytes of binary data starting <now>" , but the XXX was much more than what was actually sent. In my case, it took me a while before I understood why nothing was happening anymore. From your description it sounds to me t...
by rew
Wed May 20, 2020 5:23 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 615

Re: Driver for ZJ9200 Label printer.

Oh... I discarded that route as the test-print I found in my printer when I got it mentioned "TSPL" and the ZJ-58 driver does not produce something that resembles TSPL..... It seems that writing the driver isn't too much of a problem after all: Done! Not a cups-driver yet, I might try that ZJ-58 dri...
by rew
Wed May 20, 2020 2:58 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 615

Re: Driver for ZJ9200 Label printer.

Well.... Yeah, I know they might think of Linux support as supplying an x86 binary being sufficient Linux support. In this case, I'm being pushed to try if the APK works. (I told him: "won't work, that's for android", then I get please try anyway...) Anyway, with an X86 binary I might still be able ...
by rew
Wed May 20, 2020 10:51 am
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 615

Driver for ZJ9200 Label printer.

Hi all, hope you're all well in these difficult times. I've bought a 100mm labelprinter on Aliexpress where the seller confidently told me there was Linux support for his printer. All the others were a bit vague. So I went with this one. So now I seem to have a $90 paperweight..... The printer seems...
by rew
Sat Feb 29, 2020 10:16 am
Forum: General discussion
Topic: Stability of raspberry pi with big disks.
Replies: 6
Views: 616

Re: Stability of raspberry pi with big disks.

What errors are you seeing? Any error messages? What happens to the disks? Usually the system just hangs. (I get an "host unreachable" from the cronjob trying to ssh into the machine to do a "df"). Or "no IO happening anymore": I can still log in, but everything accessing the disks is dead. When I ...
by rew
Thu Feb 27, 2020 2:23 pm
Forum: General discussion
Topic: Stability of raspberry pi with big disks.
Replies: 6
Views: 616

Stability of raspberry pi with big disks.

Hi, I decided that I needed a lot of "slow" storage and thought the new raspberry pi 4 would make a nice fileserver with decent performance for "slow" storage. Stuff like 200Mb/sec is not bad. I've been messing with this for half a year now. but it has proven to be impossible to get to work reliable...
by rew
Thu Feb 27, 2020 11:55 am
Forum: General discussion
Topic: Undervoltage RasberryPi won't boot
Replies: 5
Views: 326

Re: Undervoltage RasberryPi won't boot

Well... The arduino doesn't matter much. Expect about 20mA for that one.
by rew
Tue Feb 04, 2020 5:27 pm
Forum: Advanced users
Topic: Restricting Linux to say 3 cores.
Replies: 3
Views: 583

Restricting Linux to say 3 cores.

Hi, I'm building a system where I'm probably going to use a raspberry pi and a pi camera to process some images.... On the other hand, there are some real-time things that need to happen. The current plan is to use an STM32 for the real-time stuff (stepper motors e.d.). I was wondering. would it be ...
by rew
Mon Nov 04, 2019 10:38 am
Forum: Troubleshooting
Topic: PI4 crashes with USB3 connected hub.
Replies: 4
Views: 773

Re: PI4 crashes with USB3 connected hub.

did you have a look at this post? https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=53832 Nope. It tells me to upgrade to the 2014 version of NOOBS..... Sounds outdated. And I've determined that it is related to USB3 being used. I've read it anyway, and found nothing relevant. Doing the apt u...
by rew
Mon Nov 04, 2019 7:57 am
Forum: Troubleshooting
Topic: PI4 crashes with USB3 connected hub.
Replies: 4
Views: 773

PI4 crashes with USB3 connected hub.

I have a Pi4 running Ubuntu. I need the 64-bit kernel. I have 5 USB harddisks doing software raid5. As the pi doesn't have five USB3 ports, I use an USB3 HUB and one direct connection. Each of the five drives has its own 12V powersupply. The system has been very unstable.... Until two weeks ago, it ...
by rew
Fri Jul 05, 2019 9:14 am
Forum: Raspberry Pi OS
Topic: 64-bit kernel (option?)
Replies: 6
Views: 970

Re: 64-bit kernel (option?)

Although "having speed" is also important for a big storage module, some applications can use storage with a speed between the old-fashioned "tape" and "modern, quick harddrive". The way I understand it is that "raspbian-management" has decided against moving raspbian to 64-bit. I respect that choic...
by rew
Thu Jul 04, 2019 2:57 pm
Forum: Raspberry Pi OS
Topic: 64-bit kernel (option?)
Replies: 6
Views: 970

Re: 64-bit kernel (option?)

I have another pi, What are you suggesting I do with that? If I split my drives across two raspberries, the overhead of RAID5 (now 20%) will go up (40%). But the whole idea is to have a BIG space where I can store stuff I don't need often, but in one place so that I don't' have to move data between ...
by rew
Thu Jul 04, 2019 12:52 pm
Forum: Raspberry Pi OS
Topic: 64-bit kernel (option?)
Replies: 6
Views: 970

64-bit kernel (option?)

To handle a bunch of "big-slow" storage I have decided that hte PI4 is "up to the job". At 200MB/sec disk IO and maybe 30-50 MB/sec for ethernet, it isn't even all that slow. For this I really need a 64-bit kernel: It seems 32-bit kernels do not play nice above 16T of storage. My main file-server he...
by rew
Wed Jul 03, 2019 7:25 pm
Forum: General discussion
Topic: Recommended filesystem for large partition?
Replies: 8
Views: 1380

Re: Recommended filesystem for large partition?

Got the pi-3 up-and-running. XFS. Zfs didn't have kernel-support installed. The bottleneck in copying the data from the old location seems to be the 100mbps ethernet. The disks are plenty-fast at 20Mbyte per second compared to that.... I expect the pi-4 Ubuntu support will be available before the rs...
by rew
Wed Jul 03, 2019 6:39 pm
Forum: General discussion
Topic: Recommended filesystem for large partition?
Replies: 8
Views: 1380

Re: Recommended filesystem for large partition?

I pulled a RPI-3 out of the closet. So now I'm going to have 32Tb of storage connected through a 30Mbyte/sec USB2 connection....

The foundation seems to have made a conscious choice not to go 64-bits. So I'm not expecting them to "fix" that soon. I would hope that Ubuntu will go pi-4 soon-ish?
by rew
Wed Jul 03, 2019 5:32 pm
Forum: General discussion
Topic: Recommended filesystem for large partition?
Replies: 8
Views: 1380

Re: Recommended filesystem for large partition?

Yeah. It seems that md allows a unit this large, but everything else needs less than 16Tb. It took me a while to start to grok all the 16 Tibibybytes in the documentation. I bough 8TB drives, I have a 32TB Anway. Enough rant. I tried partitioning the drive with GPT into two halves. That dosn't work....
by rew
Wed Jul 03, 2019 4:59 pm
Forum: General discussion
Topic: Recommended filesystem for large partition?
Replies: 8
Views: 1380

Recommended filesystem for large partition?

Hi, I've created a big raid5 disk on my new pi 4. anticlimax:/home/wolff# cat /proc/mdstat md0 : active raid5 sde1[5] sdd1[3] sdc1[2] sdb1[1] sda1[0] 31255572480 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/5] [UUUUU] [/code when I run: ] [code]mkfs.ext4 /dev/md4 it reports: Attempt to read ...
by rew
Tue May 07, 2019 3:41 pm
Forum: Compute Module
Topic: Two LAN9514 chips on one raspberry.
Replies: 5
Views: 1317

Re: Two LAN9514 chips on one raspberry.

Yes. I need the lan ports and get the "hub" part for free. I could've maybe tried another USB-lan chip, but 1) this one works on the raspberry 2) I need at least one hub anyway. (I would've gotten by with a bare usb-ethernet chip and a LAN9512, but the complexity of two different chips is not worth ...
by rew
Sun May 05, 2019 12:23 pm
Forum: General discussion
Topic: Seeking suggestions on reusing an old tablet touch screen
Replies: 7
Views: 1530

Re: Seeking suggestions on reusing an old tablet touch screen

There are very many different possible screen interface specifications. The chip on the raspberry pi can do a few of them and many screens will support one or two. The chances that those will match are slim. When a phone or tablet manufacturer designs a new phone-or-tablet, they will search the poss...
by rew
Sun May 05, 2019 12:16 pm
Forum: Compute Module
Topic: Two LAN9514 chips on one raspberry.
Replies: 5
Views: 1317

Two LAN9514 chips on one raspberry.

I have a project where one Compute module (CM3) gets connected to two LAN9514 chips for Ethernet connectivity. It seems that the raspberry pi uses the last 3 bytes of its serial number for the MAC on the LAN chips. That's all nice if you have one of them, but I'd say it is not allowed when there are...
by rew
Fri Dec 28, 2018 5:18 pm
Forum: Graphics, sound and multimedia
Topic: Is Openscad ported to Raspbian Stretch?
Replies: 20
Views: 8185

Re: Is Openscad ported to Raspbian Stretch?

that I had was with finding the repository file 'libqscintilla2_qt4.so.13'. This was what his compiled copy of openscad was asking for. We found the file 'libqscintilla2_qt4.so.13.1.1', but as I said, that is not what the compiled openscad was asking for. Ah! But that one is easy if you know how th...
by rew
Wed Dec 19, 2018 2:10 pm
Forum: General discussion
Topic: pi one still supported?
Replies: 17
Views: 2197

Re: pi one still supported?

Yes, I buy the Micro SD cards with adapter. So I now have plenty of adapters around to put the microSD into the original pi. The goal is to have my scanner connected and I had just hooked that up when the troubles started. Maybe the printer is outputting 12V on the VUSB? Nope. 0V. And the scanner is...
by rew
Tue Dec 18, 2018 6:12 pm
Forum: General discussion
Topic: pi one still supported?
Replies: 17
Views: 2197

pi one still supported?

Hi, Is the original PI still supported? I need a "linux computer with USB and ethernet" and even a PI one would be overkill. So I thought I'd use the old pi that is collecting dust somewhere for this application, but somewhere in the process it suddenly died. And I got another pi one from the pile a...

Go to advanced search