完善资料让更多小伙伴认识你,还能领取20积分哦, 立即完善>
在 wrtnode2r 系统中,可以查看 /proc/mtd ,查看flash的分区情况
root@OpenWrt:/# cat /proc/mtd dev: size erasesize name mtd0: 00030000 00010000 "u-boot" mtd1: 00010000 00010000 "u-boot-env" mtd2: 00010000 00010000 "factory" mtd3: 01fb0000 00010000 "firmware" mtd4: 001172c6 00010000 "kernel" mtd5: 01e98d3a 00010000 "rootfs" mtd6: 01c20000 00010000 "rootfs_data" 如果要备份的分区比较大,可以把固件备份到 内存挂载点 tmp 目录下,使用 df -h命令查看挂载情况 root@OpenWrt:/# df -h Filesystem Size Used Available Use% Mounted on rootfs 28.1M 3.3M 24.8M 12% / /dev/root 2.5M 2.5M 0 100% /rom tmpfs 125.2M 76.0K 125.1M 0% /tmp /dev/mtdblock6 28.1M 3.3M 24.8M 12% /overlay overlayfs:/overlay 28.1M 3.3M 24.8M 12% / tmpfs 512.0K 0 512.0K 0% /dev 有125.2 M,足够保存整个 flash 的所有文件。 so, here we go: 1、把 Flash 的所有 mtd 分区(mtd0)(复制到内存的/tmp下, root@OpenWrt:/mnt/cgi-bin# dd if=/dev/mtd0 of=/tmp/sysupgrade_.bin 64896+0 records in 64896+0 records out root@OpenWrt:/# 到 /tmp目录查看,可以看到已经复制到tmp目录下~ 2. 同理,要把 固件的art 分区保存起来,则输入: root@OpenWrt:/# dd if=/dev/mtd2 of=/tmp/art.bin 128+0 records in 128+0 records out 到 /tmp目录查看,可以看到已经复制到tmp目录下~ 3.保存备份,推荐使用tftp,不过需要你的wrtnode2r 有安装tftp root@OpenWrt:/mnt/cgi-bin# tftp -pl /tmp/sysupgrade.bin remote_ip 4. man dd root@OpenWrt:/mnt/cgi-bin# man dd DD(1) User Commands DD(1) NAME dd - convert and copy a file SYNOPSIS dd [OPERAND]... dd OPtiON DESCRIPTION Copy a file, converting and formatting according to the operands. bs=BYTES read and write up to BYTES bytes at a time cbs=BYTES convert BYTES bytes at a time conv=CONVS convert the file as per the comma separated symbol list count=N copy only N input blocks ibs=BYTES read up to BYTES bytes at a time (default: 512) if=FILE read from FILE instead of stdin iflag=FLAGS read as per the comma separated symbol list obs=BYTES write BYTES bytes at a time (default: 512) of=FILE write to FILE instead of stdout oflag=FLAGS write as per the comma separated symbol list seek=N skip N obs-sized blocks at start of output skip=N skip N ibs-sized blocks at start of input status=WHICH WHICH info to suppress outputting to stderr; 'noxfer' suppresses transfer stats, 'none' suppresses all N and BYTES may be followed by the following multiplicative suffixes: c =1, w =2, b =512, kB =1000, K =1024, MB =1000*1000, M =1024*1024, xM =M GB =1000*1000*1000, G =1024*1024*1024, and so on for T, P, E, Z, Y. Each CONV symbol may be: ascii from EBCDIC to ASCII ebcdic from ASCII to EBCDIC ibm from ASCII to alternate EBCDIC block pad newline-terminated records with spaces to cbs-size unblock replace trailing spaces in cbs-size records with newline lcase change upper case to lower case ucase change lower case to upper case sparse try to seek rather than write the output for NUL input blocks swab swap every pair of input bytes sync pad every input block with NULs to ibs-size; when used with block or unblock, pad with spaces rather than NULs excl fail if the output file already exists nocreat do not create the output file notrunc do not truncate the output file noerror continue after read errors fdatasync physically write output file data before finishing fsync likewise, but also write metadata Each FLAG symbol may be: append append mode (makes sense only for output; conv=notrunc suggested) direct use direct I/O for data directory fail unless a directory dsync use synchronized I/O for data sync likewise, but also for metadata fullblock accumulate full blocks of input (iflag only) nonblock use non-blocking I/O noatime do not update access time nocache discard cached data noctty do not assign controlling terminal from file nofollow do not follow symlinks count_bytes treat 'count=N' as a byte count (iflag only) skip_bytes treat 'skip=N' as a byte count (iflag only) seek_bytes treat 'seek=N' as a byte count (oflag only) Sending a USR1 signal to a running 'dd' process makes it print I/O statistics to standard error and then resume copying. $ dd if=/dev/zero of=/dev/null& pid=$! $ kill -USR1 $pid; sleep 1; kill $pid 18335302+0 records in 18335302+0 records out 9387674624 bytes (9.4 GB) copied, 34.6279 seconds, 271 MB/s Options are: --help display this help and exit --version output version information and exit AUTHOR Written by Paul Rubin, David MacKenzie, and Stuart Kemp. REPORTING BUGS Report dd bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report dd translation bugs to <http://translationproject.org/team/> COPYRIGHT Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO The full documentation for dd is maintained as a Texinfo manual. If the info and dd programs are properly installed at your site, the com‐ mand info coreutils 'dd invocation' should give you access to the complete manual. GNU coreutils 8.21 March 2014 DD(1) Manual page dd(1) line 134/170 (END) (press h for help or q to quit) |
|
相关推荐
|
|
只有小组成员才能发言,加入小组>>
621 浏览 0 评论
【KV260视觉入门套件试用体验】四、KV260 视觉入门套件和固件更新
1015 浏览 0 评论
【KV260视觉入门套件试用体验】Vitis AI Library体验之OCR识别
747 浏览 0 评论
【KV260视觉入门套件试用体验】Vitis AI 通过迁移学习训练自定义模型
968 浏览 0 评论
【KV260视觉入门套件试用体验】KV260系列之Petalinux镜像+Resnet 50探索
753 浏览 0 评论
【AMD KV260视觉入门开发套件试用】4、简单几步体验ubuntu 20.04.3 LTS运行人员检测应用
1474浏览 1评论
407浏览 1评论
【KV260视觉入门套件试用体验】老刘记事儿KV260初体验之Micro-SD选型提速研究(三)
674浏览 1评论
4354浏览 1评论
【KV260视觉入门套件试用体验】KV260部署yolov3实现车辆和行人检测
2083浏览 1评论
小黑屋| 手机版| Archiver| 电子发烧友 ( 湘ICP备2023018690号 )
GMT+8, 2024-8-4 09:28 , Processed in 0.833279 second(s), Total 70, Slave 54 queries .
Powered by 电子发烧友网
© 2015 bbs.elecfans.com
关注我们的微信
下载发烧友APP
电子发烧友观察
版权所有 © 湖南华秋数字科技有限公司
电子发烧友 (电路图) 湘公网安备 43011202000918 号 电信与信息服务业务经营许可证:合字B2-20210191