ERROR : Failed to mount squashfs image in (read only ...
groups.google.com › a › lblNov 17, 2019 · compression used when creating a squashfs file, compared to where it's being ran. For example, if you create a SquashFS image on Slackware, it defaults to being compressed with xz. This image won't run on RHEL 6, as the only compression available is gzip. So it's possible it's a compression issue. But, that's a guess with what's shown here.
[OpenWrt Wiki] The OpenWrt Flash Layout
openwrt.org › docs › techrefSquashFS-Images are suitable for devices with “raw NOR flash memory” -chips and it is not recommended to install them onto devices with “raw NAND flash memory” -chips. SquashFS-Images comprise both, a SquashFS partition and an JFFS2 partition. JFFS2-Images omit the SquashFS partition. Explanations