Re: Busybox 1.4.2 tftp: read error: Input/output error
Am 16.02.2017 um 11:08 schrieb Vesta: I managed successfully download the other MTD files via tftp, some of them larger in size than mtdblock6 "RootFileSystem". mtdblock6 size is near 4,3MB The downloading is over the wan network, not via local net. In general, embedded CPU is weak and Busybox implementation with limited functions (no gzip, etc) I've never been successful with using netcat on Busybox, only tftp worked. After running nc command it just stay forever, zero-size file been created on PC and it never got actual bytes. Netcat transfer can used in different ways, perhaps there is command variant that might work better in this particular case? Please specify netcat commamnd that can work in this situation, on transmit side and receive side. Just tried on a live linux that has busybox on board, this would be your embedded device: dd if=/dev/sr0 | nc -l -p 3456 On the receiver side (PC?) to retrieve the image: nc 10.76.23.81 3456 > test.img Yours, Mattias -- Mattias Schlenker - Freier IT-Fachredakteur und -autor redakt...@mattiasschlenker.de Mattias Schlenker - IT-Consulting, Softwareentwicklung consult...@mattiasschlenker.de Address__ August-Bebel-Str. 74 - D-04275 LEIPZIG - GERMANY Phone: +49 341 39290767 Fax: +49 341 30393578 Mobile: +49 163 6953657 Another mobile: +49 159 03160327 VATIN_ DE240998538 Fork me! https://github.com/mschlenker Website.__ http://www.mattiasschlenker.de/ My books!___ http://www.arduino-hausautomation.de/ ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
Re: Busybox 1.4.2 tftp: read error: Input/output error
I managed successfully download the other MTD files via tftp, some of them larger in size than mtdblock6 "RootFileSystem". mtdblock6 size is near 4,3MB The downloading is over the wan network, not via local net. In general, embedded CPU is weak and Busybox implementation with limited functions (no gzip, etc) I've never been successful with using netcat on Busybox, only tftp worked. After running nc command it just stay forever, zero-size file been created on PC and it never got actual bytes. Netcat transfer can used in different ways, perhaps there is command variant that might work better in this particular case? Please specify netcat commamnd that can work in this situation, on transmit side and receive side. SSH not implemented on an embedded device. Best Regards, Alex > Sent: Thursday, February 16, 2017 at 11:06 AM > From: "Mattias Schlenker" <m...@mattiasschlenker.de> > To: busybox@busybox.net > Subject: Re: Busybox 1.4.2 tftp: read error: Input/output error > > > > Am 16.02.2017 um 09:57 schrieb Vesta: > > Hi, > > > > BusyBox v1.4.2 on an embedded device running Linux v2.6.18. > > > > I tried to download mtdblock6 "RootFileSystem" MTD partition via tftp, but > > at the very end, transfer every time ended with error tftp: read error: > > Input/output error. > > This way you just download the device file, not the block device > represented by the device file. Use netcat/nc or a SSH tunnel in > combination with dd to create an image of the block device on the fly. > Imaging with dd also works whan mounted, but might result in corruption > of the image (usually no bad corruption since most devices with simple > flash keep writes low) when mounted read-write. > > Yours, > Mattias > > > > > > /proc/mtd > > dev: size erasesize name > > ... > > mtd6: 00416800 0001 "RootFileSystem" > > > > brw-rw 1 0 0 31, 6 mtdblock6 > > > > Is there way to solve this issue? Does it possible unmount RootFileSystem > > MTD partition without rebooting and dropping network connection? Busybox > > commands is limited by defined functions only. > > ___ > > busybox mailing list > > busybox@busybox.net > > http://lists.busybox.net/mailman/listinfo/busybox > > -- > Mattias Schlenker - Freier IT-Fachredakteur und -autor > redakt...@mattiasschlenker.de > Mattias Schlenker - IT-Consulting, Softwareentwicklung > consult...@mattiasschlenker.de > > Address__ August-Bebel-Str. 74 - D-04275 LEIPZIG - GERMANY > Phone: +49 341 39290767 Fax: +49 341 30393578 > Mobile: +49 163 6953657 Another mobile: +49 159 03160327 > VATIN_ DE240998538 > > Fork me! https://github.com/mschlenker > Website.__ http://www.mattiasschlenker.de/ > My books!___ http://www.arduino-hausautomation.de/ > > ___ > busybox mailing list > busybox@busybox.net > http://lists.busybox.net/mailman/listinfo/busybox > ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
Re: Busybox 1.4.2 tftp: read error: Input/output error
Am 16.02.2017 um 09:57 schrieb Vesta: Hi, BusyBox v1.4.2 on an embedded device running Linux v2.6.18. I tried to download mtdblock6 "RootFileSystem" MTD partition via tftp, but at the very end, transfer every time ended with error tftp: read error: Input/output error. This way you just download the device file, not the block device represented by the device file. Use netcat/nc or a SSH tunnel in combination with dd to create an image of the block device on the fly. Imaging with dd also works whan mounted, but might result in corruption of the image (usually no bad corruption since most devices with simple flash keep writes low) when mounted read-write. Yours, Mattias /proc/mtd dev:size erasesize name ... mtd6: 00416800 0001 "RootFileSystem" brw-rw1 00 31, 6 mtdblock6 Is there way to solve this issue? Does it possible unmount RootFileSystem MTD partition without rebooting and dropping network connection? Busybox commands is limited by defined functions only. ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox -- Mattias Schlenker - Freier IT-Fachredakteur und -autor redakt...@mattiasschlenker.de Mattias Schlenker - IT-Consulting, Softwareentwicklung consult...@mattiasschlenker.de Address__ August-Bebel-Str. 74 - D-04275 LEIPZIG - GERMANY Phone: +49 341 39290767 Fax: +49 341 30393578 Mobile: +49 163 6953657 Another mobile: +49 159 03160327 VATIN_ DE240998538 Fork me! https://github.com/mschlenker Website.__ http://www.mattiasschlenker.de/ My books!___ http://www.arduino-hausautomation.de/ ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
